| TREATMENT FROM THE JEPSON MANUAL (1993) |
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©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY |
Plant generally aquatic, generally rooted in, often stranded on mud; rhizome creeping, slender, branched
Leaves floating, emergent, or out of water, ± alike; blade 1-palmate or 0, << petiole; veins not or repeatedly forked, free or netted
Sporangia in stalked, spheric or ± flat-ovoid, hard cases of 1 kind, near petiole base
Spores large (female) and small (male), in separate sporangia
Genera in family: 3 genera, ± 70 species: especially temp.
Leaf grass-like; blade 0
Sporangium case fused only to stalk tip, spheric, hairy; teeth 0
Species in genus: ± 6 species: generally temp
Etymology: (Latin: little ball, from sporangium case)