Yucca names.


This list of names have I found in various literature and many of the visitors of  www.bennyskaktus.dk has provided me with many names too. A lot of those many names are synonyms of others, but I do not know how many of them that are still valid and how many of the cultivars and hybrids that still are in cultivation at precent day? Also the growing interest for Yucca plants, and the explotion of hybrids made in the 21.st century, I will predict, that there will be introduced new varieties into cultivation almost every year for many years ahead.

I have not found the reference to all the names, and I would very much appreciate if any of the readers know something about any of the missing references, this could be from websites, seed list, plant lists or in books.

If anyone of the readers, grow any of the old hybrids or cultivars, I would be very happy to buy or trade plants, while those are rarely (read never!!) for sale here in Denmark.

If you are a Yucca breeder, please name your new cultivar according to the International Society for Horticultural Science (ISHS)

Please note following text which is from ISHS's web page about "how to name a new cultivar":
"Since 1959, new cultivar epithets must be in a language other than Latin and they must be unique within the so-called denomination class which is usually the genus. A few groups have special denomination classes and these may be found listed in Appendix III of the Code."

Lately it's become common to name a strain of Yucca hybrid seedlings of a single cross, with the same cultivar-name. Such strains should be named [Yucca "hybridname Grex" (species x species)] in order to let the reader know, that it's a seedling of a crossing, not a individual cultivar name.

For further information about naming plants, then visit these websites:

Name that Plant Great article at Plant Delights Nursery, Inc.

Cultivar.org Besides information about naming new cultivars, you can also registre your new cultivar.

If any you readers know of Yucca names that are not on this list please, send me an e-mail to me.

The names in Bold are those species which I consider valid. The hypertexts are to pages with the variety of the link.

Important note !  According to the international accepted  The Plantlist (which is a Collaboration between the Royal Botanic Gardens, Kew and Missouri Botanical Garden), there were made a lot of changes in 2012, these changes is not yet implemented in my list of names and The plantlist only lists a few of the cultivar names (mainly those of Sprenger and Deleuil).

For primary hybrids please look here. List of man made Yuccas made in the years from 1945 to present.



