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Published In: Synopsis Plantarum 1: 400. 1805. (Syn. 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 of c. 21 species, distributed in tropical and subtropical regions of both the New and Old World. Doubtfully represented in Pakistan by the following species.

 

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Glabrous, submerged, monoecious or dioecious perennial herbs with short stems, without stolons. Leaves radical, with sheathing petiole, linear, lanceolate, broadly ovate to suborbicular, cordate or reniform, basally cuneate, truncate or cordate, obtuse, actue apiculate at the apex. Flowers unisexual or bisexual, female and hermaphrodite ones solitary, sessile, staminate many, actionomorphic. Spathes tubular, bifid, elliptic or ovate, ± prominently 5-6-ribbed or 2-10-winged, wings wavy-margined, rarely spinose, pedunculate, peduncle angled. Sepals 3, linear, oblong or ovate, green, membranous margined, persistent. Petals 3, oblong, broad ovate to orbicular, much longer and wider than the sepals, basally ± fleshy, white or variously coloured. Stamens 6-15 (-20), in 3-5 whorls, filaments filiform, flattened, anthers erect, linear or oblong. Ovary included within spathe, sessile, oblong, narrowing upwards, incompletely 6- loculed by intruding parietal placenta; styles 3-15, free, each bifid; 3 stylodia present in male flowers. Fruit fleshy, oblong, attenuate at the tip, many-seeded, 6-valved, included. Seeds minute, oblong or fusiform.
 
 
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