Chylismia heterochroma |
Chylismia brevipes |
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Shockley's evening-primrose |
golden suncup, Mojave suncup, yellow cups |
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Habit | Herbs annual, glandular puberulent throughout, or glabrate and glaucous distally. | Herbs annual, moderately to densely villous, sometimes strigillose. | ||||||||
Stems | several, 10–100 cm. |
branched, 3–75 cm. |
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Leaves | primarily in poorly defined basal rosette, cauline greatly reduced when present; petiole 0.4–8 cm; blade unlobed, ovate to cordate, 2–11.5 × 1.4–5 cm, margins sinuate-dentate, brown oil cells prominently lining veins abaxially. |
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 | erect, elongating in anthesis. |
nodding, mostly elongating after flowers. |
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Flowers | opening at sunrise; buds without free tips; floral tube 2–5 mm, villous inside; sepals 1.5–3.5 mm; petals lavender, paler and often with flecks toward base, often yellow at very base, fading darker lavender, 2–6 mm; stamens unequal, filaments of antisepalous ones 1.8–3 mm, of antipetalous ones 1–2.5 mm, anthers 0.6–1 mm, glabrous or sparsely ciliate; style 4–7 mm, stigma surrounded by anthers at anthesis. |
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 | erect, clavate, 7–13 mm; pedicel 2–5 mm. |
ascending or spreading, oblong-cylindrical, 18–92 mm; pedicel 2–20 mm. |
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Seeds | 1–1.2 mm. |
1–1.5 mm. |
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2n | = 14. |
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Chylismia heterochroma |
Chylismia brevipes |
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Phenology | Flowering May–Jun. | |||||||||
Habitat | Alluvial and rocky slopes. | |||||||||
Elevation | 600–2200 m. (2000–7200 ft.) | |||||||||
Distribution |
CA; NV
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sw United States
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Discussion | Chylismia heterochroma is known from Churchill and Lander counties, Nevada, south to Lincoln and southern Nye counties, Nevada, to adjacent California (Mono Lake, Mono County, and central Inyo counties). P. H. Raven (1962, 1969) determined this species to be self-compatible and autogamous. (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 | Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Chylismia | Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Chylismia | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Oenothera heterochromas., Camissonia heterochroma, C. heterochroma var. monoensis, O. heterochroma subsp. monoensis, O. heterochroma var. monoensis | Oenothera brevipes, Camissonia brevipes | ||||||||
Name authority | (S. Watson) Small: Bull. Torrey Bot. Club 23: 193. (1896) — (as Chylisma) | (A. Gray) Small: Bull. Torrey Bot. Club 23: 194. (1896) — (as Chylisma) | ||||||||
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