Eremothera chamaenerioides

(A. Gray) W. L. Wagner & Hoch

Syst. Bot. Monogr. 83: 209. 2007.

Basionym: Oenothera chamaenerioidesa. Gray Smithsonian Contr. Knowl. 5(6): 58. 1853
Synonyms: Camissonia chamaenerioides (A. Gray) P. H. Raven O. erythra (Davidson) J. F. Macbride Sphaerostigma chamaenerioides (A. Gray) Small S. erythrum Davidson
Treatment appears in FNA Volume 10.

Herbs glandular puberulent and sparsely strigillose distally, especially in inflorescence. Stems usually well branched from base, 8–50 cm, flowering only distally. Leaves cauline, with lower ones clustered near base, (0.7–)2–8(–10) × 0.1–2.5 cm; petiole 0.1–3.5 cm; blade very narrowly elliptic to narrowly elliptic, margins entire or sparsely denticulate. Inflorescences nodding. Flowers opening at sunset; floral tube 1.5–3 mm, villous in proximal 1/2 inside; sepals 1.5–2.5 mm; petals white, fading pinkish, 1.8–3 mm; episepalous filaments 0.7–1.5 mm, epipetalous filaments slightly shorter, anthers 0.5–1.1 mm; style 2.3–4.5 mm, villous prox­imally, stigma 0.7–1 mm diam., surrounded by anthers at anthesis. Capsules narrowly cylindrical throughout, spreading, straight, terete, 35–60 × 0.7–1 mm, regu­larly but tardily dehiscent. Seeds monomorphic, gray, 0.9–1 × 0.3–0.4 mm, finely reticulate. 2n = 14.


Phenology: Flowering (Jan–)Feb–Jun.
Habitat: Sandy desert slopes and flats.
Elevation: -50–1700 m.

Distribution

Ariz., Calif., Nev., N.Mex., Tex., Utah, Mexico (Baja California, Sonora).

Discussion

Eremothera chamaenerioides occurs in sub-Mogollon Arizona, southeastern California, southern Nevada, southern New Mexico, trans-Pecos Texas, and Kane, Millard, Tooele, and Washington counties, Utah. P. H. Raven (1969) determined Eremothera chamaenerioides to be self-compatible and autogamous.

Selected References

None.

Lower Taxa

None.
Warren L. Wagner +
(A. Gray) W. L. Wagner & Hoch +
Oenothera chamaenerioidesa. +
Ariz. +, Calif. +, Nev. +, N.Mex. +, Tex. +, Utah +, Mexico (Baja California +  and Sonora). +
-50–1700 m. +
Sandy desert slopes and flats. +
Flowering (Jan–)Feb–Jun. +
Syst. Bot. Monogr. +
Camissonia chamaenerioides +, O. erythra +, Sphaerostigma chamaenerioides +  and S. erythrum +
Eremothera chamaenerioides +
Eremothera +
species +