Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Small Sundrops
Oenothera perennis
Family: Onagraceae

Protection Status:
State Status:  E
USFWS Status: {null}

Global Rank: G5
State Rank: S1S2

Dry to moist open ground, open woods, fields, and meadows.

Species Description:
Perennial herb.

Flowering Period: Early June to late August.

Additional Information at NatureServe

Diagnostic Characteristics:
This small Oenothera is distinct in having small flowers (petals 3-10mm and anthers 0.5-2.5mm) and the stigmas at about the same height as the anthers. One flower per plant opens at one time in the evening. The fruit is glandular pubescent and angled. Leaves are entire and generally elliptic.

In general, woody plant succession may need to be controlled using prescribed fire or other means to maintain the open character of the habitat for this species. Disturbance like roads and tree removal could degrade the habitat by causing erosion or weed/pest invasion.

Global Range:

Known Kentucky Occurrences:

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Data last updated: Wednesday, May 28, 2014
Kentucky State Nature Preserves Commission
801 Teton Trail
Frankfort,KY 40601
Phone: (502) 573-2886
Fax: (502) 573-2355
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