2 NEW SPECIES OF QUIINACEAE (QUIINA, FROESIA) FROM THE VENEZUELAN GUAYANA AND SOME REMARKS ON THE GENUS FROESIA PIRES

Two new species of Quiinaceae from the Venezuelan Guayana are describe d: Quiina yatuensis and Froesia gereauana. Quiina yatuensis is known f rom the Amazonian lowlands. The new Froesia species was found at high elevations in the Guayana Highlands, a center of local endemism. A key and distribution map for the species of Froesia Fires are given. The small neotropical family Quiinaceae is composed of medium-sized trees and shrubs, mainly located in the Amazon lowlands. At present 4 genera are recognized-Froesia Fires, Lacunaria Ducke, Quiina Aublet, and Tou roulia Aublet-with about 55 species. Specimens were investigated in th e context of the treatment of the family for the Flora of the Venezuel an Guayana (Schneider & Zizka, in prep.) and for the Flora Neotropica.