Oenothera avita subsp. eurekensis

(Munz & J. C. Roos) W. M. Klein in N. L. Britton et al.

N. Amer. Fl., ser. 2 5: 116. 1965.

Common names: Eureka Dunes evening primrose
Basionym: Oenothera deltoides subsp. eurekensis Munz & J. C. Roos Aliso 3: 118, fig. 7. 1955
Synonyms: O. californica subsp. eurekensis (Munz & J. C. Roos) W. M. Klein
Treatment appears in FNA Volume 10.

Herbs perennial, densely strig­illose and villous; with deep-seated, fleshy underground parts from underground horizontal rootstocks. Stems sprawling to decumbent, sometimes new rosettes forming at stem apex when becoming buried in drifting sand, 15–60 cm. Leaves: blade rhombic-ovate to oblanceolate, margins entire or weakly dentate. Flowers: floral tube 25–30 mm; sepals 15–25 mm; petals 20–30 mm. Capsules 30–70 mm. 2n = 14.


Phenology: Flowering (Mar)Jun–Jul(Sep).
Habitat: Sand dunes.
Elevation: 900–1200 m.

Discussion

Subspecies eurekensis is known from three main areas within the Eureka Dunes system, Inyo County. It is federally listed as endangered and is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.
Warren L. Wagner +
(Munz & J. C. Roos) W. M. Klein +
Oenothera deltoides subsp. eurekensis +
Eureka Dunes evening primrose +
900–1200 m. +
Sand dunes. +
Flowering (Mar)Jun–Jul(Sep). +
N. Amer. Fl., ser. 2 +
O. californica subsp. eurekensis +
Oenothera avita subsp. eurekensis +
Oenothera avita +
subspecies +