Bidens subalternans DC.
Candolle, A.P. de (1836) Prodromus Systematis Naturalis Regni Vegetabilis 5: 600. Type: "in locis cultis circa Bahiam legit cl. Salzmann. .. (v.s. comm. a cl. Salzmann.)".
Greater Beggar's Ticks
Annual herb, but occasionally reaches a shrub of 1-1.5 m tall.
Each fruit or nutlet ending in 2-3(4) plumes each with downward pointing hairs which adhere to clothes, animal fur, etc. Fruits about 9-26 mm long. Seeds (achenes) about 8-17 mm long. Embryo about 6-8 mm long, cotyledons about 2/3 of the length of the embryo. Cotyledons wider than the radicle.
Three varieties occur in Australia, see Flora of Australia 37: pages 465-467.