Yucca acaulis H. B. & K. Nov. Gen. et Sp. i. 289. = Fucraea acaulis (Kunth) B. Ullrich (Quepo 6: 69 (1992))
Yucca achrotricha Schiede in Linnaea, iv. (1829) 230 = Dasylirion arcotrichum
Yucca acuminata Hort. ex Carr.  in Rev. Hortic. Ser. IV. viii. (1859) 398
Yucca acuminata Sweet, Brit. Fl. Gard. 2: t.195 (1827)
Yucca acutifolia Truff.  in Rev. Hortic. (1869)320.
Yucca agavoides Hort. ex Carr.  in Rev. Hortic. Ser. IV. vii. (1858) 580
Yucca Albatros, Carl Sprenger 1920 ,hybrids of Yucca flaccida, Yucca filamentosa, Yucca recurvifolia or Yucca gloriosa
Yucca X albella Sprenger, lists 1 (1901), 2 (1902).
Yucca 'Albuquerque Mystery I' (hybrid of  recurvifolia x ? (Y. glauca)). Benny Møller Jensen, 2006 (Name not published yet!).
Yucca 'Albuquerque Mystery II' (hybrid ofrecurvifolia x ? (Y. glauca)). Benny Møller Jensen, 2006 (Name not published yet!).
Yucca albo-spica Hort. ex Van Houtte  in Flores des Serres, II vol. xvii. (1867-68) 110. fig. 1612 (nom. illeg. Art. 32.1c) = Yucca constricta
Yucca albospica
Yucca aletriformis Haw. Philosophical Magazine and Journal 1831:415. 1831. {Philos. Mag. J. ; BPH 706.25} = Dracaena aletriformis (Haw) Bos 1992
Yucca aloifolia Linneaus, Species Plantarum (1 May 1753) 319.
Yucca aloifolia Torr. in Pacif. Rail. Rep. iv. 147
Yucca aloifolia conspicua (red-green leaves)
Yucca aloifolia var. dragonis (Linne) Engelmann (1873) = Yucca aloifolia
Yucca aloifolia 'Blue Boy', name seen on Cistus nusery's plantlist www.cistus.com
Yucca aloifolia 'marginata' (variegated)
Yucca aloifolia rubra
Yucca aloifolia 'tricolor' (variegated)
Yucca aloifolia variegata (variegated)
Yucca aloifolia 'Quadricolor' (variegated ?)
Yucca aloifolia forma arcuata (Haw.) Voss in Vilmorin Vilm. Blumengarten., ed. 3 (ed. 3) 1: 1055. 1895  = Yucca aloifolia
Yucca aloifolia forma crenulata (Haw.) Voss in Vilmorin Vilm. Blumengarten., ed. 3 (ed. 3) 1: 1055. 1895 = Yucca aloifolia
Yucca aloifolia forma draconis (L.) Voss in Vilmorin Vilm. Blumengarten., ed. 3 (ed. 3) 1: 1055. 1895 = Yucca aloifolia
Yucca aloifolia forma genuina Engelm. Trans. Acad. Sci. St. Louis 3: 35. 1873 = Yucca aloifolia
Yucca aloifolia forma tenuifolia (Haw.) Voss in Vilmorin Vilm. Blumengarten., ed. 3 (ed. 3) 1: 1055. 1895 = Yucca aloifolia
Yucca aloifolia var. arcuata Trelease.  Rep. (Annual) Missouri Bot. Gard. 13: 92. 1902 = Yucca aloifolia
Yucca aloifolia var. conspicua (Haw.) Engelm.  Trans. Acad. Sci. St. Louis 3: 35. 1873 = Yucca aloifolia
Yucca aloifolia var. draconis (L.) Engelm. Trans. Acad. Sci. St. Louis 3: 35. 1873 = Yucca aloifolia
Yucca aloifolia var. menandi Trelease.  Rep. (Annual) Missouri Bot. Gard. 13: 93, pl. 50. 1902 = Yucca aloifolia
Yucca aloifolia var. stenophylla Bommer (1859) = Yucca aloifolia
Yucca aloifolia var. tenuifolia Trelease.  Rep. (Annual) Missouri Bot. Gard. 13: 93. 1902 = Yucca aloifolia
Yucca aloifolia var. yucatana (englm.) Trelease.  Rep. (Annual) Missouri Bot. Gard. 13: 93. 1902 = Yucca aloifolia
Yucca aloifolia x constricta Buckley, RBGE Living Collections Search Results
Yucca Americana filamentosa Munting, Waare Oeffining der planten, 471. f. (1668)  = Yucca filamentosa
Yucca 'Andreana', hybrid by J. B. Deleui (s.a.)
Yucca 'Anna', Hybrid made by Benny M. Jensen, Denmark in 2003 (BMJ#1827A), the name were published in CactusWorld [Vol. 33(1), pg. 15-18] March 11th. 2015.
Yucca angustifolia Carriére in Rev. Hortic. Ser. IV. ix. (1860) 20. f. 3, 4 (nom. illeg. Art. 53.1) = Yucca constricta
Yucca angustifolia Engelmann ex Trelease
Yucca angustifolia Hort. ex Carriére in Rev. Hortic. Ser. IV. viii. (1859) 398 = Yucca constricta
Yucca angustifolia Karw. ex G. Don  in Sweet, Hort. Brit. ed. III. 707, nomen
Yucca angustifolia Pursh, Flora Amer. Septentrionalis 1:227(1814) = Yucca glauca
Yucca angustifolia forma genuina Engelm.  Trans. Acad. Sci. St. Louis 3: 50. 1873
Yucca angustifolia forma stricta (Sims) Voss in Vilmorin Blumengarten., ed. 3 (ed. 3) 1: 1057. 1895
Yucca angustifolia var. elata Engelmann Trans. Acad. SCI. St. Louis, a superfluous substitute 3:50 (1873)  (nom. illeg. Art. 52.1)  = Yucca elata
Yucca angustifolia var. elata Engelmann (1871)  = Yucca elata
Yucca angustifolia var. mollis Engelmann in Trans. Acad. SCI. St. Louis, 3: 51 (1873). = Yucca arkansana
Yucca angustifolia var. radiosa Engelmann in King: U.S. Geol. Expl. 40th Par. Rpt. 5: 496. (1871)= Yucca elata
Yucca angustifolia var. stricta Baker   = Yucca glauca ssp. stricta
Yucca angustissima Engelmann ex Trelease, in Mo. Bot. Gard. Ann. Rpt. 13: 58 (1902)
Yucca angustissima 'South Side' Cistus introduction, name seen on Cistus nusery's plantlist www.cistus.com
Yucca angustissima ssp. avia (Reveal ) Hochstaetter Cactaceae-Review IRT 1 (2): 21 (1998)
Yucca angustissima var. avia Reveal, (1977) = Yucca angustissima ssp. avia
Yucca angustissima ssp. kanabensis (McKelvey) Hochstaetter Cactaceae-Review IRT 1 (2): 21 (1998)
Yucca angustissima var. kanabensis (McKelvey) Reveal (1977) = Yucca angustissima ssp. kanabensis
Yucca angustissima ssp. toftiae (Welsh) Hochstaetter Cactaceae-Review IRT 1 (2): 21 (1998)
Yucca angustissima var. toftiae (Welsh) Reveal (1977)  = Yucca angustissima ssp. toftiae
Yucca antwerpensis Hort. ex  Baker (1880)  = Yucca flaccida
Yucca arborescens (Torrey) Trelease, in Mo. Bot. Gard. Ann. Rpt. 3: 163. 1892 = Yucca brevifolia
Yucca arcuata Haworth (1819) = Yucca aloifolia
Yucca argospatha Verlot, in Rev. Hort. pg. 393 1868 = Yucca treculeana
Yucca argyrophylla Hort  ex. Lemaire (1863) = Furcreae bedinghausii
Yucca armata Steudel (1840). = Yucca aloifolia
Yucca arizonica McKelvey, in Arnold Arboretum Jour. 16:270, 1935
Yucca arkansana McKelvey, Yucca S.W.U.S. 2 1947 = Yucca arkansana Trelease
Yucca arkansana Trelease
Yucca arkansana ssp. arkansana Trelease (Hochstaetter 1998)
Yucca arkansana ssp. freemanii name from Hochstaetter catalog # 14,1999.
Yucca arkansana ssp. freemanii (Shinners) Hochstaetter, Yucca In the Southwest and Midwest of the USA and Canada, vol. 1:61. 2000
Yucca arkansana ssp. louisianensis (Trelease) Hochstaetter, Kaktusbluete 16:25-31. 1999
Yucca arkansana var. paniculata McKelvey, Yucca S.W.U.S. 2:156-160 1947 = Yucca arkansana ssp. louisianensis
Yucca aspera Engelmann, in Acad. Sci. St. Louis Trans. 3:37 1873 = Yucca treculeana
Yucca ' Aurora ' Hort =  hybrid  by Carl Sprenger   Yucca filamentosa Yucca recurvifolia
Yucca australis (Engelmann) Trelease 1902, = ?
Yucca australis Trelease in Mo. Bot. Gard. Ann. Rpt. 4:190 (1893)  (nom. illeg. Art. 53.1) = Yucca faxoniana
Yucca australis Coult., in  U.S. Natl. Herbarium Contrib. 2:436 ( in part) 1894 = Yucca faxoniana
Yucca australis var. valida Jones, M. E., in M. E. Jones Contr. W. Bot. no. 15: 59, 146. (1929)  (nom. illeg. Art. 43.1) = Yucca faxoniana
Yucca Astra, Carl Sprenger 1920, hybrid of Yucca flaccida,  Yucca filamentosa,Yucca recurvifolia or Yucca gloriosa
Yucca Athene, Carl Sprenger 1920 , hybrid of Yucca treculeana canaliculata, recurvifolia or gloriosa
Yucca atkinsi, Hort, Baker in Linnean Society Bot. Journal. Vol. 18: (1881)
Yucca atkinsii Trelease (18949
Yucca baccata Torrey, in Emory, Rep. U.S. Mex. Bound., Bot. 2(1): 221. 1859
Yucca baccata forma circinata (Baker) Voss in Vilmorin Blumengarten., ed. 3 (ed. 3) 1: 1058. 1895
Yucca baccata forma fragilifolia (Baker) Voss in Vilmorin Blumengarten., ed. 3 (ed. 3) 1: 1058. 1895
Yucca baccata forma genuina Engelm. Trans. Acad. Sci. St. Louis 3: 44. 1873
Yucca baccata forma periculosa (Baker) Voss in Vilmorin Blumengarten., ed. 3 (ed. 3) 1: 1058. 1895
Yucca baccata var. australis, Engelmann  Acad. Sci.  St.  Louis 3: 44 (1873) = Yucca torreyi
Yucca baccata var. brevifolia (Schott ex Torr.) L. D. Benson & Darrow, in Amer. Jour. Bot. 30: 234.1943 =  (in part) Yucca arizonica
Yucca baccata var. circinata Baker in Linnean Society Bot. Journal. Vol. 18:230 (1881)
Yucca baccata var. filifera Schelle in Beissn., Schelle & Zabel, Handb. Laubholzben. 6. 1903
Yucca baccata var. fragifolia Baker  Linnean Society Bot. Journal. Vol. 18:230 (1881)
Yucca baccata var. grandiflora
Yucca baccata var. hystrix Baker  Linnean Society Bot. Journal. Vol. 18:230 (1881)
Yucca baccata var. macrocarpa Torrey,  in Emory, U.S. and Mex. Bound. Bot. pg. 221.1893 = Yucca torreyi
Yucca baccata var. perculosa Baker  Gard Chron. 1088 (1870)
Yucca baccata var. scabrifolia Baker  Linnean Society Bot. Journal. Vol. 18:230(1881)
Yucca baccata var. vespertina McKelvey, in Yuccas Southwest. U.S. 1: 45, pls. 13, 14, 15, 1938 = Yucca baccata ssp. vespertina
Yucca baccata var. vespertina 'Hualampai Blue' Cistus introduction, name seen on Cistus nusery's plantlist www.cistus.com
Yucca baccata var. thornberi, Invalid not published! = Yucca baccata ssp. thornberi
Yucca baileyi Wooton & Standley. Contr. U. S. Natl. Herb. 16: 114.(1913)
Yucca baileyi var. navajoa (Webber) Webber, Agric. Monogr. U.S.D.A. 17: 51. 1953 = Yucca baileyi
Yucca baileyi ssp. intermedia (McKelvey) Hochstaetter Cactaceae-Review IRT 1 (2): 21 (1998)
Yucca baileyi var. intermedia (McKelvey) Reveal. Intermountain Flora, Vascular Plants of the Intermountain West, 532, (1977) = Yucca baileyi ssp. intermedia
Yucca baileyi var. vespertina ?
Yucca barrancasecca Hort. ex Pasquale, Cat. Orto Bot. Nap. 108, nomen (Quid ?).
Yucca bella name occurred in Christa's Cactus seed catalogue 1994 - 1995 on page 12. = A dwarf form of Yucca baileyi
Yucca 'Blue Boy'
Yucca boerhaavii Baker, Gard. Chron. (ser. 2) 30: 1217 (1870)= Yucca flexilis var. boerhaavii
Yucca boscii Desfontaines. Tabl. ed. II. 28 (1815) = Agave geminiflora
Yucca boscii Hort. Par. ex Hornem. Hort. Hafn.:ÿcf. D.J. Mabberley in Taxon, 342 (1813);ý33(3): 438 (1984) = Agave geminiflora
Yucca brevifolia Engelmann, in King, U.S. Geol. Expl. 40th Parallel Rpt. 5: 496. 1871
Yucca brevifolia Schott. Ex Torr., in Emory, U.S. and Mex. Bound. Bot. pg. 221, 1859 = Yucca arizonica McKelvey
Yucca brevifolia var. jaegeriana, McKelvey, in Arnold Arboretum Jour. 16: 269. pl. 139. (1935)
Yucca brevifolia forma herbertii forma nov. Webber, Agric. Monogr. U.S.D.A. 17: 32. (1953)
Yucca brevifolia var. herbertii  (J. M. Webber) Munz Aliso 4: 88. (1958)
Yucca brevifolia forma kernensis Fritz Hochstätter (2000) (nom. illeg. Art. 32.1c) = Yucca brevifolia
Yucca brevifolia var. kernensis. Dibrell A., name occurring The Amateurs' Digest, Vol. 10 Issue 1 May (1998).
Yucca brevifolia var. wolfei Jones, in West Bot. Contrib. 18: 125, 1935 = Yucca brevifolia var. jaegeriana
Yucca 'Bright Star' 2006 PlantHaven® (US Plant Patent: # 17,653, under the name WALBRISTAR ) (variegated)
Yucca californica Groenland, Rev. Hort. ( Paris ), pg. 434,16 Aug. 1858 = Yucca whipplei
Yucca californica Lem. Illustr. Hortic. x. (1863) sub I. 372   = Yucca whipplei
Yucca californica Nutt. Ex Baker,  in Linn. Soc. London, Jour., Bot. 18:229 (as syn. Y. baccata Torr.) 1880= Yucca schidigera
Yucca campestris McKelvey, Yuccas Southwest. U.S. pt. 2:173-179, tab. 62, 63. (1947)
Yucca canaliculata Hooker, in Bot. Mag. pg. 89, plate 5201, (1860) = Yucca treculeana
Yucca canaliculata var. filifera (Chabaud) Fenzi (1889) = Yucca filifera
Yucca capensis Lenz, L. W. (1998),  A new species from Baja California sur, Mexico. Cact. & Succ. Journal. Amer. 70 (6): 289-296, 7 figs.
Yucca carnerosana (Trelease, 1902 ) McKelvey in Yuccas of the S.W.U.S. 1:24 1938
Yucca ' Ceres ' Hort = hybrid by Carl Sprenger   Yucca filamentosa Yucca recurvifolia
Yucca cernua Keith E. L. Publication: Sida 20(3): 892 (891-898; figs. 1-2) 2003 [29 Jul 2003], status not sure, maybe a natural hybrid with genes from Yucca rupicola or Yucca pallida?
Yucca carrierei Ed. Andre in Rev. Hortic. lxxvii. (1895) 81, fig. 21-23. = Hybrid ?
Yucca chilensis Hort.
Yucca circinata Baker in Gard. Chron. (1870) 1088 = Yucca baccata
Yucca coahuilensis, Matuda & Pina-Lujan, Las Plantas Mexicanas del Genero Yucca 120 (1980)
Yucca concava Lemaire, III. Hort. 13:98 Yucca filamentosa ssp. concava
Yucca concava Haworth, Suppl. Pl. Succ. 34  (1819) Yucca filamentosa ssp. concava
Yucca concava Hort. ex Baker in Journal. Linn. Soc. xviii. 228 (1880) =  Yucca filamentosa ssp. concava
Yucca 'Color Guard' (Japanese patented and trademarked clone, Plant Delights Nursery, Inc.)
Yucca colo-ma Andrews, Cat. Rockmont Nursery 1926: 22 = Yucca harrimaniae
Yucca coloma in Nat. Hort Magaz. 2: 232, 1932 = Yucca harrimaniae
Yucca Comesii, Carl Sprenger 1920, hybrid of Yucca flaccida,  Yucca filamentosa,Yucca recurvifolia or Yucca gloriosa
Yucca confinis McKelvey Yuccas South-west U.S. 49, pls. 16, 17, 18. (1938)
Yucca constricta Buckley., in Phil. Acad. Nat. Sci. Roc., 1862:8 1863
Yucca constricta Trelease, in Mo. Bot. Gad. Ann. Rpt. 13: 54-56 (in part) 1902 = ?
Yucca conspicua Haw  Synopsis Plantarum  Succulentarum suppl. 32 = Yucca aloifolia
Yucca conspicua Hort. ex Regal Gartenfl. xx. (1871) 149 (nom. illeg. Art. 53.1)
Yucca contorta Hort. ex Carriére. in Rev. Hortic. Ser. IV. vii. (1858) 579, 580.
Yucca cornuta Hort. ex Baker in Journal. Linn. Soc. xviii. (1880)226 = Yucca treculeana ?
Yucca crassifila Engelm. in Trans. Acad. Sc. St. Louis, iii. (1873) 44 = Yucca baccata  or Yucca torreyi
Yucca crenulata Haw  Synopsis Plantarum  Succulentarum suppl. 33 - 34 (1819) = Yucca aloifolia
Yucca crinifera Lemaire. in Hort. Vanhoutt. i. Fasc. 2, 23 (1846).
Yucca 'Danica' P.C.O. Nørgaard´s nursery, Sundby Mors, Denmark. Probably a form or hybrid of Yucca recurvifolia
Yucca decipiens Trelease. Rep. (Annual) Missouri Bot. Gard. 18: 228.1907
Yucca declinata Laferriere, J. E., Cact. Succ. J. (USA) 67(6):347-348 (1995) - illus.
Yucca Delpinoana, Carl Sprenger 1920, hybrid of Yucca flaccida,  Yucca filamentosa,Yucca recurvifolia or Yuccagloriosa
Yucca de-smetiana Baker (Gard. Chron. 30 (3): 1217 (1870)) Is known only from cultivation and are probably an hybrid between Yucca aloifolia X Yucca recurvifolia or Yucca filamentosa? or "just" a purpleleaved form of Yucca aloifolia!? (small in-vitro propagated plants available from the Dutch in vitro lab Succulent Tissue Culture).
Yucca declinata J.E. Laferriere in Cact. Succ. J. (U.S.A.), 67 (6): 347 (1995)
Yucca draco Carr. in Rev. Hortic. Ser. IV. viii. (1859) 389= Dracaena draco ?
Yucca draconis Linn. (1956)  = Yucca aloifolia
Yucca draconis Linn.  Sp. 457 (1753), (Dill. Hort. Elth. T. 417)  = Yucca aloifolia
Yucca draconis Linn. Amoen. Acad. iii. 407 = Dracaena draco
Yucca draconis var. arborescens Torr. in Whipple Pacific Railroad. Rep. 4, Pt. 5, No. 4 (Whipple) 147. 1857 = Yucca brevifolia
Yucca ehrenbergii Baker in Journal. Linn. Soc. xiv. (1875) 538, nomen.
Yucca ellacombei = Yucca gloriosa
Yucca elata Engelmann 1882 Bot. Gaz. 7: 17.(1882.)
Yucca elata 'Bonita'
Yucca elata var. magdalena Hort. Mattern (s.a.) (nom. illeg. Art 29.1) also in Fritz Hochstätter seed list #13
Yucca elata var. utahensis (McKelvey) Reveal, Intermountain Flora, Vascular Plants of the Intermountain West: (1977)  = Yucca elata ssp. utahensis
Yucca elata ssp. utahensis (McKelvey) Hochstaetter, Cactaceae-Review IRT 1 (2): 21 (1998)
Yucca elata var. verdiensis (McKelvey) Reveal, Intermountain Flora, Vascular Plants of the Intermountain West: (1977) = Yucca elata ssp. verdiensis
Yucca elata ssp. verdiensis (McKelvey) Hochstaetter, Cactaceae-Review IRT 1 (2): 21 (1998)
Yucca elegans name seen at http://www.flordosol.com/yucceleg.html
Yucca 'Elegantissima' Sprenger, list 1, 2. ( hybrid of Yucca filamentosa var. major X Yucca gloriosa)
Yucca "Elena grex", hybrid of Yucca glauca x angustissima var. toftiae made by Sascha Svatek, Germany in 200?.
Yucca 'Elena's Star' Hybrid by Benny M. Jensen, Denmark 2003, the name were published in "Der Wüstengarten 2, april 2011".
Yucca elephantipes Regel
Yucca elephantipes variegata (variegated)
Yucca elephantipes 'Cream Heart' Cotswold Garden Flowers (Online catalog 2007)

