Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Kentucky Gladecress
Leavenworthia exigua var. laciniata
Family: Brassicaceae

Protection Status:
State Status:  E
USFWS Status: PT

Global Rank: G4T1T2
State Rank: S1S2

In full sun on flat-bedded outcrops of Silurian limestone or dolomite in shallow soils of glades, rock outcrops, pastures and lawns.

Species Description:
Long-persistent annual herb.

Flowering Period: Early March to late April.

Additional Information at NatureServe

Diagnostic Characteristics:
This species of glade cress differs in having white to lavender flowers with petals that are shallowly emarginate (having a notch) and less than 10 mm in length. The sepals are 3.5-5 mm (generally smaller than L. stylosa). The fruit are flattened. The terminal leaf lobe is notably larger than the lateral lobes.

Exotic pest plants are a threat to this species and should be removed. Avoid creating access to the site through trail or road construction. Direct ATV or other vehicle impacts should be avoided. Timber removal may be beneficial and even needed to maintain the open character of the woods surrounding the open rocky habitat for this species. Hand removal of trees in the vicinity of the glade habitat is necessary to avoid impacts from timber operations.

Global Range:
Kentucky: Bullitt and Jefferson counties

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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