Oenothera hartwegii subsp. fendleri

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

Syst. Bot. Monogr. 83: 212. 2007.

Basionym: Oenothera fendleri A. Gray Mem. Amer. Acad. Arts, n. s. 4: 45. 1849
Synonyms: Calylophus hartwegii subsp. fendleri (A. Gray) Towner & P. H. Raven Galpinsia fendleri (A. Gray) A. Heller G. hartwegii var. fendleri (A. Gray) Small O. hartwegii var. fendleri (A. Gray) A. Gray
Treatment appears in FNA Volume 10.

Herbs usually glabrous throughout, sometimes glan­dular puberulent on distal parts, especially on ovaries. Leaves 1–5 × 0.15–1 cm, fascicles of small leaves to 1 cm (when present); blade linear to oblanceolate or lance­olate, base attenuate to obtuse, rarely nearly clasping, margins entire or subentire, rarely undulate. Flowers: buds with free tips 0.5–3 mm; floral tube 30–50 mm; sepals 9–28 mm; petals 10–30 mm; filaments 5–12 mm, anthers 5–13 mm; style 40–75 mm. 2n = 14.


Phenology: Flowering Apr–Oct.
Habitat: In scattered populations on clay or gravelly soil, sometimes calcareous, in grasslands, often with Juniperus and Prosopis, to woodlands with Juniperus, Pinus edulis, sometimes Pinus ponderosa.
Elevation: 300–2200 m.

Distribution

Ariz., Kans., N.Mex., Okla., Tex., Mexico (Chihuahua).

Discussion

Subspecies fendleri is known from Barber, Comanche, and Morton counties, Kansas, south through western Oklahoma and scattered sites in the Texas Panhandle to eastern Chihuahua, central trans-Pecos Texas, central and western New Mexico, and east-central Arizona. It is the most distinctive subspecies in the complex.

Selected References

None.

Lower Taxa

None.
Warren L. Wagner +
(A. Gray) W. L. Wagner & Hoch +
Oenothera fendleri +
Ariz. +, Kans. +, N.Mex. +, Okla. +, Tex. +  and Mexico (Chihuahua). +
300–2200 m. +
In scattered populations on clay or gravelly soil, sometimes calcareous, in grasslands, often with Juniperus and Prosopis, to woodlands with Juniperus, Pinus edulis, sometimes Pinus ponderosa. +
Flowering Apr–Oct. +
Syst. Bot. Monogr. +
Calylophus hartwegii subsp. fendleri +, Galpinsia fendleri +, G. hartwegii var. fendleri +  and O. hartwegii var. fendleri +
Oenothera hartwegii subsp. fendleri +
Oenothera hartwegii +
subspecies +