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Keys
Vascular plant groups
Club mosses
Ferns
Vegetative key to families
Gymnosperms
Flowering plants
Genera
Families
Pteridium Gled. ex Scop >
Veins free below the
sori
.
Indusium
2-valved; the outer false
indusium
coriaceous
; the inner true
indusium
thin.
Rhizome
clothed with
simple
hairs.
Stipule
-like pinnules absent at the base of the primary pinnae.
Pteridium