Description

Key Characters:

Growth Form: Submerged marine herb.

Stems: Rhizomes slender, prostrate, and branched, 0.57–0.7 mm in diameter with internodes 2.8–29.8 mm long

Roots: One root per node.

Leaves: Leaves simple. Leaves opposite and subtended by two scales at each node. Scales transparent, 3.1–4.5 mm long, obovate, keeled and sparsely covered with short hairs. Blades grass green, elliptic to oblong; 12.9–18.5 mm long, 3.8–6.3 mm wide. Apex obtuse. Base cuneate to obtuse. Surfaces densely covered in minute unicellular hairs. Margins serrulate. Each blade with five to eight pairs of ascending non-forked cross-veins arranged alternately to sub-oppositely which join the intra-marginal veins. Petioles short, 4.3–16 mm long, 0.3–0.51 mm in diameter.

Flowers: Plants monoecious. One male (staminate) and one female (pistillate) flower occur at the same node enclosed by a semi-transparent spathe Male flowers with three oblong-elliptic tepals. Female flowers lacking a perianth. Female flowers bear three long styles atop the hypanthium connected to the ovary.

Fruit: Fruit ovoid to spherical.

Ploidy:

Habitat:

Elevation Range: