Triphysaria
Annual hemi-parasitic herbs. Leaves alternate, lowest opposite, entire at base becoming pinnately divided upwards. Inflorescence a spike, bracteate; bracts pinnately lobed with 1–3 pairs of filiform divisions. Flowers zygomorphic, bisexual; sepals united to form 4-lobed tube; petals united to form a tube, 2-lipped, upper lip forming a beak, lower lip 3-saccate, shorter or longer than beak; stamens 4, in 2 pair, 1 pair longer than the other; anthers with 1 pollen sac; stigma capitate or bilobed. Fruit an ovoid or oblong loculicidal capsule. Seeds numerous, ovoid or narrowly ellipsoid with a reticulate tight-fitting seed coat.
6 species predominantly from California, with one species extending into western Canada and one from China; 1 species recorded in Australia.