Chylismia brevipes subsp. arizonica |
Chylismia brevipes |
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Arizona sun cup |
golden suncup, Mojave suncup, yellow cups |
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Habit | Herbs slender, often branched distally, villous, sometimes also strigillose, at least distally. | Herbs annual, moderately to densely villous, sometimes strigillose. | ||||||||
Stems | branched, 3–75 cm. |
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Leaves | primarily in basal rosette, cauline greatly reduced when present, 6–14 × 1.5–3.5 cm; petiole 1.5–4(–11) cm; blade pinnately lobed or lateral lobes greatly reduced or absent, often mixed on same plant, terminal lobe usually ovate, rarely elliptic, 2.5–6.9 × 1.5–7 cm, margins irregularly dentate, oil cells on abaxial surface inconspicuous. |
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Racemes | nodding, mostly elongating after flowers. |
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Flowers | buds individually reflexed, without free tips or with apical free tips less than 1 mm; floral tube orange-brown inside, 3–5 mm; petals often with red dots at base, often fading reddish, 3–8 mm; anthers 2.5–5 mm. |
opening at sunrise; buds sometimes individually reflexed, without free tips or with subapical free tips 1–2 mm, or with minute, apical free tips less than 1 mm; floral tube 3–8 mm, densely short-villous inside proximally; sepals 5–9 mm; petals bright yellow, sometimes with red dots at base, fading yellow to orange or reddish, 3–18 mm; stamens subequal, filaments 3–6 mm, anthers 2.5–6 mm, ciliate; style 10–18 mm, stigma exserted beyond anthers at anthesis. |
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Capsules | 18–60 mm; pedicel 2.5–5 mm. |
ascending or spreading, oblong-cylindrical, 18–92 mm; pedicel 2–20 mm. |
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Seeds | 1–1.5 mm. |
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2n | = 14. |
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Chylismia brevipes subsp. arizonica |
Chylismia brevipes |
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Phenology | Flowering Feb–Apr. | |||||||||
Habitat | Rocky slopes, flats. | |||||||||
Elevation | 70–300 m. (200–1000 ft.) | |||||||||
Distribution |
AZ; CA |
sw United States
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Discussion | Subspecies arizonica is known from Yuma County, Arizona, and eastern Imperial County, California. It hybridizes with Chylismia claviformis subspp. peeblesii, rubescens, and yumae. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 3 (3 in the flora). P. H. Raven (1962, 1969) determined this species to be self-incompatible. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 10. | FNA vol. 10. | ||||||||
Parent taxa | ||||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Oenothera brevipes subsp. arizonica, Camissonia brevipes subsp. arizonica | Oenothera brevipes, Camissonia brevipes | ||||||||
Name authority | (P. H. Raven) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 205. (2007) | (A. Gray) Small: Bull. Torrey Bot. Club 23: 194. (1896) — (as Chylisma) | ||||||||
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