| 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 |
Perennial, often large, terrestrial or semi-aquatic, rhizomed, monoecious or dioecious
Stem ± 0
Leaves simple, generally alternate, from rhizome, often large; stipules 0 or scale-like; blades < to > petioles, ± round to reniform or ovate, generally toothed or lobed
Inflorescence: spike or panicle of spikes, terminal or from upper axils, large; flowers many, often pistillate below, staminate above, bisexual between
Flower very small; sepals generally 2 or ± 0; petals 2 or 0; stamens 1–2; ovary inferior, chamber 1, styles 2
Fruit: drupe
Genera in family: 1 genus, ± 35 species: Mex, s hemisphere; several cultivated. Sometimes included in Haloragaceae.
Etymology: (J.E. Gunner, Norwegian bishop, botanist, 1718–1773)
Reference: [Osborne et al. 1991 Bioscience 41:224–234]
Blue-green algae sometimes in live rhizome, or roots, fix nitrogen for host plant.