KNP Rare Plants Database

KY Office of Kentucky Nature Preserves

Necklace Gladecress
Leavenworthia torulosa
Family: Brassicaceae

Protection Status:
State Status:  T
USFWS Status: 

Global Rank: G4
State Rank: S2


Photo by Thomas G. Barnes
Limestone glades and other thin-soil areas where limestone bedrock is at or near surface, holding water in spring.

Species Description:
Annual herb producing many seeds. probably long persistent.

Flowering Period: Early March to late April.

Additional Information at NatureServe

Diagnostic Characteristics:
This species of gladecress differs in having fruit that are constricted between each seed giving it the appearance of a chain of beads. The seeds do not have wings. The terminal lobe of the leaf is notably larger than the lateral lobes and the petals have a greenish to lavender tint and a small notch at the end. These are very small plants (about 5 cm or less) with the flower on a scape and are found associated with open rocky glade habitat.

Timber removal may be beneficial and even needed to maintain the open character of the habitat for this species. Hand removal of trees in the vicinity of the population is necessary to avoid impacts from timber operations. 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:

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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