Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Thread-leaf Sundrops
Oenothera linifolia
Family: Onagraceae

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

Global Rank: G5
State Rank: S1S2

Rock ledges and sandy barrens (Gleason & Cronquist 1991); prairies, and dry slopes; in KY, on thin limestone soil in open fields and barrens.

Species Description:
Annual herb.

Flowering Period: Early April to late June.

Additional Information at NatureServe

Diagnostic Characteristics:
The most distinctive character of this small (1-5 dm) annual plant are the numerous and crowded stem leaves that are less than 1 mm wide. Basal leaves are wider, generally ovate in shape. The yellow flowers are in a long terminal raceme and petals are 3-5 mm long. Capsules are 4-angled.

Timber removal may be beneficial and even needed to maintain the open character of the habitat for this species. Hand removal of trees in the vicinity of the population is necessary to avoid impacts from timber operations. Exotic pest plants are a threat to this species and should be removed. Avoid creating access to the site through trail or road construction.

Global Range:

Known Kentucky Occurrences:

Note: To print pages from this site change Page Setup to Landscape
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
Copyright © 2003-2013 Commonwealth of Kentucky. All rights reserved.