Flora of North America species comparison

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Chylismia arenaria

Fortuna Range suncup, sand evening-primrose
Habit Herbs perennial, sometimes facultative annual, villous, sometimes also sparsely glandular puberulent in inflorescences.
Stems

well branched, 25–180 cm.
Leaves

cauline, often mostly toward base;

petiole 3–6 cm;

blade cordate-deltate, 2.5–4(–6) × 2.5–4(–6) cm, smaller distally, margins coarsely dentate.
Racemes

nodding, open.
Flowers

floral tube 18–40 mm, finely pubescent inside;

sepals 8–15 mm;

petals bright to pale yellow, 8–20 mm;

filaments 5–9 mm, anthers 5–8 mm;

style 30–58 mm, stigma exserted beyond anthers at anthesis.
Capsules

ascending, cylindrical, 30–44 mm;

pedicel 2–5 mm.
Seeds

0.5–0.7 mm.
2n

= 14.

Chylismia arenaria
Phenology Flowering Mar–Apr.
Habitat Sandy washes, rocky slopes, desert scrub in Sonoran Desert shrublands, usually with Ambrosia dumosa, Carnegiea, Larrea tridentata, and Prosopis.
Elevation -50–500 m. (-200–1600 ft.)
Distribution
from FNA
AZ; CA; Mexico (Sonora)
[WildflowerSearch map]
[BONAP county map]
Discussion

Chylismia arenaria is known from the foot of the Needles in Mohave County, Arizona, and from the north end of the Salton Sea, Riverside County, California, southeastward to the Tinajas Atlas Range, Arizona, and Sonora, Mexico. P. H. Raven (1962, 1969) determined C. arenaria to be self-compatible, but primarily outcrossing.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Lignothera
Sibling taxa
C. atwoodii, C. brevipes, C. cardiophylla, C. claviformis, C. confertiflora, C. eastwoodiae, C. exilis, C. heterochroma, C. megalantha, C. multijuga, C. munzii, C. parryi, C. scapoidea, C. specicola, C. walkeri
Synonyms Camissonia arenaria, Oenothera arenaria, O. cardiophylla var. longituba, O. cardiophylla var. splendens
Name authority A. Nelson: Amer. J. Bot. 21: 575. (1934) — (as Chylisma)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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