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Genus :


Family :



Perennial, submerged herbs. Shoots erect, subtended by 2 elliptic or ovate scales. Rhizome creeping, herbaceous, monopodial. Leaves 1-4, alternate, flattened, linear, entire, 3-veined, margin toothed at apex, leaf-sheath 1-6 cm l ong, compressed,  bi-auriculate, ligulate. Flowers axillary to leafy bracts. Male flowers : consisting of 2 unequally inserted anthers attached to the axis, filament absent, pollen filiform. Female flowers subsessile, style simple, undivided. Fruitlet achene-like, laterally subcompressed,  globose to ovoid, beaked, with bony pericarp.

Key to the species

Serial Key Reference
1a. Rhizomatous scales ovate; leaf apex truncate or obtuse, lateral teeth inconspicuous; styles c 1.3 mm long, lateral H. pinifolia
1b. Rhizomatous scales elliptic; leaf apex trifid, lateral teeth conspicuous; styles 3-4 mm long, apical H. uninervis