A modern reference to temperate woody plants, including updated content from this site and much new material, can be found at Trees and Shrubs Online.




A genus of a few species of deciduous trees, natives of eastern Asia and the Fiji Islands. They have alternate, pinnate or bipinnate leaves, and flowers in large terminal panicles; calyx unequally five-lobed; petals four; fruits bladder-like. Named after J. G. Koelreuter, a professor of botany at Karlsruhe, 1733-1806.

From the Supplement (Vol. V)

The genus is revised by F. G. Meyer in the Journal of the Arnold Arboretum, Vol. 57, pp. 129-66 (1976).

Species articles