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 filiform; the style and stigma together c. as long as the ovary. Flowers in globular heads, 5–10 mm diam. Stamens exserted. Staminal scales oblanceolate, included in the corolla tube. Widespread, usually on leguminous plants. Introd. from Europe. Fl. spring–summer Cuscuta epithymum