Croton pottsii var. thermophilus |
Croton pottsii |
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desert leatherweed, leatherweed |
leatherweed, leatherweed croton |
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Habit | Herbs, perennial, 1–6 dm, monoecious or dioecious. | |||||
Stems | somewhat zigzag; erect radii of stellate hairs longer than lateral radii, thus pubescence appearing ± shaggy. |
several from base, sparsely branched distally, stellate-hairy. |
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Leaves | blades usually 1–1.4 cm. |
sometimes clustered near inflorescences; stipules rudimentary; petiole 0.5–2 cm, glands absent at apex; blade ovate-oblong, proximal rounder, distal more ovate-elliptic, 1–6 × 1–3 cm, base rounded, margins entire, apex rounded to acute, both surfaces pale to ashy green, softly stellate-hairy. |
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Racemes | mostly 0.5–0.9 cm. |
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Inflorescences | bisexual or unisexual, racemes, 0.5–2.5 cm, staminate and pistillate flowers each (12–)20–25. |
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Pedicels | staminate 1.5–6 mm, pistillate 1–3.5 mm, ± recurved in fruit. |
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Staminate flowers | sepals (4–)5, 1–1.5 mm, abaxial surface densely stellate-hairy; petals (4–)5, oblong-lanceolate, 1–1.3 mm, abaxial surface glabrous except margins villous; stamens 10–15. |
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Pistillate flowers | sepals 5, equal, 1.5–3 mm, margins entire, apex straight to slightly incurved, abaxial surface glabrous except stellate-hairy at apex; petals 0; ovary 3-locular; styles 3, 0.5–4.5 mm, 2-fid to base, terminal segments 6. |
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Styles | usually 0.5–1 mm. |
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Capsules | 4 mm. |
4–6(–7) × 4–5 mm, smooth; columella apex with 3 sharp projections. |
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Seeds | 3.5–4 × 2–2.5 mm, shiny. |
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2n | = 20. |
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Croton pottsii var. thermophilus |
Croton pottsii |
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Phenology | Flowering Jul–Oct. | |||||
Habitat | Basalt and limestone hills. | |||||
Elevation | 700–1800 m. (2300–5900 ft.) | |||||
Distribution |
TX; Mexico (Coahuila) |
AZ; NM; TX; n Mexico; c Mexico
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Discussion | Variety thermophilus is restricted to Brewster County and nearby Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). The affinities of Croton pottsii lie with C. lindheimerianus and C. monanthogynus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 12, p. 222. | FNA vol. 12, p. 221. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | C. corymbulosus var. thermophilus, C. thermophilus | Lasiogyne pottsii | ||||
Name authority | (M. C. Johnston) M. C. Johnston: SouthW. Naturalist 5: 171. (1960) | (Klotzsch) Müller Arg.: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 15(2): 561. (1866) | ||||
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