Camissonia benitensis |
Camissonia campestris |
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San Benito evening-primrose, San Benito suncup |
field primrose, Mojave sun cup |
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Habit | Herbs villous and also glandular puberulent distally. | Herbs glabrous, villous, strigillose, or glandular puberulent, especially distally, sometimes glabrous distally. | ||||
Stems | erect or decumbent, slender, wiry, usually branched, 3–20 cm. |
erect or decumbent, slender, wiry, usually well-branched, 5–25(–50) cm. |
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Leaves | proximalmost not clustered near base, green or slightly bluish green; blade very narrowly elliptic, 0.7–2 × 0.1–0.3 cm, base cuneate or attenuate, margins sparsely serrulate, apex acute. |
proximalmost not clustered near base; blade linear to narrowly elliptic or narrowly oblanceolate, 0.5–2.5(–3) × 0.1–0.15(–0.5) cm, base attenuate, margins sparsely serrulate to coarsely serrate, apex acuminate. |
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Flowers | opening near sunrise; floral tube ca. 1.2 mm, moderately to very sparsely pubescent inside on proximal 1/2; sepals 3.2–3.5 mm, reflexed in pairs; petals 3.5–4 mm, each ± with 2 red dots basally; episepalous filaments 2 mm, epipetalous filaments 1.2 mm, anthers 0.3–0.6 mm, pollen with usually less than 10% of grains 4-pored; style 2.1–2.5 mm, stigma surrounded by anthers at anthesis. |
opening near sunrise; floral tube 1.5–5.5 mm, ± densely villous on proximal 1/2 inside; sepals 3.5–8(–12) mm, reflexed in pairs; petals (3.5–)5–15.5 mm, each usually with 1 or 2 red dots basally; episepalous filaments (1.4–)2.1–5.5 mm, epipetalous filaments (0.7–)1.2–3.2 mm, anthers 1–2.4 mm, pollen with less than 5% of grains 4- or 5-pored; style (3.2–)4–12(–15) mm, stigma well exserted beyond anthers at anthesis. |
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Capsules | 15–45 × 0.8–1.3 mm; subsessile. |
20–43 × 0.7–1.5(–2) mm; subsessile. |
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Seeds | 0.6–0.8 × 0.3–0.4 mm. |
0.8–1.6 × 0.4–0.6 mm. |
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2n | = 28. |
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Camissonia benitensis |
Camissonia campestris |
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Phenology | Flowering Apr–Jul. | |||||
Habitat | Sandy or gravelly serpentine soil on alluvial terraces and sandy or gravelly serpentine soil in upland areas in geologic interfaces between serpentine and non-serpentine rock types in Quercus. | |||||
Elevation | 600–1400 m. (2000–4600 ft.) | |||||
Distribution |
CA |
California
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Discussion | Camissonia benitensis is known from New Idria and nearby serpentine areas, lower Clear Creek drainage and San Carlos Creek, San Benito County, and is reported from adjacent Fresno and Monterey counties. More than 50,000 individuals are known, but their habitat is threatened by off-road vehicles. P. H. Raven (1969) determined that Camissonia benitensis is a self-compatible tetraploid and autogamous, also stating that C. benitensis is most likely closely related to C. strigulosa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 2 (2 in the flora). P. H. Raven (1969) determined that Camissonia campestris is 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 campestris, O. dentata var. campestris, Sphaerostigma campestre, S. dentatum subsp. campestre | |||||
Name authority | P. H. Raven: Contr. U.S. Natl. Herb. 37: 332, fig. 60. (1969) | (Greene) P. H. Raven: Brittonia 16: 284. (1964) | ||||
Web links |