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.
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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), Mexico (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.
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
Warren L. Wagner +
(A. Gray) W. L. Wagner & Hoch +
8 cm80 mm <br />0.08 m <br /> (10 cm100 mm <br />0.1 m <br />) +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
papillose +
0.1cm;2.5cm +
Oenothera chamaenerioidesa. +
indehiscent +  and loculicidal +
elliptic +  and elliptic to narrowly +
entire +, sinuate-toothed +, serrulate +  and denticulate +
3.5 cm35 mm <br />0.035 m <br /> (6 cm60 mm <br />0.06 m <br />) +
terete +  and cylindrical +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Ariz. +, Calif. +, Nev. +, N.Mex. +, Tex. +, Utah +, Mexico (Baja California) +  and Mexico (Sonora) +
-50–1700 m. +
reddish green +  and white +
exfoliating +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
basifixed +  and versatile +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
actinomorphic +
straight +
loculicidal +
4-angled +, terete +  and cylindrical +
Sandy desert slopes and flats. +
strigillose +  and puberulent +
deciduous +
denticulate +  and entire +
numerous +  and 1 +
fading pinkish +  and white +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Flowering (Jan–)Feb–Jun. +
Syst. Bot. Monogr. +
basal +  and cauline +
clavate +  and globose +
monomorphic +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
7 +  and numerous +
sculptured +  and smooth +
truncate-ellipsoid +, narrowly obovoid +  and oblanceoloid +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
in pairs +  and singly +
purple +, pink +, red +  and green +
deciduous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
parenchymatous +
parietal +, axile +  and placentation +
unequal +
aquatic +, amphibious +  and terrestrial +
episepalous +
2 times as many or as many as sepals +
prostrate +  and decumbent +
ascending +  and erect +
8 cm80 mm <br />0.08 m <br /> (50 cm500 mm <br />0.5 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
subglobose +
subsessile +  and petiolate +
intrapetiolar +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
aquatic +, amphibious +  and terrestrial +
non-papillate +
Camissonia chamaenerioides +, O. erythra +, Sphaerostigma chamaenerioides +  and S. erythrum +
Eremothera chamaenerioides +
Eremothera +
species +
3(-5)-aperturate +
smooth +  and erose +
papillate +