|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
For up-to-date information about California vascular plants, visit the Jepson eFlora.
Perennial from long, slender, jointed rhizomes, dioecious, marine aquatic, glabrous
Stem erect, sometimes short
Leaves simple, cauline, alternate or opposite, 2-ranked; sheath open; ligule present; blade 0.515 mm wide, ± linear, ± flat or cylindric, margin entire
Inflorescence: flowers 12 (or bracted cyme), axillary
Flowers minute; perianth 0
Staminate flower: stamens 2, filaments 0 or short and ± fused; pollen filament-like, sticking together in string-like bodies < 1 mm wide
Pistillate flower: pistils 12, simple, ovary superior, chamber 1, ovule 1, style 1, lobes 03
Genera in family: 5 genera, ± 13 species: tropical, subtropical worldwide.
Stems erect, several, short
Leaves alternate to ± opposite, narrowly linear; tip generally 3-toothed
Flowers 1 per node, ± enclosed by leaf sheaths
Staminate flower: anther sacs attached to filament at different places
Pistillate flower short-stalked; pistils 2, simple, attached to receptacle at slightly different places, ovary asymmetric, style 1, simple, thread-like, from side of ovary
Species in genus: 12 species: tropical, subtropical marine
Etymology: (Greek: perhaps from ancient name meaning under salty water)
Poorly known except to students of algae. Sometimes treated in Zannichelliaceae.
|YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).|