Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Southern Maidenhair-fern
Adiantum capillus-veneris
Family: Pteridaceae

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

Global Rank: G5
State Rank: S2S3

Moist to wet limestone seeps. reported on shale, often in association with waterfalls or near travertine deposits..

Species Description:
Perennial herb.

Flowering Period: Early June to late July.

Additional Information at NatureServe

Diagnostic Characteristics:
Terminal segments of blades fan-like; blades with a naked rachis (more than 1-2 pinnatid) and divided into distinct pinnae. Rachis dark brown and wiry over 2/3 their lengths. Sori marginal and occurring at the tips of each lobes. Leaves ovate-lanceolate and the petiole not forked at summit (characters adapted from Jones 2001).

Disturbance of cliffline or surrounding slopes around the habitat for this species may cause erosion, soil deposition downslope or invite weed/ pest invasion. Changes in moisture conditions at the site would likely degrade the habitat for this species.

Global Range:
This species is globally widespread in tropical and warm-temperate regions, including Eurasia, Africa, the West Indies, Central America and South America (in Venezuela and Peru). The North American range includes roughly the southern one-third of the U.S., with additional disjunct populations in South Dakota and British Columbia (Flora of North America Editorial Committee 1993). In North America, it is sometimes escaped from cultivation north of its natural range (Lellinger 1985, Gleason and Cronquist 1963). Populations in California may be introduced (Hickman 1993). Known in Colorado (Moffat, Mesa, Montrose, Ouray, Montezuma and Las Animas counties).

Known Kentucky Occurrences:

Note: To print pages from this site change Page Setup to Landscape
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
Copyright © 2003-2013 Commonwealth of Kentucky. All rights reserved.