Citation: Lout., Fl. Cochinch. 2:653 (1790).

Derivation: Latin name of some water plant, from Neptunus, Neptune.

Synonymy: Not Applicable

Common name: None

Description:
Perennial herbs, prostrate to ascending, sometimes aquatic; leaves bipinnate; stipules membranous, persistent or deciduous, glands and stipels present or absent.

Inflorescence of globose or cylindrical spikes, 1 or 2 on axillary peduncles; flowers 5-merous, green rarely yellow, upper flowers perfect, lower flowers sterile; calyx campanulate 5-lobed; petals valvate, coherent or free; stamens free, 5 or rarely 10.

Legumes flat, dehiscent, with 1-8 rarely to 20 transverse seeds.

Distribution:  About 11 species mainly in tropical and warm temperate regions, 5 species native to Australia. (Windler (1966) Aust. J. Bot. 14:379-420.)

Biology: No text

Author: Not yet available