Chorizanthe leptotheca |
Chorizanthe cuspidata |
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Peninsular spineflower, Ramona spineflower |
San Francisco spineflower |
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Habit | Plants erect to spreading, 0.5–3(–3.5) × 0.5–3(–5) dm, thinly pubescent. | Plants decumbent to prostrate or ascending, 0.5–2(–2.5) × 0.5–10 dm, villous. | ||||
Leaves | basal; petiole 1–3(–4) cm; blade oblong to oblong-ovate, 0.5–2(–3) × 0.3–0.5(–0.7) cm, thinly pubescent adaxially, usually densely tomentose adaxially. |
basal; petiole (0.5–)1–3 cm; blade oblanceolate, (0.5–)1–5 × (0.3–)0.4–0.7(–1) cm, villous. |
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Inflorescences | mostly flat-topped and openly branched, usually reddish; bracts soon deciduous, 2, occasionally leaflike at proximal nodes and similar to proximal leaf blades only more reduced, short-petiolate, ovate, 0.3–0.4 cm × 2–3 mm, otherwise sessile, linear and acicular, often acerose, 0.1–0.3 cm × 0.7–1 mm, awns straight, 0.5–1 mm. |
rather dense with secondary branches suppressed, greenish to reddish; bracts 2, similar to proximal leaf blades only reduced, short-petiolate, becoming narrowly elliptic to linear-lanceolate and aciculate at distal nodes, acerose, 0.5–5 cm × 2–7 mm, awns 0.5–1.2 mm. |
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Involucres | in congested clusters with 1 at node of dichotomies, reddish, cylindric, not ventricose, 3–4 mm, not corrugate, without scarious or membranous margins, thinly pubescent; teeth spreading, unequal, 0.7–1.5 mm with longer of 3 longest ones more erect than 3 other shorter and less-prominent ones, awns uncinate, 0.5–1 mm. |
1, greenish, cylindric, often ventricose basally, 1–3 mm, without scarious margins or if so then white to pink, thin, and restricted to basal portions of teeth, corrugate, villous abaxially; teeth spreading, equal, 0.5–2 mm; awns uncinate or straight with longer ones 2–3 mm and anterior one mostly 2.5–3 mm, these alternating with shorter 1–1.5(–1.7) mm ones. |
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Flowers | long-exserted; perianth rose to red, infrequently with white lobes, cylindric, 4.5–6 mm, pubescent; tepals connate ca. 1/2 their length, dimorphic or sometimes monomorphic, narrowly oblanceolate, apex rounded, those of outer whorl slightly broader and occasionally longer than those of inner whorl; stamens 9, mostly included; filaments distinct, 4–6 mm, glabrous; anthers pink to red, ovate to oblong, 0.5–0.6 mm. |
included to slightly exserted; perianth bicolored with floral tube white and tepals white to rose, cylindric, 2–3 mm, pubescent abaxially; tepals connate less than 1/4 their length, monomorphic, oblong, truncate to 3-lobed and distinctly cuspidate apically; stamens 9, slightly exserted; filaments distinct, 2–3 mm, glabrous; anthers cream to rose, narrowly oblong, 0.3–0.4 mm. |
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Achenes | brown, lenticular, 3–4 mm. |
light brown, globose-lenticular, 2–3 mm. |
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2n | = 38. |
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Chorizanthe leptotheca |
Chorizanthe cuspidata |
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Phenology | Flowering May–Aug. | |||||
Habitat | Sandy to gravelly flats and slopes, grassland and chaparral communities, pine-oak woodlands | |||||
Elevation | (300-)600-1600(-1900) m ((1000-)2000-5200(-6200) ft) | |||||
Distribution |
CA; Mexico (Baja California)
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CA
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Discussion | Chorizanthe leptotheca is found in the foothills of the San Bernardino Mountains of San Bernardino County southward along the eastern edge of the Santa Ana Mountains, and through the San Jacinto and Santa Rosa mountains of Riverside County into the mountains of central San Diego County. The species is also found in north-central Baja California. Ramona spineflower is clearly related to Chorizanthe staticoides, but that species occurs to the west of the range of C. leptotheca and the two are not known to be sympatric. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 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. 463. | FNA vol. 5, p. 454. | ||||
Parent taxa | Polygonaceae > subfam. Eriogonoideae > Chorizanthe > subg. Amphietes > sect. Ptelosepala | Polygonaceae > subfam. Eriogonoideae > Chorizanthe > subg. Amphietes > sect. Ptelosepala | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | C. pungens var. cuspidata | |||||
Name authority | Goodman: Ann. Missouri Bot. Gard. 21: 61. (1934) | S. Watson: Proc. Amer. Acad. Arts 17: 379. (1882) | ||||
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