Yucca elephantipes 'Dodo' Cotswold Garden Flowers (Online catalog 2007)

Yucca elephantipes 'Elmila' (variegated)(Koolhaas Bleiswijk B.V., The Netherlands)

Yucca elephantipes 'Frosty Morn' Cotswold Garden Flowers
Yucca elephantipes 'Jewel' (variegated)
Yucca elephantipes 'Mike' (Koolhaas Bleiswijk B.V., The Netherlands)
Yucca elephantipes 'Puck' (variegated)
Yucca elephantipes 'Silver Star' (variegated)(Henk Ibes Holland B.V., Tthe Netherlands)
Yucca elephantipes x Yucca filifera hybrid
Yucca elyesii Hort  Baker, in Linnean Society Bot. Journ. Vol. 23:4 (1881) as syn of Yucca flexilis var. ensifolia Carriere
Yucca endlichiana, Trelease in Ann. Rept. Missouri Bot. Gard. 18: 229-230, pl. 15-17 (1907)
Yucca endentata
Yucca ensifolia Hort, Baker in Gard. Chron. Sept. 10 :1217 (1870)
Yucca 'Eros', Carl Sprenger 1920, hybrid of Yucca flaccida glaucescens x recurvifolia
Yucca ' Exsultans ' Hort = hybrid by Carl Sprenger Yucca filamentosa Yucca recurvifolia
Yucca exigua Baker (1871)  = Yucca flaccida
Yucca falcata, Carl Sprenger 1920, hybrid of Yucca flaccida,  Yucca filamentosa, Yucca recurvifolia or Yucca gloriosa
Yucca faxoniana Trelease (Sarg.) in Manual Trees N. Amer., pg. 121 1905 .
Yucca faxoniana var. carnerosana
Yucca faxoniana X Yucca glauca, F2 hybrid in Mesa garden seed list 1997
Yucca 'Flora', Carl Sprenger 1920, hybrid of Yucca flaccida glaucescens x recurvifolia
Yucca filamentosa Linneaus Sp. Pl. 319 (1753)
Yucca filamentosa Riddell
Yucca filamentosa Hort. not Linnaeus = Yucca flaccida Haw.
Yucca filamentosa sensu Baker in Saunders Refug. Bot. 5: t.324(1872) = Yucca flaccida
Yucca filamentosa Wood in Roc. Acad. Sc. Phial. (1868) 167 (Nom. illeg., art 53.1) = Yucca baccata
Yucca filamentosa aurea elegantissima Wiener III. Gart. Zeit. 5:389 (1880)
Yucca filamentosa Aureovariegata (variegated)
Yucca filamentosa bicolor Hort.
Yucca filamentosa forma variegata. (variegated)
Yucca filamentosa forma concava (Haw.) Voss, Vilmorin Blumengarten (ed. 3) 1: 1057 (1895) = Yucca filamentosa ssp. concava
Yucca filamentosa forma flaccida (Haworth) Voss, Vilmorin Blumengarten (ed. 3) 1: 1057 (1895) = Yucca flaccida
Yucca filamentosa forma glaucescens (Haworth) Voss, Vilmorin Blumengarten (ed. 3) 1: 1057 (1895) = Yucca flaccida
Yucca filamentosa forma genuina Engelm. Trans. Acad. SCI. St. Louis 3: 51. (1873) (Nom. inval., art 24.3) = Yucca flaccida
Yucca filamentosa forma orchioides (Carriere) Voss, Vilmorin Blumengarten (ed. 3) 1: 1057 (1895) = Yucca flaccida
Yucca filamentosa forma puberula (Haworth) Voss, Vilmorin Blumengarten (ed. 3) 1: 1057 (1895) = Yucca flaccida
Yucca filamentosa ssp. concava (Haworth) Hochstaetter, Kaktusbluete 18 :11 (2001)
Yucca filamentosa ssp. filamentosa (Linneaus) Hochstaetter, Kaktusbluete 18 :10 (2001)
Yucca filamentosa ssp. smalliana (Fernald) Hochstaetter, Kaktusbluete 18 :10 (2001)
Yucca filamentosa var. flaccida Engelmann (1873) = Yucca flaccida
Yucca filamentosa var. smalliana (Fernald) H. E. Ahles J. Elisha Mitchell Sci. Soc. 80: [172]. 1964 = Yucca filamentosa ssp. smalliana
Yucca filamentosa var. bracteata Engelmann, Trans. Acad. SCI. St. Louis 3: 52 (1873) = Yucca filamentosaor Yucca flaccida ?
Yucca filamentosa var. concava (Haworth) Baker, Journal. Linn. Soc., Bot. 18: 228 (1880) =  Yucca filamentosa ssp. concava
Yucca filamentosa var. flaccida (Haworth) Engelmann, Trans. Acad. Sci. St. Louis 3: 52 (1873) = Yucca flaccida
Yucca filamentosa var. glaucescens Trelease  = Yucca filamentosa
Yucca filamentosa var. grandiflora Baker in Saunders Refug. Bot. 5: t.325 (1872) = Yucca flaccida
Yucca filamentosa var. laevigata Engelm. Trans. Acad. SCI. St. Louis 3: 52. (1873) = Yucca flaccida
Yucca filamentosa var. latifolia Engelmann, Trans. Acad. SCI. St. Louis 3: 52 (1873) = Yucca filamentosa ssp. concava
Yucca filamentosa var. major
Yucca filamentosa var. maxima Baker in Saunders Refug. Bot. 5: t.325 (1873) = Yucca filamentosa
Yucca filamentosa var. media
Yucca filamentosa var. mexicana S. Schauer Linnaea 19:703. (1847)  = Yucca flaccida
Yucca filamentosa var. recurvifolia Alph. Wood Class-bookBot. (ed. 1861) 709. (1861)  = Yucca flaccida
Yucca filamentosa var. Vomerensis, SYDOW, G., Kaktus 12 (2):32 (1977)
Yucca filamentosa ' Atlanta ' Hort
Yucca filamentosa ' Bright Edge ' = Yucca flaccida 'Bright Edge' (variegated)
Yucca filamentosa ' Bronze Age ' (Walters Gardens, new 2014)

Yucca filamentosa ' Clockenriese ' Hort
Yucca filamentosa ' Color Guard ' (variegated)
Yucca filamentosa ' Concava Variegata ' (variegated)
Yucca filamentosa ' Concava Albovariegata'  Yucca filamentosa ssp. concava  'albovarigata' (variegated)
Yucca filamentosa ' Eisbar '
Yucca filamentosa ' Elegantissima ' = Yucca ' Elegantissima ' hybrid by Carl Sprenger, Yucca Yucca filamentosa media x gloriosa
Yucca filamentosa ' Elite '
Yucca filamentosa 'Excalibur' (Walters Gardens, 2014) selected seedling of Yucca filamentosa ' Hairy '

Yucca filamentosa ' Florida ' Hort
Yucca filamentosa ' Fontane '
Yucca filamentosa ' Garland Gold ' (Plant Delights Nursery, Inc.) = Yucca flaccida 'Garland Gold' (variegated)
Yucca filamentosa ' Glockenbusch ' Hort Walter Schimana selection of the Yuccafilamentosa-flaccida complex.
Yucca filamentosa ' Glockenriese '
Yucca filamentosa ' Grossglockner '

