Oenothera deltoides subsp. deltoides

Synonyms: Oenothera deltoides var. cineracea (Jepson) Munz O. kleinii W. L. Wagner & S. W. Mill O. trichocalyx var. cineracea Jepson
Treatment appears in FNA Volume 10.

Herbs annual, strigillose, sometimes also villous; from a taproot. Stems: central stem erect, usually thickened, with several leafy, ascending, slender branches from near base, encircling stems in older plants, 20–60 (–100) cm. Leaves basal and cauline; blade rhombic-lanceolate, becoming oblanceolate to lanceolate distally, margins usually coarsely sinuate-dentate to subentire, rarely pinnatifid. Flowers: buds weakly quadrangular, with free tips 0–1.5 mm; sepals 20–35 mm; petals 18–44 mm. Capsules 40–80 × 2–3.5 mm. 2n = 14.


Phenology: Flowering (Mar–)Jun–Jul(–Sep).
Habitat: Sandy places, dunes, Mojave and Sonoran deserts.
Elevation: -50–1300 m.

Distribution

Ariz., Calif., Nev., Mexico (Baja California), Mexico (Sonora)

Discussion

W. M. Klein (1964) determined most populations of subsp. deltoides that were studied to be self-incompatible, but found a few in Riverside County, California, to be self-compatible. Oenothera kleinii was described from a single, small roadside population near Wolf Creek Pass in Colorado. Subsequent study and discussion with W. A. Weber suggested that this pop­ulation was not native to the location, but grew there accidently; it has not been collected again in Colorado. Further study of morphological diversity of O. deltoides has shown that the distinguishing characters mentioned when O. kleinii was described, such as longer hairs and larger capsules and seeds, do in fact occur in plants within the natural range of O. deltoides.

Selected References

None.

Lower Taxa

None.
0.5 cm5 mm <br />0.005 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
1.5mm +  and 5mm +
Warren L. Wagner +
Torrey & Frémont in J. C. Frémont +
5 cm50 mm <br />0.05 m <br /> (25 cm250 mm <br />0.25 m <br />) +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
pale green +  and yellow usually fading orange purple pale-yellow reddish or whitish +
pedicel-like +
Anogra +
indehiscent +  and loculicidal +
sinuate-dentate +  and pinnatifid denticulate subentire or entire +
oblanceolate +  and lanceolate +
40 cm400 mm <br />0.4 m <br /> (100 cm1,000 mm <br />1 m <br />) +
decumbent +  and ascending +
few +  and several +
slender +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
quadrangular +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
straight +  and curved +
4 cm40 mm <br />0.04 m <br /> (8 cm80 mm <br />0.08 m <br />) +
tapering +, cylindrical +  and slightly 4-angled +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
12 cm120 mm <br />0.12 m <br /> (18 cm180 mm <br />0.18 m <br />) +
4 cm40 mm <br />0.04 m <br /> (12 cm120 mm <br />0.12 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
unbranched +  and branched +
60 cm600 mm <br />0.6 m <br /> (100 cm1,000 mm <br />1 m <br />) +
20 cm200 mm <br />0.2 m <br /> (60 cm600 mm <br />0.6 m <br />) +
Ariz. +, Calif. +, Nev. +, Mexico (Baja California) +  and Mexico (Sonora) +
-50–1300 m. +
pink +  and white +
exfoliating +
basifixed +  and versatile +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
hispid +, lanate +  and glabrous +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
zygomorphic +  and actinomorphic +
unscented +
1 +  and several +
curved +  and straight +
indehiscent +  and dehiscent +
4-angled +, terete +, tapering +, cylindrical +, ellipsoid +, clavate +, ovoid ellipsoid +  and cylindrical rhombic-obovoid or globose +
Sandy places, dunes, Mojave and Sonoran deserts. +
suffrutescent +
villous +  and strigillose +
nodding +  and erect +
13 cm130 mm <br />0.13 m <br /> (26 cm260 mm <br />0.26 m <br />) +
deciduous +
cauline +  and basal +
1 cm10 mm <br />0.01 m <br /> (13 cm130 mm <br />0.13 m <br />) +
pinnatifid +, usually coarsely sinuate-dentate +  and subentire +
pedicellate +  and sessile +
1 +  and 8 +
fading pink +  and deep pink +
obcordate +
1.8 cm18 mm <br />0.018 m <br /> (4.4 cm44 mm <br />0.044 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Flowering (Mar–)Jun–Jul(–Sep). +
Rep. Exped. Rocky Mts., +
basal +  and cauline +
clavate +  and globose +
sculptured +  and smooth +
obovoid +
reduced +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not spotted +
deciduous +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
parietal +, axile +  and placentation +
unequal +
adventitious +
aquatic +, amphibious +  and terrestrial +
in 2 unequal series +  and subequal +
2 times as many or as many as sepals +
with short , lateral branches +  and unbranched +
decumbent +  and ascending or erect +
petiolate +  and sessile +
intrapetiolar +
pubescent +  and glabrous +
3.5 cm35 mm <br />0.035 m <br /> (6 cm60 mm <br />0.06 m <br />) +
aquatic +, amphibious +  and terrestrial +
smooth +, reticulate +  and furrowed +
alveolate +
Oenothera deltoides var. cineracea +, O. kleinii +  and O. trichocalyx var. cineracea +
Oenothera deltoides subsp. deltoides +
Oenothera deltoides +
subspecies +
3(-5)-aperturate +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
woody +  and hard +
smooth +  and erose +
papillate +