Chorizanthe douglasii |
Chorizanthe stellulata |
|
---|---|---|
Douglas' spineflower, San Benito spineflower |
starlet spineflower, starlite spineflower |
|
Habit | Plants erect, 1–4(–5) × 0.5–3 dm, villous. | Plants erect, 0.5–2.5(–3) × 0.5–3 dm, hirsute. |
Leaves | basal; petiole 1–3(–6) cm; blade oblanceolate, 0.5–2(–4) × 0.1–0.4(–1) cm, villous. |
basal; petiole 0.1–0.5 cm; blade narrowly lanceolate to oblanceolate, 0.5–2 × 0.8–2(–2.2) cm, hirsute. |
Inflorescences | cymose, dichotomously branched throughout, white to greenish or reddish; bracts usually 2, similar to proximal leaf blades, typically with whorl of 3–5 ca. midstem, short-petiolate, becoming linear and aciculate at distal nodes, acerose, 0.5–2(–3) cm × 1–5(–10) mm, awns absent. |
cymose, dichotomously branched throughout, white to greenish or reddish; bracts usually 2, similar to leaves at proximal nodes only reduced, typically with whorl of 3–5 ca. midstem, short-petiolate, becoming linear and aciculate at distal nodes, acerose, 0.5–2(–3) cm × 10–30(–40) mm, awns absent. |
Involucres | congested in small leafy terminal clusters of 2–4 at nodes of dichotomies, greenish, cylindric, slightly ventricose basally, 3–5 mm, with conspicuous, purple, broad, membranous margins typically extending across sinuses, finely corrugated, hispid at least along ridges, otherwise sparsely pubescent; teeth spreading, equal, (0.7–)1–1.5 mm, awns straight, 0.5–1 mm. |
congested in small bracteated terminal clusters of 2–4 at node of dichotomies, tannish, cylindric, slightly ventricose basally, 3–4 mm, with conspicuous, white, broad, membranous margins typically extending up tooth to awn, finely corrugated, hispid at least along ridges, otherwise sparsely pubescent; teeth spreading, equal, 1–1.5 mm, awns straight, 0.5–1 mm. |
Flowers | exserted; perianth white to rose, cylindric, 3.5–4(–4.5) mm, slightly pubescent abaxially; tepals connate 2/3 their length, monomorphic, obovate, 2-lobed or denticulate apically, infrequently inner whorl entire; stamens 9, slightly exserted; filaments distinct, 3–4 mm, glabrous; anthers pink to red, oblong, 0.5–0.6 mm. |
exserted; perianth cream to creamy white or rose, cylindric, 4–4.5(–5) mm, slightly pubescent abaxially; tepals connate 2/3 their length, monomorphic, obovate, obcordate to 2-lobed apically, sometimes slightly irregular but not distinctly erose; stamens 9, slightly exserted; filaments distinct, 4–5 mm, glabrous; anthers pink to red, oblong, 0.5–0.6 mm. |
Achenes | light brown, globose-lenticular, 3.5–4 mm. |
light brown, globose-lenticular, 3.5–4.5 mm. |
2n | = 40. |
= 38, 40, 44. |
Chorizanthe douglasii |
Chorizanthe stellulata |
|
Phenology | Flowering Apr–Jul. | Flowering Apr–Jul. |
Habitat | Sandy to gravelly flats and slopes, mixed grassland communities, oak and pine woodlands | Sandy to gravelly flats and slopes, mixed grassland and chaparral communities, oak-pine woodlands |
Elevation | (200-)300-1600 m ((700-)1000-5200 ft) | 30-900 m (100-3000 ft) |
Distribution |
CA
|
CA
|
Discussion | Chorizanthe douglasii is restricted to the Santa Lucia Mountains and to the San Gabilan and La Panza ranges of west-central California. The species is infrequent but can be locally common. A single collection made in the Santa Cruz Mountains (Rowntree s.n., 16 Jun 1929, CAS) may have been made in Santa Cruz County, but the location is uncertain and no other collection is known from that region. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Chorizanthe stellulata can be locally common in the foothills bordering the Central Valley from Shasta County south to Stanislaus County on the western side, and to Tulare County on the eastern side. Post-flowering specimens of starlite spineflower and Douglas’s spineflower are sometimes difficult to distinguish. The margins of the involucre in the former are always white; those of C. douglasii are purple. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 5, p. 452. | FNA vol. 5, p. 452. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | C. nortonii | |
Name authority | Bentham: Trans. Linn. Soc. London 17: 418. (1836) | Bentham: in A. P. de Candolle and A. L. P. P. de Candolle., Prodr. 14: 26. (1856) |
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