Vegetative key to the families >

ROOTLESS EPIPHYTIC PARASITES.
Stems thread-like, leafless or almost so, forming tangled masses over the host and attached to the host by haustoria
Stems yellowish or reddish. Usually parasitic on herbs Convolvulaceae
Leafless parasitic twiners Cuscuta
Stigmas capitate
Staminal scales 2-fid. Corolla lobes ovate, obtuse. Styles shorter than the ovary. Capsule 3–4 mm diam. Chiefly coastal swampy areas. Parasitic on a variety of species but particularly Polygonum and Persicaria. Fl. summer. Australian Dodder Cuscuta australis