Hesperoyucca whipplei |
Hesperoyucca newberryi |
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chaparral yucca, our lord's candle |
Newberry's yucca |
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Habit | Plants monocarpic or polycarpic, sometimes rhizomatous, some with secondary rosettes at base or stems branching to form new rosettes after flowering; rosettes single or cespitose, in small to very large, compact or open communities, or occasionally solitary. | Plants monocarpic; rosettes single. |
Leaves | 20–90(–125) × 0.7–2 cm wide at base in narrow forms, 2–2.5 cm in broader forms. |
50–60 × 0.7–2 cm wide at base in narrow forms, 2–2.5 cm in broader forms. |
Scape | 0.9–3 m × 2.5–15 cm diam. near base. |
1.4–1.6 m × 10–14 cm diam. |
Inflorescences | 1 when rosette solitary, 1–many per rosette when rosettes in colonies, 2.5–28 × 1.5–7 dm at widest point. |
14–16 dm, 4–5.5 dm at widest point. |
Capsules | with conspicuous placental wings at maturity. |
with slight or inconspicuous placental wings at maturity. |
Hesperoyucca whipplei |
Hesperoyucca newberryi |
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Phenology | Flowering spring. | Flowering spring. |
Habitat | Desert, chaparral, desert woodland coastal sage | Desert, rocky granite, western slopes of Colorado River Canyon |
Elevation | 300–2500 m (1000–8200 ft) | 400–1300 m (1300–4300 ft) |
Distribution |
CA; Mexico (Baja California)
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AZ |
Discussion | Within Hesperoyucca whipplei, W. Trelease (1893) recognized two varieties, A. L. Haines (1941) and P. A. Munz (1959) each recognized five subspecies, and J. M. Webber (1953) recognized four varieties based on growth form. Others (S. D. McKelvey 1938–1947; K. K. McKinney and J. C. Hickman 1993) have argued that growth form in this species is highly variable, and have questioned the desirability of recognizing any infraspecific taxa at all in H. whipplei. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Hesperoyucca newberryi is found in Mohave County, in the vicinity of the Colorado River. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 26, p. 440. | FNA vol. 26, p. 441. |
Parent taxa | Agavaceae > Hesperoyucca | Agavaceae > Hesperoyucca |
Sibling taxa | ||
Synonyms | Yucca whipplei, H. whipplei var. graminifolia, Yucca californica, Yucca graminifolia, Yucca nitida, Yucca ortgensiana, Yucca whipplei subsp. caespitosa, Yucca whipplei var. caespitosa, Yucca whipplei subsp. intermedia, Yucca whipplei var. intermedia, Yucca whipplei subsp. parishii, Yucca whipplei var. parishii, Yucca whipplei subsp. percursa, Yucca whipplei var. percursa | Yucca newberryi, Yucca whipplei subsp. newberryi |
Name authority | (Torrey) Trelease: Rep. (Annual) Missouri Bot. Gard 4: 208. (1893) | (McKelvey) Clary: Sida 19: 845. (2001) |
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