Flora of North America species comparison

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Oenothera heterophylla subsp. orientalis
Photo is of parent taxon

oriental evening primrose
Habit Herbs densely to sparsely strigillose, also at least parts of inflorescence glandular puberulent or glabrate.
Flowers

buds with free tips usually erect, 1–3 mm;

floral tube 30–47 mm;

sepals 17–30 mm;

petals 25–35 mm.
2n

= 14.

Oenothera heterophylla subsp. orientalis
Phenology Flowering May–Jul.
Habitat Sandy soil of open sites, old alluvium areas in woodlands.
Elevation 30–60 m. (100–200 ft.)
Distribution
from FNA
AL; AR
[BONAP county map]
Discussion

Subspecies orientalis is known from two disjunct areas: Greene, Pickens, and Sumter counties, Alabama, and Calhoun, Nevada, and Ouachita counties, Arkansas. W. Dietrich and W. L. Wagner (1988) determined populations in Arkansas to be self-incompatible while those sampled in Alabama were self-compatible.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Oenothera > subsect. Candela > Oenothera heterophylla
Sibling taxa
O. heterophylla subsp. heterophylla
Name authority W. Dietrich, P. H. Raven & W. L. Wagner: Ann. Missouri Bot. Gard. 70: 196. (1983)
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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