Yucca filamentosa ' Gold Heart ' (sport from 'Wilder's Wonderful' from plantsman Bobby Wilder).
Yucca filamentosa ' Gold Stripe' a new variegated sport originating from  Yucca 'Golden Sword ' (variegated) name seen on Cistus nusery's plantlist www.cistus.com
Yucca filamentosa ' Golden Sword '  =  Yucca  ? 'Golden Sword ' (variegated)
Yucca filamentosa ' Hairy ', selected at the JC Raulston Arboretum in the early 1990s.
Yucca filamentosa ' Harrold' , Name occur in Mitteilungen Deutschen Dendrol. Gesell. 29: 96-138 + pls.: 21-22. (1920)
Yucca filamentosa ' Herkulessaeule '
Yucca filamentosa ' Hoffer Blue '.  (name from Gilson Ground covers in Ohio)
Yucca filamentosa ' Ivory Tower ' Hort = Yucca flaccida 'Ivory Tower'
Yucca filamentosa ' Milchstern '
Yucca filamentosa ' Morgenglocke '
Yucca filamentosa ' Missouri ' Hort
Yucca filamentosa ' Ohio ' Hort
Yucca filamentosa ' Rosemarie' Hort Walter Schimana selection of the Yuccafilamentosa-flaccida complex. Or maybe a Yuccafilamentosa-flaccida complex x glauca complex, but this is pure speculation.
Yucca filamentosa ' Rosenclocke ' Hort
Yucca filamentosa ' Schellenbaum ' Hort
Yucca filamentosa ' Scheefichte ' Hort
Yucca filamentosa ' Scheetanne ' Hort

Yucca filamentosa ' Snow Spruce ' = Yucca filamentosa ' Scheefichte ' Hort
Yucca filamentosa ' St. Louis '

Yucca filamentosa ' Wilder's Wonderful ' (from plantsman Bobby Wilder).
Yucca filamentosa ' Yoe's Blue ' (Willowbrook nurseries Inc., Canada)
Yucca filata Invalid Cultivarname,for a hybrid made by Fritz Hochstaetter (1999) (Yucca filamentosa x Yucca elata, fh 1180.88)
Yucca filifera Chabaud (Rev Hort. 48: 432-434 (1876) (nom. illeg. Art. 53.1 ?!) = (This species needs a new name!)
Yucca filifera Hort ex. Engelmann (1873).=  Yucca baccata
Yucca filifera forma variegata (variegated)
Yucca filifera var. decipiens
Yucca filifera ' Golden Sword ' = Yucca ? ' Golden Sword ' (variegated)
Yucca filifera ' Ivory ' = Yucca flaccida ' Ivory'
Yucca filifera ' Orchioides ' = Yucca flaccida ' Orchioides '
Yucca flaccida Haworth, Suppl. Pl. Succ. 34 (1819)
Yucca flaccida variegata. (variegated)
Yucca flaccida marginata. (this one could be = ' Bright Edge') (variegated)
Yucca flaccida var. glaucescens (Haworth) Trelease, Rept. Mo. Bot. Gard. 13: 51, pl. 12-15, 17 (1902) = Yucca flaccida
Yucca flaccida var. major (Baker) REHDER, Journal. Arnold Arbor. 1: 193 (1920) = Yucca flaccida
Yucca flaccida var. integra Trelease, Rept. Mo. Bot. Gard. 13: 51-52 (1902) = Yucca flaccida
Yucca flaccida f. orchioides (Carriere) Trelease, Rept. Mo. Bot. Gard. 13: 50-51 (1902) = Yucca flaccida
Yucca flaccida var. grandiflora (Baker) Trelease, Rept. Mo. Bot. Gard. 13: 52 (1902) = Yucca flaccida
Yucca flaccida f. lineata
Yucca flaccida f. integra Trelease
Yucca flaccida var. aurea-marginata. (this one could be = 'Bright Edge' ?) (variegated)
Yucca flaccida var. smalliana  = Yucca filamentosa ssp. smalliana 'Ivory'
Yucca flaccida ' Bayerwald '
Yucca flaccida ' Bergkristall '
Yucca flaccida ' Bright Edge'  = Yucca ? 'Bright Edge' (variegated)
Yucca flaccida ' Blue Sentry '
Yucca flaccida ' Diamant ' (Werner Vogel's Yucca catalouge) (variegated)
Yucca flaccida ' Garland Gold ' (variegated)
Yucca flaccida 'Green Goddess' (2008), New interesting variegated Yucca grown from seeds by Martin Tversted, Denmark.
Yucca flaccida ' Golden Sword ' = Yucca ? ' Golden Sword ' (variegated)
Yucca flaccida ' Ivory ' Rowland Jackman, received an "Award of Merit" from the Royal Cultural Society in 1966
Yucca flaccida ' Ivory Tower ' = ? maybe a variegated Yucca ?  (variegated)
Yucca flaccida 'New Berlin' (name from tropengarten.de 2003).
Yucca flaccida ' Nürnberg '
Yucca flaccida ' Orchioides '
Yucca flaccida ' Yellow Sword ' (this could be a synonym for Yucca flaccida ' Golden Sword ' ) (variegated)
Yucca flexilis Carriere, Rev. Hort. 8: 308, t.89 (1859)
Yucca flexilis var. boerhaavii (Baker) Trelease, Rept. Mo. Bot. Gard. 13: 80 (1902)
Yucca flexilis var. falcata, Hort. Peacock, BAKER, J.G. name occur in Linnean society Bot. Journal. Vol. 18:224 (1881)
Yucca flexilis var. hildrethi Trelease, Rept. Mo. Bot. Gard. 13: 80 (1902)
Yucca flexilis var. nobilis Hort Peacock, BAKER, J. G. name occur in Linnean Society Bot. Journal. Vol. 18:224 (1881)
Yucca flexilis var. patens (Andre) Trelease, Rept. Mo. Bot. Gard. 13: 81 (1902)
Yucca flexilis var. peacockii (Baker) Trelease, Rept. Mo. Bot. Gard. 13: 79 (1902)
Yucca flexilis var. tortulata (Baker) Trelease, Rept. Mo. Bot. Gard. 13: 80 (1902)
Yucca flexilis var. semicylindrica, Baker, Gard. Chron., 1217, 1870
Yucca flexilis forma ensifolia (Baker) Voss, Vilmorin Blumengarten (ed. 3) 1: 1056 (1895)
Yucca 'Floribunda', Carl Sprenger 1920, hybrid of Yucca filamentosa x gloriosa
Yucca folis filamentosis Moriton, Plant. Hist. 2:419. Sect. 4. pl. 23. (1680)  = Yucca filamentosa
Yucca folis lanceolatis acuminatis integerrimis margine filamentosis Gronovius Fl. Virgin 152. (1739) = Yucca filamentosa
Yucca fragilifolia Baker (1870).=  Yucca baccata
Yucca freemanii Shinners = Yucca arkansana ssp. freemanii
Yucca Fredrich der Grosse, Carl Sprenger 1920, hybrid of Yucca treculeana canaliculata,recurvifolia or gloriosa
Yucca fuauxiana hort. (s.a.)
Yucca funifera K. Koch (1862) = Hesperaloe funifera
Yucca ghiesbreghtii Hort ex Baker in Journal. Linn. Soc. xviii. (1880) 222 = Yucca elephantipes
Yucca gigantea Baker (1880) = Yucca elephantipes Regel
Yucca gigantea Lemaire (1859).
Yucca gilbertiana (Trelease) Rydberg. Fl. Rocky Mts. pp 1701061. 1917 (1918). = Yucca harrimaniae ssp. gilbertiana
Yucca glauca Nuttall 1813. In Frasers catalogue of new and interesting plants, Frasers Nursery 1813
Yucca glauca Sims, Curtis's Bot. Mag. 53: t.2662 (1826) not Nuttall in Fraser (1813) = Yucca flaccida
Yucca glauca Nousette ex Sims (1826)( not Nuttall in Fraser (1813))  (nom. illeg. Art. 53.1 ?!) = Yucca flaccida
Yucca glauca Trelease, in MO. Bot. Gard. Ann. Rpt. 13: 59, (in part) (1902) = Yucca glauca Nuttall
Yucca glauca mollis Branner & Coville, in Ann. Rept Geol. Surv. Arkansas, 4: 224 (1888) = Yucca arkansana
Yucca glauca ssp. albertana Hochstaetter, Piante Grasse 20(1): 3-10. (2000)
Yucca glauca ssp. glauca (Nuttall) Hochstaetter, in Cactaceae-Review, germany, 1 (2):21, (1998)
Yucca glauca ssp. stricta (Sims) Hochstaetter, in Cactaceae-Review, germany, 1 (2):21, (1998)
Yucca glauca var. angustissima = Yucca angustissima
Yucca glauca var. arkansana = Yucca arkansana
Yucca glauca var. baileyi = Yucca baileyi
Yucca glauca var. "bella", Desert Moon Nursery Catalog 1993.= probably a dwarf form of Yucca baileyi
Yucca glauca var. constricta hort Mesa Garden (s.a) (Nom. illeg. Art. 30.3) = Yucca constricta
Yucca glauca var. elata = Yucca elata
Yucca glauca var. gurneyi McKelvey (1947) = Yucca glauca ssp. stricta (Sims) Hochstaetter
Yucca glauca 'Herrenhausen', name origin unknown.
Yucca glauca var. intermedia = Yucca baileyi ssp. intermedia
Yucca glauca var. kanabensis = Yucca angustissima ssp. kanabensis
Yucca glauca var. mollis Engelmann ex Branner & Coville = Yucca arkansana
Yucca glauca var. montana
Yucca glauca var. neomexicana
Yucca glauca var. paniculata = Yucca arkansana ssp. louisianensis
Yucca glauca var. radiosa = Yucca elata
Yucca glauca var. rosea D.M. Andrews, Rockmount Nursery Catalogue Autumn 1933: 25, Spring 1934 =  Yucca glauca
Yucca glauca var. stricta  Sims. In Bot. Mag. 48 (1821) = Yucca glauca ssp. stricta
Yucca glauca var. toftiae = Yucca angustissima ssp. toftiae
Yucca glauca x schidigera  hybrid
Yucca glaucescens Haworth, Suppl. Pl. Succ. 34 (1819) = Yucca flaccida
Yucca 'Glockenstab' Walter Schimana selection hybrid of Yuccafilamentosa-flaccida complex x glauca complex.
Yucca gloriosa Linneaus
Yucca gloriosa Hort not Linneaus = Yucca elephantipes
Yucca 'Medio-picta' Carriere (1880) (yellow central band) (variegated)
Yucca gloriosa mediostriata = Yucca 'Medio-picta' (yellow central band) (variegated)
Yucca gloriosa variegata (yellow edge) (variegated)
Yucca gloriosa forma obliqua (Haworth) Voss, Vilmorin Blumengarten (ed. 3) 1: 1057 (1896)
Yucca gloriosa forma recurvifolia (Salisbury) Voss, Vilmorin Blumengarten (ed. 3) 1: 1057 (1896)
Yucca gloriosa forma rufocinta (Haworth) Voss, Vilmorin Blumengarten (ed. 3) 1: 1057 (1896)
Yucca gloriosa forma tortulata (Baker) Voss, Vilmorin Blumengarten (ed. 3) 1: 1057 (1896)
Yucca gloriosa var. acuminata Carriere, Revue Horticole 1868: 157 (1868)
Yucca gloriosa var. ellacombei Baker. = Yucca gloriosa Linneaus
Yucca gloriosa var. flexilis (Carriere) Trelease in Bailey, Cyclop. Amer. Hort. 2001 (1902)
Yucca gloriosa var. mollis Carriere, Revue Horticole 9: 362 (1860)
Yucca gloriosa var. nobilis Carriere.
Yucca gloriosa var. plicata Carriere
Yucca gloriosa var. recurvifolia (Salisbury) Engelmann
Yucca gloriosa var. robusta Carriere.
Yucca gloriosa var. suberba Baker. = Yucca gloriosa Linneaus
Yucca gloriosa var. tristis CARRIERE, Revue Horticole 9: 363 (1860)
Yucca gloriosa 'Lady in Red', Name seen online in a forum..
Yucca gloriosa 'Lone Star', name seen on the website of Plant Delights Nursery, Inc., green sport from

