KNP Rare Plants Database

KY Office of Kentucky Nature Preserves

Lucy Braun's White Snakeroot
Ageratina luciae-brauniae
Family: Asteraceae

Protection Status:
State Status:  S
USFWS Status: 

Global Rank: G3
State Rank: S3


Photo by Cary Tichenor
Moist areas near the dripline of sandstone rockhouses.

Species Description:
Perennial herb.

Flowering Period: Early September to late September.

Additional Information at NatureServe

Diagnostic Characteristics:
This perennial herb is similar looking to the common white snakeroot (A.altissium synonym = Eupatorium rugosum). The difference is this rockhouse species has leaf blades about as long as the petiole (the "stem" of the leaf) and they are very thin and delicate. The leaf petioles are longer than the leaf blade in white snakeroot.

The habitat for this species is very specialized and not likely to withstand much alteration. Grazing or browsing pressure, vegetation removal, hydrologic changes (i.e. vegetation removal in the vicinity, stream alterations) would be detrimental.

Global Range:
Cumberland Plateau in Tennessee and Kentucky. Fentress, Pickett, Scott, and Morgan Cos., Tennessee; Jackson, McCreary, Pulaski, Whitley and Wolfe Cos., Kentucky.

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
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