Chorizanthe robusta |
Chorizanthe corrugata |
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robust spineflower, Scotts Valley spineflower |
wrinkled spineflower |
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Habit | Plants erect to spreading or decumbent, 0.5–3 × 0.1–6 dm, villous. | Plants erect, 0.3–1.5 × 0.3–1 dm, thinly tomentose. | ||||
Leaves | basal or nearly so; petiole 1–4(–7) cm; blade oblanceolate, 1.5–5 × 0.2–0.7(–1) cm, villous. |
basal or nearly so; petiole 0.5–2(–3) cm; blade round-ovate, (0.5–)0.8–1.5(–2) × (0.3–)0.5–1.5(–2) cm, thinly floccose to tomentose. |
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Inflorescences | with secondary branches not suppressed except in terminal clusters of involucres, green to reddish; bracts 2, similar to proximal leaf blades only reduced, short-petiolate, becoming linear and aciculate at distal nodes, acerose, 1–5 cm × 2–5(–7) mm, awns absent. |
with involucres in small clusters 0.5–1 cm diam., green to tan or reddish; bracts 2, linear to linear-lanceolate, acicular, 2–7 cm × 1–2.5 mm, awns slightly curved, 0.5–1 mm. |
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Involucres | 1, greenish, cylindric, not ventricose, 2.5–4 mm, with white to pinkish, thin scarious margins restricted to basal portion of teeth, not corrugate, thinly pubescent abaxially; teeth spreading, equal, 0.3–0.8(–1) mm; awns uncinate with longer ones 0.7–1.3 mm and anterior one mostly 1–1.3 mm, these alternating with shorter (0.3–0.7 mm) ones. |
1, green to tan, cylindric, 3-angled but 3-ribbed, 3–4 mm, markedly transverse corrugate, glabrate; teeth 3, equal, 2–4.5 mm; awns uncinate, 0.6–1 mm. |
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Flowers | slightly exserted; perianth bicolored with floral tube white and tepals white to rose, cylindric, 2.5–4 mm, pubescent abaxially; tepals connate 1/4 their length, monomorphic, oblanceolate to narrowly oblong, usually truncate to rounded and erose or denticulate apically, occasionally distinctly cuspidate; stamens 9, included; filaments distinct, 2–3.5 mm, glabrous; anthers pink to red or maroon, oblong, 0.6–0.8 mm. |
1, included to slightly exserted; perianth white, cylindric, 2–2.5 mm, thinly pubescent abaxially; tepals connate ca. 2/3 their length, monomorphic, oblong, acute, entire apically; stamens 6, slightly exserted; filaments distinct, 0.8–1 mm, glabrous; anthers cream, ovate, 0.4–0.5 mm. |
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Achenes | light brown, globose-lenticular, 3.5–4 mm. |
brown, lenticular, 2.5–3 mm. |
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2n | = 38. |
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Chorizanthe robusta |
Chorizanthe corrugata |
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Phenology | Flowering Feb–May. | |||||
Habitat | Sandy to gravelly flats and slopes, mixed grassland, saltbush, creosote bush, and sagebrush communities | |||||
Elevation | -70-1000 m (-200-3300 ft) | |||||
Distribution |
wc Calif
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AZ; CA; NV; Mexico (Baja California, Sonora)
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Chorizanthe corrugata is found mainly in the Mojave and Sonoran deserts. The narrow, transversely corrugated involucral tube is diagnostic. Some anomalous flowers with four or eight stamens have been seen but this condition was always associated with other flowers bearing the normal number. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 5, p. 455. | FNA vol. 5, p. 468. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Acanthogonum corrugatum | |||||
Name authority | Parry: Proc. Davenport Acad. Nat. Sci. 5: 176. (1889) | (Torrey) Torrey & A. Gray: Proc. Amer. Acad. Arts 8: 198. (1870) | ||||
Web links |