Cor rotate, deeply lobed; corona rotate, its margin prolonged into 5 short, broadly rounded, deeply bifid lobes opposite the cor-lobes and 5 long, ascending, linear lobes alternating with them; filaments distinct; pollen-tetrads in each pollen-sac loosely coherent to form 2 distally open, cornucopia-shaped pollinia, each of which is entered by an expanded, sticky branch of the 2-cleft translator-arm; twining or erect shrubs with fls in terminal or apparently axillary, paniculiform cymes. 10, Old World.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.