Yucca gloriosa 'Rainbow'. name seen on the spanish nursery website: www.viveroscanos.com
Yucca gloriosa 'Tiny Star', name seen on the website of Plant Delights Nursery, Inc. (variegated),
Yucca gloriosa 'Moon Frost' (variegated) (maybe = Yucca elephantipes 'Jewel'?)
Yucca gloriosa 'Superba'. Gerard Pury's private garden in Vancouver B.C., Canada. Illustration frontpage of Hardy Palm international Edition 35 August 1998.
Yucca gloriosa 'Tricolor' (variegated), name seen on Cistus nusery's plantlist 2007 www.cistus.com, Yucca gloriosa variegata ?
Yucca gloriosa 'Walbristar' PP 17,653 (variegated)
Yucca graminifolia Wood, in Acad. Nat. Sci. Phil. Roc., pg. 167. (1868) = Yucca whipplei
Yucca graminifolia (Zuccarini) Zuccarini (1837) = Dasylirion graminifolium
Yucca grandiflora GENTRY, H.S., Yucca grandiflora Gentry  Mandroño 14:51-53 (1957)
Yucca grasilis Link ex. Sweet (1830) = Dasylirion graminifolium or Yucca whipplei ?
Yucca 'Green Mystery' or 'Mysterious Green', unpublished name by --, Germany.
Yucca guatemalensis Baker (1872) = Yucca elephantipes Regel
Yucca harmonii Jim Boehmke, Cactus specialties plant list (2001). (Little Valley, UT, 3"Ø) = ?
Yucca hanburii Baker (1892)
Yucca harrimaniae Trelease in Annual Rep. Missouri Bot. Gard. 13: 59, (1902)
Yucca harrimaniae McKelvey, in Yuccas southwest. U.S. 2: 139, (1947) ( in part ) = Yucca harrimaniae var. neomexicana
Yucca harrimaniae var. gilbertiana Trelease, Annual Rep. Missouri Bot. Gard. 18: 225, (1907) = Yucca harrimaniae ssp. gilbertiana
Yucca harrimaniae ssp. gilbertiana (Trelease) Hochstaetter, Yucca In the Southwest and Midwest of the USA and Canada, vol. 1: 36. (2000)
Yucca harrimaniae ssp. gilbertiana forma minor Hochstaetter seed list (2000)
Yucca harrimaniae var. neomexicana (Wooton & Stanley) Reveal, (1977) = Yucca harrimaniae var. neomexicana
Yucca harrimaniae var. neomexicana (Wooton & Standley) Hochstaetter, Cactaceae-Review IRT 1 (2): 21 (1998)
Yucca harrimaniae var. sterilis Neese & Welsh Great Basin Naturalist 45(4): 789-790 (1986) = Yucca harrimaniae ssp. sterilis
Yucca harrimaniae ssp. sterilis (Neese & Welsh) Hochstaetter, Cactaceae-Review IRT 1 (2): 21 (1998)
Yucca haruckeriana Cranzt (1768)  = Yucca aloifolia
Yucca horrida Humboldt ex. Steudel (1840)
Yucca howardsmithii Trelease (1937).
Yucca hystrix, Carl Sprenger (1920), Hybrid of Yucca flaccida,  Yucca filamentosa, Yucca recurvifolia or Yucca gloriosa
Yucca integerrima Stokes, Bot. Mag. Med. 2: 267 (1812)
Yucca intermedia McKelvey, Yucca S.W.U.S. 2:116 (1947) = Yucca baileyi ssp. intermedia
Yucca intermedia var. ramosa McKelvey 1947, in McKelvey, Yucca S.W.U.S. 2:116 (1947) = Yucca baileyi
Yucca jaegeriana (McKelvey) L.W. Lenz, Aliso 24: 99 (2007)
Yucca jaliscana
Yucca jaliscensis Trelease CUSNH 23(1):92 (1920).
Yucca japonica BAKER, J. G. Linnean Society Bot. Journ. Vol.. 18:225 (1881) as syn to Y. recurvifolia
Yucca johnstoniana Nomen nudum = Yucca linearifolia, or maybe a hybrid with this species? The name is a catalog name from Winco in Netherlands.
Yucca kanabensis McKelvey, (1947) = Yucca angustissima ssp. kanabensis
Yucca 'Karlson'  Benny Møller Jensen, 2006 (Name not published yet!). F:2 = seedling from Yucca 'Karlsruhensis'!
Yucca karlsruhensis Hort, hybrid by Graebener (1899), (Yucca flaccida x glauca)
Yucca "Karlsruhensis Type 2", unpublished name for at Yucca from Zagreb botanical garden, name suggested by P.C.O. Nørgaard, maybe a sibling to Yucca xkarlsruhensis.
Yucca lacandonica Gómez-Pompa & Valdés (1962) Bol. Soc. Bot. México 27: 43-44.
Yucca lacondica
Yucca laevigata Hort, BAKER, J. G., Peacock  Linnean Society Bot. Journal. Vol. 18:221 (1881)

Yucca 'Lemon Drop' unknown species or origin, Australia 2007
Yucca lenneana Baker.  Journal. Linn. Soc., Bot. 14: 538 (1875). = Yucca elephantipes
Yucca 'Licida', hybrid by J. B. Deleui (s.a.)
Yucca linearifolia CLARY, Brittonia 47 (4) pg. .394-396 (1995)
Yucca linearifolia 'Dusky Blue', A Cistus introduction www.cistus.com
Yucca linearifolia 'Line Dance' (2013), Avaliable at www.plantdelights.com introduced by Hans Hansen, the very well known Hosta breeder.
Yucca linearis (Trelease) FERGUSON, D. J. , Cact. & Succ. Journal. Amer. 68 (3): 130-133, 5 figs. (1996) = Yucca linearifolia
Yucca lineata Hort Baker  name occur in Linnean society Bot. Journal. Vol 18:221 (1881)
Yucca longiflora Buckley., in Phil. Acad. Sci. Roc. pg. 8, (1863) = Yucca treculeana
Yucca longifolia Karwinsky ex. Schultes fil. (1830) =  Nolina longifolia
Yucca louisianensis Trelease. in Mo. Bot. Gard. Ann. Rpt. 13:64 (1902) = Yucca arkansana ssp. louisianensis
Yucca louisianensis Trelease. in Mo. Bot. Gard. Ann. Rpt. 13:64 (1902) (in part) = Yucca constricta
Yucca louisianensis 'Granted Wish', name seen on the website of Plant Delights Nursery, Inc.)
Yucca louisianensis 'Desoto Blue' (Plant Delights Nursery, Inc.)

Yucca louisianensis var. paniculata. = Yucca arkansana ssp. louisianensis
Yucca 'Luna', Carl Sprenger (1920), hybrid of Yucca flaccida glaucescens xrecurvifolia
Yucca lutea, Hort Baker  Linnean Society Bot. Journal. Vol. 18:221 (1881)
Yucca lutescens Carriere  Revue Horticole 7: 579 (1858)= Yucca rupicola Scheele
Yucca macrocarpa Sargent in Gard. and Forest 8:305 (1895) (nom. illeg. Art. 53.1) = Yucca faxoniana
Yucca macrocarpa Engelmann (1881)
Yucca macrocarpa (Torr.) Merriam, in N. Amer. Fauna 7:358 (Name only) (1893); Cov., U.S. Natl. Herbarium Contrib. 4:202 1983 = Yucca torreyi orYucca schidigera ?
Yucca madrensis GENTRY, H.S., The Agave Family in Sonora, USDA Agri. Handbook No. 399:159-161, fig. 62 1972
Yucca "Marcel grex", hybrid of Yucca 'Bright Edge' x thompsoniana. Made by Sascha Svatek, Germany in 2006.
Yucca mazelii Hort. ex W. Watson (1889)  = Yucca elephantipes
Yucca meldensis Engelmann = Yucca flaccida
Yucca mexicana Hort, Baker in Linnean Society Bot. Journal. Vol. 23:4 (1881) as syn of Yucca flexilis Carriere
Yucca mexicana Sessé & Mociño (1894) (nom. illeg. Art. 53.1 ?!)
Yucca mixtecana García-Mendoza Acta Bot.  Mex. 42:1-4, Ills. (1998)
Yucca mohavensis Sarg., Gard. and Forest ) 9:104 1896 = Yucca schidigera Roezl ex Ortgies.
Yucca mollis (Engelmann) Cockerell, Nature 69: 198 (1903)= Yucca arkansana
Yucca 'Moloniana', Hort, hybrid by Willy Müller.
Yucca mooreana Hort. Peacock ex Baker (1880) = Yucca elephantipes
Yucca nana  Hochstätter, in  Succulenta 77 (2):71-74 1998
Yucca navajoa Webber 1945, in Mandroño 8:105 1945 = Yucca baileyi
Yucca necopina Shinners, (Glen Rose yucca) Endemic to Somervell County Texas
Yucca neomexicana Wooton. & Standley, Conrt. U.S. Natl. Herb. 16: 115 (1913) = Yucca harrimaniae var. neomexicana
Yucca newberryi McKelvey, in Yuccas Southwest. 2: 49. 1947 = Yucca whipplei ssp. newberryi
Yucca nitida W. Watson (1906)
Yucca obliqua Haworth, Suppl. Pl. Succ. 37  (1819)
Yucca obliqua Reg.
Yucca orchioides Trelease
Yucca orchioides Carriere, Revue Horticole 1861: 370, fig. 89-90(1861) = Yucca flaccida
Yucca orchioides var. major Baker, Curtis's Bot. Mag. 103: t.6316 (1887) = Yucca flaccida
Yucca pallida, MCKELVEY, S., Yuccas Southwest. 2: 57-63.1947
Yucca pallida var. endentata
Yucca parmentieri Hort. ex.  Carriere (1859) =  Yucca aloifolia
Yucca parmentieri Roezl. = Furcreae bedinghausii
Yucca parmentieri Ortigies (1859) = Furcreae bedinghausii
Yucca parviflora Torrey, in Emory, U.S. and Mex. Bound. Bot. pg. 221, (1859) =  Hesperaloe parviflora
Yucca ' Passiflora ' Hort =  hybrid  by Carl Sprenger   Yucca filamentosa x Yucca recurvifolia
Yucca patens Andre, Illustr. Hortic. 17: 120 (1870)
Yucca peacockii Baker, Journal. Linn. Soc. Bot. 18: 223 (1880)
Yucca peacockii 'Variegata', RBGE Living Collections Search Results
Yucca pendula Groenland, Revue Horticole 7: 433, fig. 128 (1858)= Yucca recurvifolia
Yucca pendula 'Tito Branca', Monksilver online catalog 2003. Probably a distinct clone of Yucca recurvifolia originates from Georgia U.S.A.found in 1986 as a seedling.

