Pellaea ternifolia
Pteridaceae
brake family
stout and erect/ascending or more slender and creeping, often branched;
scales and/or hairs present.
monomorphic or dimorphic, circinate or non-circinate.
with a wide range of variation in dividedness and indumentum.
borne abaxially on simple, forked or anastomosing veins, not aggregated into distinct sori, often appearing to cover the leaf undersurface or form (sub)marginal lines;
indusia absent; false indusia formed from recurved leaf margins present or not.
trilete; tetrahedral often with a hemispherical distal section; wall ornamentation various.
mostly reniform or heart-shaped; flat, green.
Pellaea ternifolia
Pteridaceae
Cosmopolitan. At least 50 genera and 1000 species; 6 genera treated in Flora.
Pteridaceae is a large family in the Polypodiales, currently with five fairly well-defined subfamilies (Christenhusz et al. 2011). Oregon’s three subfamilies with genera are: Cryptogrammoideae (Cryptogramma), Cheilanthoideae (Aspidotis, Cheilanthes, Pellaea, Pentagramma), Vittarioideae (Adiantum, formerly placed in Adianteae).
USDA Plants Database- Local floras:
CA, 
OR - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
PNW Herbaria 
WildflowerSearch
iNaturalist (observations)- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
