Desmodium trichostachyum Benth.
Bentham, G. (1864) Flora Australiensis 2: 234. Type: N. Australia. Islands of the Gulf of Carpentaria, R. Brown; Arnhems Land, F. Mueller; Port Essington, Armstrong. Queensland. Endeavour river, Banks and Solander; E. coast, A. Cunningham.
Leaves 1-3-foliolate; stipules ovate to deltoid, 2.5-4 x 1-1.5 mm long, with parallel veins; petiole 3-12 mm long, with a patch of dense hairs at the top part; rachis 1-4 mm long; leaflets orbicular to broadly oblong, truncate or retuse at the apex, glabrous, sometimes with hairs on abaxial surface; 1-foliolate leaflet 8-20 x 9-20 mm; when 3-foliolate terminal leaflet 5-15 x 6-16 mm, lateral leaflets smaller; stipels 0.2-1 mm long
Inflorescence terminal and very open, up to 25 cm long, flowers single subtending by an ovate acuminate bract 1-2 mm long, secondary barcats and bracteoles absent; pedicels slender, 2-6 mm long, doubling in length in fruit. Flowers with calyx 1.4-2.1 mm, pubescent with long white hairs at upper half of lobes; tube 0.5-0.7 mm long, upper lobe 0.8-1.4 mm long, incised to about the middle, other lobes shorter or about equal in length, 0.6-1.3 mm long; corolla purplish; standard obovate, obtuse or retuse at apex, 2.5-3.3 x 2-2.5 mm, wings broad oblong with shrt claw, 1.8-2.5 x 0.7-1.2 mm, keel petals ca. longer and narrower than wings, 2.2-2.9 x 0.7-1 mm, tapered to base.
Features not available.