Yucca peninsularis MCKELVEY, Yuccas southwest. U.S. 2:52 (1947)
Yucca periculosa Baker Gard. Chron. 1870: 1088 (1870)
Yucca pitcairnifolia Karwinsky ex G. Don in Sweet, Hort. Brit. ed. III. 707 (1839), nomen (Quid ?)
Yucca plicata Hort. ex C. Koch Dendrol. ii. II. 345 = Yucca gloriosa
Yucca plicatilis Hort. ex C. Koch  Dendrol. ii. II. 345= Yucca gloriosa
Yucca polyphylla Baker in Gard. Chron. (1870) 1088 = Yucca constricta
Yucca potosina Rzedowski, Ciencia (Mexico) 15: 90, fig. 2. 1955, San Luis Potosi, Mexico
Yucca puberula sensu Torrey, non Haw., in Emory, U.S. Mex. bound. Bot. pg. 221, 1859 ( in part , not Haworth 1828 ) = Yucca arizonica
Yucca puberula Haworth, Phil. Mag. (ser. 2) 3: 186 (1828), non Torrey = Yucca flaccida
Yucca pulchra, Carl Sprenger 1920, hybrid of  Yucca flaccida, Yucca filamentosa, Yucca recurvifolia or Yucca gloriosa
Yucca pringlei Greennamm (1898) =  Furcreae bedinghausii
Yucca pruinosa Baker, Gard. Chron. (ser. 2) 30: 1122 (1870)
Yucca purpurea Hort. ex. Baker (1880) = Yucca aloifolia
Yucca quadricolor, Hort, Baker in Linnean Society Bot. Journ. Vol. Vol 18 (1881) = Yucca aloifolia
Yucca queretaroensis Piña, Lujan, Cact. Succ. Mex. 34: 51-56(1989)
Yucca radiosa (Engelmann 1892) Trelease Annual Rep. Missouri Bot. Gard. 13:56, (1902) = Yucca elata
Yucca recurvifolia Salisbury  (it's a probable natural  hybrid of Y. flaccida X Y. gloriosa or Y. aloifolia X Y. filamentosa)
Yucca recurvifolia Park and Cemetery. 11:184 f. = Yucca filamentosa
Yucca recurvifolia marginata (yellow edge). (variegated)
Yucca recurvifolia glauca
Yucca recurvifolia 'Banana Split' (R) (variegated) = Yucca recurvifolia 'Monca' PP14616, introduced and produced by Monrovia Nursery. (variegated).
Yucca recurvifolia 'Cousin It', name seen on the website of Plant Delights Nursery, Inc.
Yucca recurvifolia 'Dolomiten'
Yucca recurvifolia 'Gold Ribbons' (variegated) it was either introduced  by Terra Nova Nurseries, Oregon, USA. or it was introduced by Sean Hogan of Cistus Nursery in Sauvie Island, Oregon USA?
Yucca recurvifolia 'Golfstream' Sean Hogan (online catalog 2007)

Yucca recurvifolia 'Grubenlampe'
Yucca recurvifolia 'Grüner Mutant' (was Yucca SW-09-002R), introduced by Sascha Weissbeck, Germany.
Yucca recurvifolia 'Hinvargas' PP12192, (variegated)
Y. recurvifolia 'Lemon Sun', (variegated) introduced by Sascha Weissbeck, Germany.
Yucca recurvifolia 'Lothringen'
Yucca recurvifolia 'Margaritaville' = Yucca recurvifolia 'Hinvargas' PP12192, (variegated)
Yucca recurvifolia 'Monca' PP14616 (variegated)
Yucca recurvifolia 'Red Bells', Name seen on Ebay August 2011, seller unknown, but located in Steinau, Germany.
Yucca recurvifolia 'Rheintal'
Yucca recurvifolia 'Schwarzwald'
Yucca recurvifolia glauca
Yucca recurvifolia variegata (variegated)
Yucca recurva Haworth Syn. Pl. Succ. 69 (1812)

Yucca 'Relles'
Yucca reverchoni Trelease, Missouri Bot. Gard. Ann. Rpt. 22: 102. (1911)
Yucca rigida (Engelmann) Trelease, Missouri Bot. Gard. Ann. Rpt. 13: 65 - 67 (1902)

Yucca 'Red Rover' Accidental hybrid of Yucca rostrata x possible rigida, (Plant Delights Nursery, Inc.)
Yucca 'Rigmor'.  (variegated) breed by Martin R. Tversted, Denmark.
Yucca roberti, BUREAU. Fossil species that was found in Paris Basin.
Yucca roezlii Hort. ex W. Watson (1889)  = Yucca elephantipes
Yucca rostrata Engelmann ex Trelease, in Mo. Bot. Gard. Ann. Rpt. 13: 68. 1902.
Yucca rostrata Engelmann ex Trelease, in Mo. Bot. Gard. Ann. Rpt. 13: 68. 1902. (in part) = Yucca thompsoniana
Yucca rostrata forma integra Trelease, in Mo. Bot. Gard. Ann. Rpt. 22: 102, 1911 = Yucca rostrata
Yucca rostrata var. linearis, TRELEASE Rep. MO. Bot. Gard. 18:226, 1907 = Yucca linearifolia CLARY
Yucca rostrata 'Blue Swan', name seen on the spanish nursery website: www.viveroscanos.com

