Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Plains Frostweed
Helianthemum bicknellii
Family: Cistaceae

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

Global Rank: G5
State Rank: S1S2

Prairies, rocky open areas. Dry, sandy soil. Also woodlands and glades (Weakley 1998).

Species Description:
Perennial herb.

Flowering Period: Early June to late July.
Fruiting Period: Early August to late October.

Additional Information at NatureServe

Diagnostic Characteristics:
Small (2-5 dm) plant on dry soils with clustered stems and alternate leaves that are stellate pubescent, especially on the underside. Some of the flowers yellow and conspicuous (over 1 cm) for such a small plant. The capsule is 3-6 mm. Members of this family have 5 sepals, 2 outer ones smaller than the inner 3 (although they are nearly equal in this species).

Woody plant invasion may need to be controlled using periodic prescribed fire, mowing or other means to maintain the open character of the habitat for this species. Hand removal of trees in the vicinity of the species is necessary. Soil disturbance such as ATV trails, timber removal or any activity that results in increased erosion and weed invasion will be detrimental. Exotic pest plants are a threat to this species and should be removed.

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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