Chorizanthe clevelandii |
Chorizanthe uniaristata |
|
---|---|---|
Cleveland's spineflower |
one-awn spineflower |
|
Habit | Plants spreading to decumbent, 0.2–0.8(–1) × 0.5–5(–7) dm, appressed-pubescent. | Plants spreading or ascending, 0.2–0.6(–0.8) × 0.5–4(–5) dm, appressed-pubescent. |
Leaves | basal; petiole 0.5–2 mm; blade oblanceolate, 0.5–1.5(–2) × 0.3–0.6(–0.8) cm, thinly pubescent. |
basal; petiole 0.5–2 cm; blade oblanceolate, 0.5–1.5(–2) × 0.2–0.8 cm, thinly pubescent. |
Inflorescences | with involucres in small, open clusters 0.5–1.5 cm diam., greenish or grayish to reddish; bracts 2, sessile, usually leaflike, oblanceolate to elliptic, 0.5–1.5 cm × 1.5–5 mm, gradually reduced and becoming scalelike at distal nodes, linear, aciculate, acerose, 0.4–1 cm × 1–2(–3) mm, awns straight, 1–3 mm. |
with involucres in small open clusters 0.5–1.5 cm diam., greenish to grayish or reddish; bracts 2, sessile, usually leaflike, oblanceolate to elliptic, 0.5–1.5 cm × 1.5–5 mm, gradually reduced and becoming scalelike at distal nodes, linear, aciculate, acerose, 0.4–1.2 cm × 1–2(–3) mm, awns straight, 1.5–4 mm. |
Involucres | 3–10, grayish to reddish, urceolate, slightly ventricose basally, 3–3.5 mm, slightly corrugate, without scarious or membranous margins, densely pubescent; teeth widely spreading to divergent, unequal, 0.3–0.6 mm or 3–6 mm; awns uncinate, unequal, with longer anterior one 1.5–2.5 mm, others spreading, 0.3–0.6 mm. |
3–10, grayish to reddish, urceolate, slightly ventricose basally, 2–3 mm, without scarious or membranous margins, slightly corrugate, densely grayish-pubescent; teeth widely spreading to divergent, unequal, 0.3–0.5 or 3–6 mm; awns straight or uncinate, unequal, with longer anterior one straight, 2.5–5.5 mm, others spreading, uncinate, 0.3–0.5 mm. |
Flowers | included or only slightly exserted; perianth bicolored with floral tube greenish white and tepals white, cylindric, 2.5–3 mm, sparsely pubescent; tepals connate 2/3 their length, dimorphic, linear-oblong, those of outer whorl spreading, 1.5 times longer than those of inner whorl, rounded, entire or emarginate to slightly 2-lobed apically, those of inner whorl erect, acute, entire to erose, slightly fimbriate or 2-lobed apically; stamens 3, included; filaments distinct, 2–2.5 mm, glabrous; anthers white, ovate, 0.3–0.4 mm. |
included or only slightly exserted; perianth bicolored with floral tube greenish white and tepals white, cylindric, 2–3 mm, sparsely pubescent; tepals connate 2/3 their length, dimorphic, linear-oblong, those of outer whorl spreading, narrowly oblong, 1.5 times longer than those of inner whorl, rounded but with minute cusp or 3 teeth apically, those of inner whorl erect to slightly spreading, acute, entire apically; stamens 3, included; filaments distinct, 1–2 mm, glabrous; anthers white, ovate, 0.4–0.5 mm. |
Achenes | brown, globose-lenticular, 2.5–3 mm. |
brown, globose-lenticular, 2–3 mm. |
2n | = 42. |
= (78), 80, (82). |
Chorizanthe clevelandii |
Chorizanthe uniaristata |
|
Phenology | Flowering May–Sep. | Flowering Apr–Jul. |
Habitat | Sandy to gravelly flats and slopes, mixed grassland and chaparral communities, pine-oak woodlands | Sandy to gravelly talus or clay flats and slopes, mixed grassland and chaparral communities, pine-oak woodlands |
Elevation | 400-2000 m (1300-6600 ft) | 800-1900 m (2600-6200 ft) |
Distribution |
CA
|
CA
|
Discussion | Chorizanthe clevelandii is locally infrequent to common in scattered locations in the Coast Ranges from Mendocino and Lake counties south to Santa Barbara County, and across the Transverse and Tehachapi ranges of Ventura and Kern counties to the southern Sierra Nevada in Tulare County. It is the most widely distributed of the spineflowers endemic to California. The involucres stick to fur, clothing, and fingers, aiding dispersal of the achenes. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Chorizanthe uniaristata is scattered in the Inner Coast Ranges and across the Transverse and Tehachapi ranges to the southern Sierra Nevada. One-awn spineflower is a polyploid, but whether an autopolyploid or an autoallopolyploid has not been determined. It has the smallest meiotic chromosomes observed by C. B. Hardham (1989). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 5, p. 460. | FNA vol. 5, p. 460. |
Parent taxa | Polygonaceae > subfam. Eriogonoideae > Chorizanthe > subg. Amphietes > sect. Ptelosepala | Polygonaceae > subfam. Eriogonoideae > Chorizanthe > subg. Amphietes > sect. Ptelosepala |
Sibling taxa | ||
Name authority | Parry: Proc. Davenport Acad. Nat. Sci. 4: 62. (1884) | Torrey & A. Gray: Proc. Amer. Acad. Arts 8: 195. (1870) |
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