Yucca rostrata Sapphire Skies’, A Cistus introduction www.cistus.com, this form were found in the early 1990's by Sean Hogan in Northern Mexico.
Yucca rubra hort. ex. Lavallée (1877)
Yucca rufocinta Haworth, Suppl. Pl. Succ. 37 (1819)
Yucca rupicola Scheele, Linnea, 23:143 (1850)
Yucca rupicola Scheele, Linnea, 23:143 (in part) (1850) = Yucca reverchoni Trelease
Yucca rupicola Trelease, Missouri Bot. Gard. Ann. Rpt. 13: 67 (in part) (1902) = Yucca reverchoni Trelease
Yucca rupicola var. pallida
Yucca rupicola var. rigida Engelmann, in Trans. Acad. St. Louis. 3:49 (1873) (in part) = Yucca thompsoniana Trelease
Yucca rupicola var. rostrata
Yucca rupicola var. rupicola
Yucca rupicola var. thompsoniana, Engelmann,  Trans. Acad. Sci. St. Louis, 3:48 (1873) = Yucca rupicola Scheele
Yucca rupicola tortifolia ENGELMANN, G., Trans. Acad. Sci. St. Louis, 3:48 (1873) = Yucca rupicola Scheele
Yucca 'Samsø' = Yucca 'Danica'.
Yucca samuela = unvalid name for either Yucca carnerosana or Yucca faxoniana!
Yucca scabrifolia Baker (1870) = Yucca baccata
Yucca schidigera Roezl ex Ortgies 1871
Yucca schottiiEngelmann, in Acad. Sci. St. Louis Trans. (1873) 3:46 1878
Yucca schottii 'Chiricahua High', name seen on Cistus nusery's plantlist www.cistus.com
Yucca schottii var. jaliscensis
Yucca schottii var. madrensis
Yucca schottii var. schottii
Yucca semicylindrica Baker, Gard. Chron. (ser. 2) 30: 1217 (1870)
Yucca serratifolia Karw. ex Schult. f. = Dasylirion serratifolium
Yucca serrulata, HAWORTH, Synopsis Plantarum  Succulentarum suppl. 32:75  (1819)  = Yucca aloifolia
Yucca smalliana Fernald = Yucca filamentosa ssp. smalliana
Yucca smalliana 'Bright Edge' (Plant Delights Nursery, Inc.) = Yucca ? 'Bright Edge'
Yucca spinosa H.B.K., Nov. Gen. 1:289 (synonym for Dasylirion crotricha )
Yucca spinosa Knuth (1822)
Yucca 'Srengerii', Hort, hybrid by Willy Müller.
Yucca standleyi McKelvey (1947) = Yucca baileyi Wooton & Standley
Yucca stenophylla Hort, Baker in Linnean Society Bot. Journ. Vol. 23:4 (1881) as syn of Yucca flexilis Carriere  = Yucca aloifolia
Yucca stenophylla Steudel (1840)
Yucca stricta Sims = Yucca glaucassp. stricta
Yucca superba Roxburgh, Hortus Bengalensis, or a catalogue . . .25. (1814). = Furcraea tuberosa (Miller) W. T. Aiton
Yucca superba Haworth, Suppl. Pl. Succ. 36  (1819)
Yucca tenuifolia, Hort, Baker in Linnean Society Bot. Journ. Vol. 18:221 (1881) = Yucca aloifolia
Yucca tenuistyla Trelease, in Mo. Bot. Gard. Ann. Rpt. 13:53(1902) (in part) = Yucca constricta
Yucca thompsoniana Trelease, Mo. Bot. Gard. Ann. Rpt. 22:101, 1911
Yucca 'thompsonifolia HORT, (2002) in Yucca II, Hochstätter hybrid (Yucca thompsoniana x Yucca recurvifolia).
Yucca thornberi  McKelvey in Jour. Arnold. Arb. 16:268,t 138 (1935)  = Yucca baccata ssp. thornberi
Yucca toftiae Welsh, Utah plant novelties in Astragalus and Yucca, Great Basin Naturalist, Vol. 34, No. 4, 308-309, 1975, USA  = Yucca angustissima ssp. toftiae
Yucca tonelliana Hort  ex Koch (1863) = Furcrea bedinghausii
Yucca tonelliana Lemaire (1865)  (nom. illeg. Art. 53.1 ?!)
Yucca torreyi Shafer, in Britton & Shafer, N. Amer. Trees, pg. 157 fig. 117, 1908
Yucca torreyi forma. parviflora McKelvey in Yuccas Southwest U.S. 1:112, 1938 = Yucca torreyi
Yucca tortifolia Lindheimer ex Torr.,  in Bot. Mex. Bound. 221 = Yucca rupicola
Yucca tortulata Baker, Gard. Chron. (ser. 2) 30: 1122 (1870) = Yucca gloriosa
Yucca tortilis Hort. ex Carr.  in Rev. Hortic. Ser. IV. vii. (1858) 579 = Yucca rupicola
Yucca tortilis, Hort, Carl SprengerhybridYucca flaccida x Yucca aloifolia
Yucca treculeana Carriere, in Rev. Hortic. Ser. Iv. vii. (1858) 580; et ex Herincq, Hortic. Franc. (1864)235. t. 16.
Yucca treculeana var. canaliculata (Hook) Trelease, in Mo. Bot. Gard. Ann. Rpt. 13:97 pl. 53-541902 = Yucca treculeana
Yucca treculeana var. macrocarpa
Yucca treculeana var. succulenta McKelvey, Yuccas Southwest U.S. 80, pls. 37, 38, 39. 1938
Yucca treleasei Macbride, in Grey Herbarium, Harvard Univ., Contrib. 56:15, 1918 =  Yucca arizonica
Yucca Treleasei Carl Sprenger 1901, hybrid  =  Yucca X Treleasei
Yucca tricolor Hort. ex Baker  in Journal. Linn. Soc. xviii. (1880) 221 = Yucca aloifolia
Yucca Thusnelda, Carl Sprenger 1920, hybrid of Yucca treculeana canaliculata,recurvifolia or gloriosa
Yucca undulata, Martius
Yucca undulata Hort. ex Carr. n Rev. Hortic. Ser. IV. vii. (1858):580 = Yucca treculeana
Yucca utahensis, McKelvey, Yuccas Southwest. U.S. pt. 2: 94, tab. 32-34. (1947) = Yucca elata ssp. utahensis
Yucca valida Brandegee, Roc. Calif. Acad. Sci. ser. 2, 2: 208, pl. 11. 1889
Yucca var. Danica, SYDOW, G., Kaktus 12(2):34 1977, Yucca (Liliaceae)
Yucca verdiensis McKelvey, Yuccas Southwest. U.S. pt. 2: 98, tab. 35. (1947) = Yucca elata ssp.verdiensis
Yucca vespertina (McKelvey) Welsh, S.L,  in Rhodora, 95(883-884): 417 (1993): = Yucca baccata var. vespertina
Yucca ' Victor Emmanuel II ', hybrid by Carl Sprenger = Yucca 'Vittorio Emanuele II'
Yucca 'Vittorio Emanuele II', hybrid by Carl Sprenger  (Link to photo outside bennyskaktus.dk)
Yucca Virginia Plukenet, Almag. Bot. 396 (1696)  = Yucca filamentosa
Yucca xvomerensis Sprenger (s.a.)
Yucca 'Williamsiana', Hort, hybrid by Willy Müller.
Yucca whipplei Torrey, in Emory, U.S. and Mex. Bound. Bot. pg. 222, 1859
Yucca whipplei McKelvey, (1947) (solitary plants!!) = Yucca whipplei
Yucca whipplei McKelvey (1947) (caespitose plants!!) = Yucca whipplei ssp. caespitosa
Yucca whipplei ssp. caespitosa (M. Jones) Haines, in Madroño 6:43. 1942
Yucca whipplei ssp. eremica Epling & Haines, Brittonia 9(3):171-172. 1957
Yucca whipplei ssp. intermedia Haines, in Madroño 6: 43, 1942
Yucca whipplei ssp. newberryi (McKelvey) Hochstaetter, Succulenta 79(1):32-44. 2000
Yucca whipplei ssp. parishii (Jones, M. E.) Haines, in Madroño 6: 44. 1941 = Yucca whipplei
Yucca whipplei ssp. percursa Haines, in Madroño 6; 43 1942
Yucca whipplei ssp. typica Haines, in Madroño 6: 44, 1941 = Yucca whipplei
Yucca whipplei var. caespitosa M. Jones, Contr. W. Bot. no. 15: 59. 1929  = Yucca whipplei ssp. caespitosa
Yucca whipplei var. eremica, Mesa Garden seed list 19??
Yucca whipplei var. intermedia (Haines) Webber, Agric. Monogr. U.S.D.A. 17: 34. 1953  = Yucca whipplei ssp. intermedia
Yucca whipplei var. parishii M. Jones, in West. Bot. Contrib. 15: 59,1929 = Yucca whipplei
Yucca whipplei var. percursa (Haines) Webber Agric. Monogr. U.S.D.A. 17: 35. 1953 = Yucca whipplei ssp. percursa
Yucca whipplei var. velicata
Yucca X Ada, Carl Sprenger 1920, hybrid of Yucca filamentosa x aloifolia
Yucca X Adenophora, Carl Sprenger 1920, hybrid of Yucca aloifolia x filamentosa
Yucca X albella, Carl Sprenger 1920, hybrid of  Yucca filamentosa x gloriosa
Yucca X aletrodes, Carl Sprenger 1920, hybrid of Yucca rupicola x gloriosa
Yucca X Alexandrae, Carl Sprenger 1920, hybrid of Yucca filamentosa x aloifolia
Yucca X amabilis, Carl Sprenger 1920, hybrid of  Yucca flaccida glaucescens x recurvifolia
Yucca X amonea, Carl Sprenger 1920, hybrid of  Yucca flaccida x rupicola
Yucca xandreana , hybrid by J. B. Deleui (s.a.)
Yucca X Atropos, Carl Sprenger 1920, hybrid of  Yucca flaccida x rupicola
Yucca X Augusta, Carl Sprenger 1920, hybrid of  Yucca flexilis x filamentosa
Yucca X Aurora, Carl Sprenger 1920, hybrid of  Yucca filamentosa x recurvifolia
Yucca xbaccatissima (baccata x angustissima?) Natural hybrid , fh 1188.67  Hochstätter supplement seedlist July 2010.
Yucca xbacsoniana (baccata x thompsoniana) Natural hybrid , Hochstätter 2008.
Yucca xbaylissima (baileyi x angustissima), Natural hybrid , Utah,  Hochstätter supplement seedlist July 2010.
Yucca x Barmensis invalid cultivar-name for a hybrid  of (gloriosa x recurvifolia) x linearifolia. Made by Michael Lorek, Germany.
Yucca X bicolor, Carl Sprenger 1920, hybrid of  Yucca filamentosa media x gloriosa
Yucca X Boissieri, Carl Sprenger 1920, hybrid of Yucca filamentosa x aloifolia
Yucca X caelestis, Carl Sprenger 1920, hybrid of Yucca flaccida glaucescens x recurvifolia
Yucca X campanulata, Carl Sprenger 1920, hybrid of Yucca flaccida glaucescens x recurvifolia
Yucca X candida, Carl Sprenger 1920 hybrid of , Yucca filamentosa x gloriosa
Yucca X Candolleana, Carl Sprenger1920, hybrid of Yucca aloifolia x flaccida
Yucca xcarrierei, hybrid by J. B. Deleui (s.a.)
Yucca xcarrierei Andre (1895)
Yucca X Casertana, Carl Sprenger 1920, hybrid of Yucca aloifolia x flexilis
Yucca X Ceres, Carl Sprenger 1920, hybrid of  Yucca filamentosa x recurvifolia
Yucca X Colombiana, Carl Sprenger 1920, hybrid of Yucca flaccida glaucescens x gloriosa
Yucca X columnaris, Carl Sprenger 1920, hybrid of Yucca aloifolia x flaccida
Yucca xconsana (constricta x arkansana), Natural hybrid , Texas,  Hochstätter supplement seedlist July 2010.
Yucca X Cybele, Carl Sprenger 1920, hybrid of  Yucca filamentosa media x recurvifolia
Yucca X Darwinii, Carl Sprenger 1920, hybrid of  Yucca gloriosa plicata x recurvifolia
Yucca X Diana, Carl Sprenger 1920, hybrid of Yucca treculeana canaliculata X Yucca recurvifolia = Yucca treculeana x Yucca recurvifolia)
Yucca X Dohrnii, Carl Sprenger 1920, hybrid of  Yucca filamentosa x aloifolia
Yucca x dracaenoides, hybrid by J. B. Deleui (s.a.)
Yucca X Draco, Carl Sprenger 1920, hybrid of  Yucca flaccida x aloifolia
Yucca X Dux Carl Sprenger 1920, hybrid of  Yucca gloriosa robusta x flaccida
