Halophila beccarii Aschers. 1871  

Perennial herbs, monoecious. Root 1 per node, 1.6-2.7 mm in length; root hair pubescent. Rhizomes delicate; internodes 1.8-2.2 cm in length; scales membranous, upper one 3.6-5.1 by 1.5-2 mm, lower one 2.4-3.1 by ca. 1.8 mm. Stems branching, sometimes becoming a rhizome; internodes 2.0-7.1 mm in length. Leave imbricated and presenting as a pseudo-whorl containing 4-10 ones, with an oblong sheath at the base of petiolate. Leaf blades glabrous, green, elliptic, sightly lanceolate, 7.5-11 mm in length, 1.1-2.1 mm in width; leaf apex broadly acute; leaf margin entire, sometimes undulate; leaf base attenuate to cuneate, sometimes shortly attenuate or rounded; triplinerve with the intramarginal ones joining the midrib near the apex, crossing veinlets absent. Flowers axillary. Spathes membranous, transparent, obovate; the apex entire. Staminate flowers stalked, each with an ovate scale at the base; tepals oblong to ovate, convex, the midrib obvious; stamens 3; anthers basifixed, ca. 1.21 mm in length. Pistallate flowers yellowish; tepal(or a reduced perianth?) ovate, sightly undulate at the apex; ovary obicular to ovate, ca. 1.02 mm in length; styles short, ca. 2.4 mm; stigmata 2, ca. 10.1 mm in length; ovules 3-5, ca. 0.3 mm in length. Fruits and seeds not seen.