Yucca elata ssp. utahensis:


Yucca elata ssp. utahensis (McKelvey) Hochstaetter, Cactaceae-Review, 1 (2):  21 (1998)

Synonyms:
Yucca utahensis McKelvey, Yuccas SW U.S.  2: 94-98, t.  32-34 (1947)
Yucca elata var. utahensis (McKelvey) Reveal, Intermountain Flora 6: 533-534 (1977)

Type location:
7-9 miles North West of St. George, in Santa Clara Valley, Washington Co., Utah.

Distribution:
In sandy soil, at 850 to 2200 m, in Southwestern Utah and Northwestern Arizona, and just in to southeastern Nevada.

Short description of the species:
Like Yucca elata ssp. elata but with a few differences:
Plants acaulescent or at most with short inconspicuous stems or procumbent stems 60 to 130 cm long, forming eventually extremely large clumps with a variable number of stems and rosettes of leaves. Leaves 17 to 70 cm long, 7 to 10 mm wide (or even from 4 and up to 20 mm wide) (near or above the middle), usually concavo-convex for greater part of length. Inflorescens proper branched for greater part of the length, racemose tip exceeding uppermost branchlets but not conspicuously long. Pistil 25 to 32 mm long. Fruit 50 to 57 mm long 20 to 25 mm wide, with thin or thick, strong wall, persistent, with smooth, pale tan epidermis (very similar to Yucca elata, but averaging slightly smaller). In habitat it flowers from April to early June.

Hardiness:
Not known, probably not very hardy.

Pictures:


Yucca  elata ssp. utahensis Smith's Mesa, Utah.
Photo by Craig Howe ©2000-2005
 


#781   Yucca elata ssp. utahensis, Nevada, Lincoln Co., 1600 m,  fh. 1178.4 sown 1997. Grown in 10 liter pot, stored inside the unheated greenhouse.
Photo by Benny Moeller Jensen ©1999-2005

My own plants:
#1056 Yucca elata ssp. utahensis, Nevada, Lincoln Co., fh 1178.18, sown 2000 (seeds from 1999!)
#1119 Yucca elata ssp. utahensis, Nevada, Lincoln Co., 1800 m,  fh 1178.4, sown 2000 (seeds from 1999!)
#781   Yucca elata ssp. utahensis, Nevada, Lincoln Co., 1600 m,  fh. 1178.4 sown 1997. Grown in 10 liter pot, stored inside the unheated greenhouse.

Reference:
REVEAL, Intermountain Flora 6:  533-534 (1977) Yucca elata var. utahensis (McKelvey) Reveal
HOCHSTAETTER, Cactaceae-Review IRT, Germany 1 (2):  21 (1998)
HOCHSTAETTER, F; (2000), YUCCA (vol. I): 49-50 (Yucca elata ssp. utahensis)
WEBBER, Agric. Monograph U.S.D.A. 17:62-65 (1953) (Yucca utahensis as a syn for Yucca glauca x Yucca elata)



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