Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Barbara's Buttons
Marshallia grandiflora
Family: Asteraceae

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

Global Rank: G2
State Rank: S1

Primarily found along the flood-scoured banks of large, high-gradient rivers in Kentucky but also reported from creek banks, bluffs and floodplains elsewhere in its range.

Species Description:
Perennial herb.

Flowering Period: Early June to late July.

Additional Information at NatureServe

Diagnostic Characteristics:
The leaves may be all basal or a few in alternate arrangement on the stem; lower ones are long-petioled with 3-nerves on the blade. The flower heads are solitary on a single peduncle 1-3 dm in length. Flowers are white to light blue and have an elongate hairy tube that is lobed at the end. In Kentucky, this species is found on gravel/boulder bars.

Avoid changes in moisture/hydrologic conditions at the site. Changes could result from overstory removal, stream/wetland alteration or vegetation removal that would result in increased erosion. 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. Avoid creating access to the site through trail or road construction.

Global Range:
Historical range: "Occurring along rocky river and lake shores, creek banks, bluffs and flood plains in moist to wet sandy soil and in medi-acid soil of Coastal Plain-like "bogs", uplands from southwestern Pennsylvania southward through West Virgina into southeastern Kentucky, east-central Tennessee and southwestern North Carolina, (Map 1), (Channell, 1957). Present Range: Pennsylvania (Fayette, Somerset, Allegheny County), West Virginia (Barbour, Nicholas, Preston, Randolph, Upshur, Greenbrier, Fayette, Webster, Summers, Marion, Monogahela counties), Kentucky (McCreary), Tennessee (Morgan, Roane, Scott counties). Maryland (Garrett County), North Carolina (Henderson, Polk County).

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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