A NEW GENUS AND SPECIES OF DIPTEROCARPACEAE FROM THE NEOTROPICS .1. INTRODUCTION, TAXONOMY, ECOLOGY, AND DISTRIBUTION

Londono, A. C., E. Alvarez (Fundacion Tropenbos-Colombia, Apartado Aer eo 36062, Bogota, Colombia), E. Forero, and C. M. Morton (The New York Botanical Garden, Bronx, NY 10458-5126, U.S.A.). A new genus and spec ies of Dipterocarpaceae from the Neotropics. I. Introduction, taxonomy , ecology, and distribution. Brittonia 47: 225-236. 1995.-A new genus and species of Dipterocarpaceae, Pseudomonotes tropenbosii, from Amazo nian Colombia is described and illustrated. This new taxon, which appe ars most closely related to the subfamily Monotoideae, is the second r eported occurrence of a member of the family in the Neotropics. The ne w entity differs from the rest of the Dipterocarpaceae in the absence of fasciculate trichomes and in having sepals conspicuously aliform (r eaching 10-16 cm in length) and one ovule per locule with nearly basal (sub-basal) placentation.