Aerial stem-parasitic shrubs, erect to pendulous; epicortical runners present or absent. Leaves usually opposite, rarely displaced-opposite or verticillate, entire, usually curvinerved in Australian spp. Inflorescence axillary, basically a pedunculate umbel of triads but variously reduced in some species, especially to a simple umbel or a head; rays of umbel 2 to several, usually strongly divergent; bract usually 1 under each flower. Petals usually 4-6, free in Australian spp. Anthers basifixed, immobile, 2-or 4-locular.