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.




Bentham and Hooker united this genus to Halesia, apparendy on insufficient grounds, for most botanists now concur in keeping the two separate. They are really very distinct. Pterostyrax is exclusively Chinese and Japanese (Halesia is eastern N. American); the inflorescence is paniculate and many-flowered; the parts of the flowers are in fives (fours in Halesia); the stamens are protruded in Pterostyrax (enclosed in Halesia); the pith is continuous (chambered in Halesia).

Species articles