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pale yellow sun cup

Photo is of parent taxon

Hall's sun cup

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

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

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.

floral tube 3.8–4.2 mm;

sepals 4.8–8 mm;

petals with 1–3 red dots basally, 6.5–13 mm; episepalous filaments 3–6.5 mm, epipetalous filaments 1.8–3.8 mm, anthers 1.5–2.2 mm;

style 6.5–10.5 mm.

Capsules

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

Seeds

1–1.5 mm.

2n

= 14.

Camissoniopsis pallida

Camissoniopsis pallida subsp. hallii

Phenology Flowering Mar–May(–Jun).
Habitat Sandy washes.
Elevation 30–1400 m. (100–4600 ft.)
Distribution
w United States; nw Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[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.)

Subspecies hallii occurs in Riverside and San Bernardino counties, from Banning east throughout the Little San Bernardino Mountains and their northern slopes and southeast to the vicinity of Mecca and Box Canyon.

(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 > Camissoniopsis pallida
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. pallida subsp. pallida
Subordinate taxa
C. pallida subsp. hallii, C. pallida subsp. pallida
Synonyms Sphaerostigma pallidum, Camissonia pallida, Oenothera abramsii, O. micrantha var. abramsii Sphaerostigma hallii, Camissonia pallida subsp. hallii, Oenothera bistorta var. hallii, O. hallii
Name authority (Abrams) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 205. (2007) (Davidson) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 204. (2007)
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