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Keys
Vascular plant groups
Club mosses
Ferns
Vegetative key to families
Gymnosperms
Flowering plants
Genera
Families
Pteridaceae
Fronds1 to irregularly 4-pinnate,
herbaceous
.
Sori
in broad
linear
bands along margin of
frond
.
Rhachis
deeply grooved.
Pteridaceae
choose this alternative
reject this alternative
Fronds 1-pinnate or imperfectly
bipinnate
with some of the lower primary pinnae divided into a few, ribbon-like,
sessile
segments. Veins free, transverse to the
midrib
, usually
simple
or once forked
choose this alternative
reject this alternative
Fronds 2–4-pinnate; the pinnules never ribbon-like. Veins
reticulate
or free and once forked