Chylismia heterochroma |
Chylismia cardiophylla |
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Shockley's evening-primrose |
heart leaf primrose, heartleaf suncup |
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Habit | Herbs annual, glandular puberulent throughout, or glabrate and glaucous distally. | Herbs annual or perennial, villous and glandular puberulent. | ||||
Stems | several, 10–100 cm. |
usually well branched, forming bushy habit, 20–100 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. |
cauline, mostly toward base; petiole (0.7–)2.5–7.5 cm; blade cordate-ovate to -orbiculate, 2.5–7.5 × 2.3–5.5 cm, smaller distally, margins erose-dentate. |
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Racemes | erect, elongating in anthesis. |
nodding, congested. |
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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. |
floral tube 4.5–14 mm, villous inside; sepals 3–9 mm; petals yellow, 3–12 mm; filaments 1–3 mm, anthers 2–4 mm; style 8–23 mm, stigma surrounded by or exserted just beyond anthers at anthesis. |
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Capsules | erect, clavate, 7–13 mm; pedicel 2–5 mm. |
ascending, cylindrical, 20–55 mm; pedicel 1–18 mm. |
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Seeds | 1–1.2 mm. |
0.5–0.7 mm. |
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2n | = 14. |
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Chylismia heterochroma |
Chylismia cardiophylla |
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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; nw Mexico
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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 (2 in the flora). P. H. Raven (1962, 1969) determined this species to be self-compatible, but primarily outcrossing. Subspecies cedrosensis (Greene) W. L. Wagner & Hoch, occurs in Baja California and adjacent Sonora, Mexico. (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. Lignothera | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Oenothera heterochromas., Camissonia heterochroma, C. heterochroma var. monoensis, O. heterochroma subsp. monoensis, O. heterochroma var. monoensis | Oenothera cardiophylla, Camissonia cardiophylla | ||||
Name authority | (S. Watson) Small: Bull. Torrey Bot. Club 23: 193. (1896) — (as Chylisma) | (Torrey) Small: Bull. Torrey Bot. Club 23: 193. (1896) — (as Chylisma) | ||||
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