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Published In: Species Plantarum 2: 1015. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

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 genus with 2-3 species, distributed in tropics, subtropics and warm temperate regions in the Old as well as in the New World. Represented in Pakistan by the following species.

 

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Submerged, dioecious, stoloniferous, glabrous, short-stemmed, perennial herbs with fibrous roots. Leaves radical, sessile, linear, ribbon-shaped, parallel-sided, entire or faintly dentate, obtuse. Flowers unisexual, female solitary, males numerous. Male spathe ovoid, 3-fid at the tip, shortly pedunculate. Male flowers pedicellate, minute, breaking off and floating on the water surface; sepals 3, ovate or oblong-ovate, petaloid; petals 3, minute or absent; stamens 1-3, anthers didymous; pistillode absent. Female spathe tubular, bifid on long slender peduncle that spirally coils after fertilization. Female flower: sepals and petals as in the male; ovary inferior, sessile, linear, unilocular with 3 parietal placentae; styles 3, each 2-lobed with hairs on the innerside; staminodes 3, each bifid. Furit linear, cylindric, 5-10 cm long, included within the spathe. Seeds oblong to fusiform, with membranous testa.
 
 
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