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 two species in California, belonging to the sub-family Rosoideae. Within this group it is distinguished by the tri-pinnatifid leaves and the five-petalled flowers with a single pistil borne in a funnel-to cup-shaped receptacle; fruit an achene.

Species articles