Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Yellow Screwstem
Bartonia virginica
Family: Gentianaceae

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

Global Rank: G5
State Rank: S2

Bogs, swamps, savannas (Weakley 2011); dry or wet acid soil; in KY, mossy seeps.

Species Description:
Mycotrophic annual.

Flowering Period: Early August to late September.

Additional Information at NatureServe

Diagnostic Characteristics:
This small (1-4 dm) plant of wet prairies and sphagnum bogs has opposite (as opposed to alternate in B. paniculata) leaves that are reduced to scales along the stem. Petals are oblong, denticulate and abruptly narrowed to rounded with a minute tip (mucro).

Timber removal may be beneficial. Hand removal of trees in the vicinity is needed to maintain the open character of the habitat for this species. Soil disturbing could cause increased erosion and be detrimental. Changes in moisture/hydrologic conditions of the habitat for this species would likely be detrimental. Changes could result from overstory removal, stream/wetland alteration or impacts due to erosion or soil deposition. Exotic pest plants are a threat to this species.

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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