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pale yellow sun cup

Lewis' evening-primrose

Habit Herbs annual, appearing conspicuously grayish, densely strigillose, sometimes also glandular puberulent distally. Herbs annual, villous, also glandular puberulent distally.
Stems

usually with decumbent lateral branches from basal rosette, 5–60 cm.

usually several, decumbent, rarely 1 erect stem, 30–60 cm.

Leaves

1–5(–11) × 0.2–0.7(–1.4) cm;

petiole 0–0.2(–0.4) cm, distal ones sessile;

blade lanceolate to narrowly ovate, base often cuneate to truncate, sometimes attenuate, margins sparsely denticulate, apex acute to obtuse.

1–8 × 0.2–1.1 cm;

petiole 0–3 cm;

blade narrowly lanceolate-elliptic, base cuneate or subcordate, margins denticulate, apex acute.

Flowers

opening near sunrise;

floral tube 1–4.2 mm;

sepals (1.5–)2.5–8 mm;

petals yellow, sometimes with 1–3 red dots basally, (2–)3.5–13 mm; episepalous filaments (0.5–)1.5–6.5 mm, epipetalous filaments (0.2–)0.5–3.8 mm, anthers (0.4–)0.8–2.2 mm, less than 5% of pollen grains 4- or 5-pored;

style (2.1–)3–10.5 mm, stigma surrounded by at least anthers of longer stamens, often by both sets, at anthesis.

opening near sunrise;

floral tube 1.5–4 m;

sepals 1.7–3.4 mm;

petals yellow, with 1 or 2 red dots basally, 2.5–5.5 mm; episepalous filaments 2–2.8 mm, epipetalous filaments 1–1.7 mm, anthers 0.7–1.2 mm, less than 5% of pollen grains 4- or 5-pored;

style 2.8–4.5 mm, stigma surrounded by anthers at anthesis.

Capsules

usually 1–3-coiled spiral, subterete in living material, 4-angled when dry, 13–24 × 0.7–1.2 mm.

usually loosely 1-coiled, conspicuously 4-angled in living material, 13–20 × 1.8–2.2 mm.

Seeds

1–1.5 mm.

0.7–0.8 mm.

2n

= 14.

Camissoniopsis pallida

Camissoniopsis lewisii

Phenology Flowering Mar–May(–Sep).
Habitat Open sandy and clayey grasslands, coastal dunes and beaches.
Elevation 0–300 m. (0–1000 ft.)
Distribution
w United States; nw Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; Mexico (Baja California)
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[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

P. H. Raven (1969) determined Camissoniopsis pallida to be self-compatible and primarily autogamous.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Camissoniopsis lewisii occurs from Point Dume and the Los Angeles Basin, Los Angeles County, south to Cardon Grande at the northern edge of Baja California Sur. P. H. Raven (1969) determined C. lewisii to be self-compatible and primarily autogamous, and suggested that this coastal Camissoniopsis may have been derived more or less directly from coastal populations of C. bistorta.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Floral tube 1–3 mm; petals (2–)3.5–6(–8) mm; styles (2.1–)3–6.5 mm.
subsp. pallida
1. Floral tube 3.8–4.2 mm; petals 6.5–13 mm; styles 6.5–10.5 mm.
subsp. hallii
Source FNA vol. 10. FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Camissoniopsis Onagraceae > subfam. Onagroideae > tribe Onagreae > Camissoniopsis
Sibling taxa
C. bistorta, C. cheiranthifolia, C. confusa, C. guadalupensis, C. hardhamiae, C. hirtella, C. ignota, C. intermedia, C. lewisii, C. luciae, C. micrantha, C. robusta
C. bistorta, C. cheiranthifolia, C. confusa, C. guadalupensis, C. hardhamiae, C. hirtella, C. ignota, C. intermedia, C. luciae, C. micrantha, C. pallida, C. robusta
Subordinate taxa
C. pallida subsp. hallii, C. pallida subsp. pallida
Synonyms Sphaerostigma pallidum, Camissonia pallida, Oenothera abramsii, O. micrantha var. abramsii Camissonia lewisii
Name authority (Abrams) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 205. (2007) (P. H. Raven) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 205. (2007)
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