Flora of North America species comparison

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Oenothera californica subsp. eurekensis
Photo is of parent taxon

Eureka dunes evening primrose
Habit 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.

Oenothera californica subsp. eurekensis
Phenology Flowering (Mar)Jun–Jul(Sep).
Habitat Sand dunes.
Elevation 900–1200 m. (3000–3900 ft.)
Distribution
from FNA
CA
[BONAP county map]
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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Anogra > Oenothera californica
Sibling taxa
O. californica subsp. avita, O. californica subsp. californica
Synonyms O. deltoides subsp. eurekensis, O. avita subsp. eurekensis
Name authority (Munz & J. C. Roos) W. M. Klein: Aliso 5: 179. (1962)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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