Chorizanthe robusta |
Chorizanthe sect. Ptelosepala |
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robust spineflower, Scotts Valley spineflower |
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Habit | Plants erect to spreading or decumbent, 0.5–3 × 0.1–6 dm, villous. | Plants prostrate to spreading or somewhat erect. | ||||
Stems | not disarticulating at each node. |
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Leaves | basal or nearly so; petiole 1–4(–7) cm; blade oblanceolate, 1.5–5 × 0.2–0.7(–1) cm, villous. |
blades lanceolate to ovate or spatulate. |
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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. |
bracts with or without awns. |
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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. |
cylindric, campanulate, or urceolate, occasionally ventricose basally, 3-angled, 6-ribbed, 6-toothed, with or without membranous or scarious margins continuous across sinuses; awns unequal, typically with anterior one longest. |
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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; perianth white, yellow, rose, red, maroon, dark purple, or lavender, thinly pubescent; stamens 3–9; filaments adnate at base of floral tube. |
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Achenes | light brown, globose-lenticular, 3.5–4 mm. |
light brown to dark brown, lenticular or globose-lenticular. |
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Chorizanthe robusta |
Chorizanthe sect. Ptelosepala |
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Distribution |
wc Calif
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w United States; nw Mexico |
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Species 31 (25 in the flora). (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. 451. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | C. section Anisogonum, C. section Eriogonellopsis, C. section Herbaceae | |||||
Name authority | Parry: Proc. Davenport Acad. Nat. Sci. 5: 176. (1889) | Nuttall: Proc. Acad. Nat. Sci. Philadelphia 4: 17. (1848) | ||||
Web links |