|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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Perennial from slender, creeping rhizome, glabrous, aquatic, submersed, monoecious or dioeciousRetrieve key for ZANNICHELLIACEAE
Stem thread-like, weak
Leaves alternate below to ± whorled and linear above; sheath fused to blade or free, stipule-like
Staminate inflorescence generally below pistillate inflorescence, axillary; flowers 13
Pistillate inflorescence terminal, short-stalked; flowers 19, sessile, subtended by cup-like bract
Staminate flower: perianth parts 0 or 3 and scale-like; stamens 13, filaments free or fused; anther 12-chambered
Pistillate flower: perianth parts 0; ovary superior, chamber 1, ovule 1, style 1, simple or 3-lobed
Fruit: achene or nutlet
Genera in family: 4 genera; 910 species: ± worldwide
Recent taxonomic note: Recently treated in Potamogetonaceae [Angiosperm Phylogeny Group 1998 Ann Missouri Bot Gard 85:531553].