What is "broussaisia"

Kanawao (Broussaisia arguta) is a species of perennial flowering plant in the Hydrangea family, Hydrangeaceae, that is endemic to Hawaii. It belongs to a monotypic genus.

Kanawao is a widespread species occurring in mesic and wet forests on all of the main Hawaiian Islands. It is a dioecious, evergreen plant that either grows as a shrub or a tree. The obovate leaves are long and wide with finely serrated margins.