Adiantum aleuticum var. aleuticum
(synonym of Adiantum pedatum)
Adiantum
northern maidenhair fern, western maidenhair fern
maidenhair fern
creeping to ascending, with dense narrow reddish or yellowish scales, bicolored or monochromatic.
monomorphic, deciduous, usually thin and herbaceous.
long; brittle, usually dark-colored, often equal to or longer than blades, glabrescent to sparsely hairy/scaly.
narrow to wide, 1–4 pinnate, ultimate segments often broad and leaf-like; fan-shaped to strongly asymmetric; false indusia present, formed from the recurved margin, variously linear to crescent-shaped.
borne on and below the false indusium.
tetrahedral-globose, with a rounded distal section; rough-textured.
Adiantum aleuticum var. aleuticum
Adiantum
[After the publication of volume 1, Flora of Oregon, we accepted this variety. The treatment of this taxon in volume 1 corresponds to Adiantum aleuticum.]
Cosmopolitan. 126 species; 2 species treated in Flora.
Adiantum capillus-veneris is a widespread native species of the southern U.S. that can also escape from cultivation. It is reported from California, including Siskiyou County, and is likely to occur in Oregon. It resembles A. jordanii and can be distinguished by the shape of the leaf segments. In A. capillus-veneris, some segments are lobed more than 25% of the way to the cuneate base, while A. jordanii is more shallowly lobed, and the base is obtuse or truncate.
Duncan Thomas
- Local floras:
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
PNW Herbaria 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
