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Keys
Vascular plant groups
Club mosses
Ferns
Vegetative key to families
Gymnosperms
Flowering plants
Genera
Families
Marsileaceae >
Plants
aquatic
,
rhizome
submerged in the mud but some of the laminas may be floating. Sporocarps hard and woody, borne at the base of or along the stipes, 3–9 mm long
Marsileaceae
consider the other alternative
Sterile
lamina
linear
,
filiform
or grass-like
Pilularia