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Published In: Mémoires de la Classe des Sciences Mathématiques et Physiques de L'Institut National de France 12(2): 9, 61, 76. 1812[1814]. (Mém. Cl. Sci. Math. Inst. Natl. France) Name publication detail

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Contributor Text: ABDUL GHAFOOR
General/Distribution: A monotypic genus, distributed in Eurasia and Africa to Australia; introduced in the New World.


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Submerged, monoecious or dioecious, perennials with slender, branched stems. Leaves in whorls of 3-8 (-12), cauline, sessile, linear to lanceclate with conspicuous midrib, subentire or serrate. Flowers unisexual, minute, actinomorphic, solitary, without nectaries. Male spathe ± sessile, solitary axillary, flattened, globose, ± muricate, Male flower: shortly pedicellate; sepals 3, ovate-oblong to obovate, scarious, green, imbricate; petals 3, linear, white; stamens 3, alternating with the petals; pistillode present. Female spathe sessile, cylindrical, apically bifid, membranous, rostrate. Female flowers: sepals as in the male, petals somewhat narrower than sepals; ovary 3-carpellate, shorter than the spathe, cylindrical to narrowly conical with filiform beak; styles 3, entire. Fruit cylindrical to narrowly conical, glabrous or softly muricate. Seeds 2-6, oblong-ellipsoidal.
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