Oenothera demareei

(P. H. Raven & D. P. Gregory) W. L. Wagner & Hoch

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

Basionym: Gaura demareei P. H. Raven & D. P. Gregory Mem. Torrey Bot. Club 23(1): 78, figs. 21, 54. 1973
Treatment appears in FNA Volume 10.

Herbs usually robust winter-annual, sometimes biennial, densely strigillose throughout; from fleshy taproot. Stems usually well-branched distal to base, 50–400 cm. Leaves in a basal rosette and cauline, 3–7 × 0.2–0.8 cm; blade narrowly elliptic to elliptic or lanceolate, margins subentire or shallowly undulate-denticulate. Flowers 4-merous, zygomorphic, opening at sunrise; floral tube 4–13(–15) mm; sepals 13–20 mm; petals white, fading pink, rhombic-obovate, 10–17 mm; filaments 8–17 mm, anthers 3–7 mm, pollen 90–100% fertile; style 18–32 mm, stigma exserted beyond anthers at anthesis. Capsules ellipsoid or ovoid, sharply 4-angled, 4.5–7 × 1.5–2.5 mm; sessile. Seeds 2–4, yellowish to reddish brown, 1.2–3 × 0.7–1.3 mm. 2n = 14.


Phenology: Flowering Jul–Oct.
Habitat: Open meadows in sandy loam.
Elevation: 70–200 m.

Discussion

Oenothera demareei is known only from Clark, Garland, Hempstead, Howard, Montgomery, Pike, Saline, and Sevier counties.

P. H. Raven and D. P. Gregory (1972[1973]) found Oenothera demareei to be self-incompatible.

Selected References

None.

Lower Taxa

None.
... more about "Oenothera demareei"
Warren L. Wagner +
(P. H. Raven & D. P. Gregory) W. L. Wagner & Hoch +
Gaura demareei +
70–200 m. +
Open meadows in sandy loam. +
Flowering Jul–Oct. +
Syst. Bot. Monogr. +
Gaura sect. +  and Pleurostemon rafinesque +
Oenothera demareei +
Oenothera subsect. Gaura +
species +