Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Genus Description - Hypanthium prolonged beyond the inferior ovary, saucer-shaped to tubular; sep longer than the small pet; sep, pet, and stamens (4)5, the stamens opposite the sep and (except in R. lacustre) usually inserted at the level of the sinuses; ovary unilocular with 2 parietal placentas; style usually bifid; fr a many seeded berry; shrubs with palmately veined and lobed lvs (many of them fascicled on short lateral branches) and small fls in small clusters or racemes. (Grossularia, Limnobotrya) 150, N. Temp. and Andes.