Yucca X Elwesiana, Carl Sprenger 1920, hybrid of  Yucca treculeana canaliculata X Yucca recurvifolia (= Yucca treculeana x Yucca recurvifolia )
Yucca X elegantissima, Carl Sprenger 1920, hybrid of Yucca Yucca filamentosa media x gloriosa = Yucca 'Elegantissima'
Yucca X elmensis ('St. Elmo'), Carl Sprenger 1920, hybrid of  Yucca filamentosa media x gloriosa
Yucca X Engelmanii, Carl Sprenger 1920, hybrid of Yucca filamentosa xgloriosa
Yucca X ensata, Carl Sprenger 1920, hybrid of  Yucca filamentosa x gloriosa
Yucca xensifera, hybrid by J. B. Deleui (s.a.)
Yucca X Europa, Carl Sprenger 1920, hybrid of  Yucca aloifolia x gloriosa
Yucca X exsultans, Carl Sprenger 1920, hybrid of Yucca filamentosa x recurvifolia
Yucca X fastuosa, Carl Sprenger 1920, hybrid of  Yucca aloifolia x filamentosa
Yucca X Federicus Cäsar, Carl Sprenger 1920, hybrid of  Yucca filamentosa x recurvifolia
Yucca xfeeanoukiae (harrimaniae x harrimaniae ssp. gilbertiana), Natural hybrid , Northern Utah 1900-2000m. Hochstätter supplement seedlist July 2010.
Yucca X floribunda, Carl Sprenger 1920, hybrid of Yucca filamentosa xgloriosa = Yucca 'Floribunda'
Yucca x floribunda
, hybrid by J. B. Deleui (s.a.), should be different from “Sprenger floribunda” by forming large trunks?
Yucca X Fosterana, Carl Sprenger 1920, hybrid of Yucca treculeana canaliculata X Yucca recurvifolia (= Y. treculeana x Y. recurvifolia )
Yucca X formosa, Carl Sprenger 1920, hybrid of  Yucca flaccida glaucescens x gloriosa
Yucca X formosissima, Carl Sprenger 1920, hybrid of Yucca flaccida glaucescens x gloriosa
Yucca X fulgens, Carl Sprenger 1920, hybrid of Yucca filamentosa media x recurvifolia
Yucca X Gaea, Carl Sprenger 1920, hybrid of Yucca flaccida x flexilis
Yucca xglaucissima (glauca x angustissima), Natural hybrid , New Mexico,  Hochstätter supplement seedlist July 2010..
Yucca X grandis, Carl Sprenger 1920, hybrid of  Yucca flexilis x recurvifolia
Yucca x gracillima, hybrid by J. B. Deleui (s.a.)
Yucca X grasilis, Carl Sprenger 1920, hybrid of  Yucca flaccida glaucescens x recurvifolia
Yucca X Heliodorus, Carl Sprenger 1920, hybrid of Yucca aloifolia gigantea x recurvifolia
Yucca X Helios, Carl Sprenger 1920, hybrid of  Yucca aloifolia x flexilis
Yucca X Imperator, Carl Sprenger 1920, hybrid of Yucca filamentosa media x recurvifolia
Yucca X imperialis, Carl Sprenger 1920, hybrid of Yucca filamentosa media x recurvifolia
Yucca xintermediate (arkansana x campestris) Natural hybrid , Texas,  Hochstätter supplement seedlist July 2010.
Yucca X Ismene, Carl Sprenger 1920, hybrid of  Yucca aloifolia x filamentosa
Yucca xjuncea, hybrid by J. B. Deleui (s.a.)
Yucca X karlsruhensis  hybrid by Graebner 1903 Yucca 'Karlsruhensis'
Yucca xkeithii (elata x constricta), Natural hybrid , Central Texas. Hochstätter supplement seedlist July 2010.
Yucca X Klotho, Carl Sprenger 1920 hybrid of , Yucca filamentosa media x recurvifolia
Yucca X Koelleana, Carl Sprenger 1920, hybrid of Yucca filamentosa media x recurvifolia
Yucca X lanceolata, Carl Sprenger 1920, hybrid of Yucca filamentosa x recurvifolia
Yucca X Lachesis, Carl Sprenger 1920, hybrid of  Yucca filamentosa x recurvifolia
Yucca x leavigata, hybrid by J. B. Deleui (s.a.)
Yucca X Lawrensceana, Carl Sprenger 1920, hybrid of  Yucca treculeana canaliculata X Yucca recurvifolia (= Y. treculeana x Y. recurvifolia )
Yucca X liliacea, Carl Sprenger 1920, hybrid of  Yucca filamentosa x rupicola
Yucca X linearis, Carl Sprenger 1920, hybrid of  Yucca aloifolia x filamentosa
Yucca X linifolia, Carl Sprenger 1920, hybrid of Yucca aloifolia x filamentosa
Yucca X luxurians, Carl Sprenger 1920, hybrid of Yucca gloriosa longifolia x flaccida
Yucca X luxurians, Carl Sprenger 1920, hybrid of  Yucca flaccida gloriosa longifolia
Yucca X Magnolia, Carl Sprenger 1920, hybrid of  Yucca filamentosa x recurvifolia
Yucca X margaritacea, Carl Sprenger 1920, hybrid of Yucca filamentosa xgloriosa
Yucca X Mariea, Carl Sprenger 1920, hybrid of  Yucca flaccida x aloifolia
Yucca xmassiliensis, hybrid by J. B. Deleui (s.a.)
Yucca X Milton, Carl Sprenger 1920, hybrid of  Yucca filamentosa media x recurvifolia
Yucca X micans, Carl Sprenger 1920, hybrid of  Yucca filamentosa x gloriosa
Yucca X Minerva, Carl Sprenger 1920, hybrid of  Yucca treculeana canaliculata x gloriosa (= Yucca treculeana x Yucca gloriosa)
Yucca X Moraea, Carl Sprenger 1920, hybrid of  Yucca filamentosa x gloriosa
Yucca × muelleri = Yucca aloifolia L. × constricta Buckley RBGE Living Collections Search Results
Yucca X Naudiniana, Carl Sprenger 1920, hybrid of Yucca aloifolia x gloriosa
Yucca X nebularis, Carl Sprenger 1920, hybrid of Yucca flaccida glaucescens x gloriosa
Yucca X Nicotrana, Carl Sprenger 1920, hybrid of Yucca gloriosa x filamentosa
Yucca X Oceanus, Carl Sprenger 1920, hybrid of  Yucca aloifolia x flaccida
Yucca xoklahomensis (glauca ssp. stricta x arkansana), Natural hybrid , Oklahoma,  Hochstätter supplement seedlist July 2010.
Yucca X paradoxa, Carl Sprenger 1920, hybrid of  Yucca flaccida x rupicola
Yucca X Parthenope, Carl Sprenger 1920, hybrid of Yucca filamentosa xgloriosa
Yucca X Passiflora, Carl Sprenger1920, hybrid of Yucca filamentosa media x recurvifolia
Yucca X peregrina, Carl Sprenger 1920, hybrid of Yucca filamentosa x recurvifolia
Yucca x pilosa, hybrid by J. B. Deleui (s.a.)
Yucca xpollyjeaniae (harrimaniae x glauca), Natural hybrid , Central Colorado 2350-2700m. Hochstätter supplement seedlist July 2010.
Yucca X preacox, Carl Sprenger 1920, hybrid of  Yucca filamentosa x gloriosa
Yucca X princeps, Carl Sprenger 1920, hybrid of  Yucca filamentosa x recurvifolia
Yucca X purpurascens, Carl Sprenger 1920, hybrid of Yucca filamentosa media x recurvifolia
Yucca X Psyche, Carl Sprenger 1920, hybrid of Yucca filamentosa x rupicola
Yucca X pygmaea, Carl Sprenger 1920, hybrid of  Yucca flaccida x aloifolia
Yucca X pyramidalis, Carl Sprenger 1920, hybrid of Yucca flaccida x aloifolia
Yucca xquinnarjenii (baileyi x baileyi ssp. intermedia), Natural hybrid , Northern New Mexico 1900-2000m. Hochstätter supplement seedlist July 2010.
Yucca X regalis, Carl Sprenger 1920, hybrid of  Yucca flexilis x flaccida glaucescens
Yucca X regia, Carl Sprenger 1920, hybrid of  Yucca filamentosa media x recurvifolia
Yucca X Rekowskiana, Carl Sprenger 1920, hybrid of Yucca filamentosa xgloriosa
Yucca X Rex, Carl Sprenger hybrid of Yucca gloriosa minor X Yucca filamentosa
Yucca X robusta, Carl Sprenger 1920, hybrid of  Yucca filamentosa x gloriosa
Yucca X Roland, Carl Sprenger 1920, Yucca flaccida x aloifolia
Yucca X Sanderana, Carl Sprenger 1920, hybrid of Yucca filamentosa media x recurvifolia
Yucca X Saturnus, Carl Sprenger 1920, hybrid of  Yucca filamentosa x flexilis
Yucca  xschotii Engelmann pro sp. (Lenz & Hanson 2000) = Yucca schottii
Yucca X Sieheana, Carl Sprenger 1920, hybrid of  Yucca aloifolia x flexilis
Yucca X smaragdina, Carl Sprenger 1920, hybrid of Yucca aloifolia x rupicola
Yucca X Sokrates, Carl Sprenger 1920, hybrid of  Yucca rupicola x recurvifolia
Yucca X stellaris, Carl Sprenger 1920, hybrid of Yucca flaccida x aloifolia
Yucca xstriatula, hybrid by J. B. Deleui (s.a.)
Yucca xsulcata, hybrid by J. B. Deleui (s.a.)
Yucca X superba, Carl Sprenger 1920, hybrid of  Yucca flexilis x recurvifolia
Yucca X Tenoreana, Carl Sprenger 1920, hybrid of Yucca filamentosa media x recurvifolia
Yucca X Theseus, Carl Sprenger 1920, hybrid of  Yucca flaccida x aloifolia
Yucca X tortilis, Carl Sprenger 1920, hybrid of  Yucca flaccida x aloifolia
Yucca X Treleasei, Carl Sprenger 1920, hybrid of Yucca filamentosa xrupicola
Yucca xtreleasei Sprenger(1901).
Yucca X Triton, Carl Sprenger 1920, hybrid of  Yucca filamentosa x gloriosa
Yucca X Titanus, Carl Sprenger 1920, hybrid of  Yucca aloifolia marginata x flexilis
Yucca X tulipfera, Carl Sprenger 1920, hybrid of Yucca filamentosa xaloifolia
Yucca X Victor Emmanuel II (Vittorio Emanuele II), Carl Sprenger 1920 hybrid of , Yucca aloifolia purpurea x recurvifolia  = Yucca 'Vittorio Emanuele II'
Yucca X victorialis, Carl Sprenger 1920, hybrid of Yucca filamentosa mediax recurvifolia
Yucca X Virgilius, Carl Sprenger 1920, hybrid of Yucca filamentosa media x recurvifolia
Yucca X virescens, Carl Sprenger 1920, hybrid of Yucca aloifolia x filamentosa
Yucca X viridiflora, Carl Sprenger 1920, hybrid of Yucca filamentosa x recurvifolia
Yucca X vomerensis, Carl Sprenger 1920, hybrid of Yucca aloifolia x gloriosa
Yucca X 'Vomerensis' Carl Sprenger, hybrid of Yucca gloriosa x Yucca aloifolia
Yucca 'Washington', Carl Sprenger 1920, hybrid of Yucca filamentosa xaloifolia
Yucca X Wilhelmi (Gugielmi), Carl Sprenger 1920, hybrid of  Yucca filamentosa x gloriosa
Yucca X Willmottiana, Carl Sprenger 1920, hybrid of Yucca filamentosa x recurvifolia
Yucca X Wittmackiana, Carl Sprenger 1920, hybrid of Yucca filamentosa media x recurvifolia
Yucca yucatana, Engelmann in Trans. Acad. Sci. St. Louis, 3:37(1873) = Yucca aloifolia
Yucca yucatana, Baker in Linnean Society Bot. Journal. Vol. 18:221(1881) = Yucca aloifolia

Yucca ‘Yugosta02’ (USPP24502 P3) Scheffers; Ruud (Honselersdijk, NL) (variegated) sport from Yucca guatemalensis Silver Star’.



Thanks to all those who has contributed with information, to this long list of Yucca names.


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