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Keys
Vascular plant groups
Club mosses
Ferns
Vegetative key to families
Gymnosperms
Flowering plants
Genera
Families
Hydrocharitaceae
Partially or wholly submerged herbs, sometimes marine
Hydrocharitaceae
consider the other alternative
Ovary
inferior; male flowers with more than 1
stamen
consider the other alternative
Fresh water plants
choose this alternative
reject this alternative
Leaves all basal arising from a
rootstock
growing on the bottom of a stream or pond
choose this alternative
reject this alternative
Leaves
cauline
,
opposite
or whorled, on elongated occasionally branched submerged stems with
adventitious
roots. Flowers unisexual,
axillary