Aerial stem-parasitic shrubs, often robust, usually with epicortical runners bearing secondary haustoria. Leaves commonly alternate or scattered, less commonly opposite. Inflorescences a simple raceme or spike, sometimes very few-flowered and seemingly umbellate; bract single under each flower, simple. Corolla 5-or rarely 4-merous, gamopetalous, usually weakly zygomorphic but sometimes regular. Anthers basifixed, immobile. Style simple, usually with a knob-like stigma. Fruit ovoid. Fig. 2. Fig. 20. Fig. 21. Fig. 22. Fig. 23.
Aerial stem-parasitic shrubs, spreading to pendulous; epicortical runners usually present. Leaves opposite, displaced-opposite or alternate, penninerved. Inflorescence axillary, a raceme or (not in Australia) spike, sometimes reduced to 1 or 2 flowers; bract 1 under each flower. Petals 5, united to middle or higher into a curved tube inflated in middle and unequally lobed. Stamens equal; anthers dorsifixed, immobile, introrse, 4-locular.