KNP Rare Plants Database


 
KY Office of Kentucky Nature Preserves




Plains Frostweed
Helianthemum bicknellii
Family: Cistaceae

Protection Status:
State Status:  E
USFWS Status: 

Global Rank: G5
State Rank: S1S2

   

Photo by University of Tennessee Herbarium (TENN)
Habitat:
Prairies, rocky open areas. Dry, sandy soil. Also woodlands and glades (Weakley 1998).

Species Description:
Perennial herb.

Phenology:
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 of clustered stems on dry soils with alternate leaves. 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). The leaves of this species are stellate pubescent, especially on the underside.

Management:
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:
Species occurrence map

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Data Last Updated: November 2018
Office of Kentucky Nature Preserves
300 Sower Blvd
Frankfort,KY 40601
Phone: (502) 573-2886
Email:
naturepreserves@ky.gov
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