Chylismia specicola |
Chylismia heterochroma |
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Shockley's evening-primrose |
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Habit | Herbs perennial, base sometimes woody, glabrous or sparsely villous proximally. | Herbs annual, glandular puberulent throughout, or glabrate and glaucous distally. | ||||
Stems | with several divergent branches from base, 10–50 cm. |
several, 10–100 cm. |
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Leaves | primarily in basal rosette and cauline, 3–20 × 0.7–2.5 cm; petiole 0.5–4 cm; blade pinnately or bipinnately lobed, terminal lobe ovate to elliptic, 0.4–2.5 × 0.3–1.5 cm, margins irregularly serrate, dark brown oil cells prominently lining veins abaxially. |
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. |
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Racemes | erect, elongating after anthesis. |
erect, elongating in anthesis. |
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Flowers | opening at sunrise; buds individually reflexed, with apical free tips less than 1 mm; floral tube 1.5–2 mm, glabrous inside; sepals 2–5 mm; petals bright yellow, with red dots near base, fading pale lavender, 2–6 mm; stamens unequal, filaments of antisepalous stamens 1.5–3 mm, those of antipetalous ones 1–2 mm, anthers 1.2–2 mm, glabrous; style 4–7 mm, stigma surrounded by anthers at anthesis. |
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. |
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Capsules | spreading to ascending, oblong-cylindrical, 8–20 mm; pedicel 6–10 mm. |
erect, clavate, 7–13 mm; pedicel 2–5 mm. |
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Seeds | 0.6–1 mm. |
1–1.2 mm. |
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2n | = 14. |
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Chylismia specicola |
Chylismia heterochroma |
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Phenology | Flowering May–Jun. | |||||
Habitat | Alluvial and rocky slopes. | |||||
Elevation | 600–2200 m. (2000–7200 ft.) | |||||
Distribution | Arizona |
CA; NV
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Discussion | Subspecies 2 (2 in the flora). P. H. Raven (1962, 1969) thought that this species is most likely self-compatible but primarily outcrossing. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
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Key |
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Source | FNA vol. 10. | FNA vol. 10. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Oenothera specicola, Camissonia specicola | Oenothera heterochromas., Camissonia heterochroma, C. heterochroma var. monoensis, O. heterochroma subsp. monoensis, O. heterochroma var. monoensis | ||||
Name authority | (P. H. Raven) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 208. (2007) | (S. Watson) Small: Bull. Torrey Bot. Club 23: 193. (1896) — (as Chylisma) | ||||
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