Two New Species of Combretaceae from Puntarenas, Costa Rica

Two new species of Combretaceae are described from Costa Rica. Combretum graciliflorum is related to C. cacoucia Exell and is only the second species of section Cacoucia (Aublet) Engler & Diels known in America. Buchenavia costaricensis is the second species of the genus from Central America and is evidently not closely related to the other (B. tetraphylla (Aublet) R. A. Howard). Combretum assimile Eichler is also reported as new to Costa Rica, from the same area as the above two new species (Osa Peninsula, Puntarenas).