A NEW GENUS AND SPECIES OF DIPTEROCARPACEAE FROM THE NEOTROPICS .2. STEM ANATOMY

Morton, C. M. (The New York Botanical Garden, Bronx, NY, 10458). A new genus and species of Dipterocarpaceae from the Neotropics. II. Stem a natomy. Brittonia 47: 237-247. 1995. -An examination of the external m orphology of a recent collection from Araracuara, Colombia, has sugges ted that the plant belongs to the primarily Old World family Dipteroca rpaceae. A study of the wood, bark, and pith anatomy of this new taxon , Pseudomonotes tropenbosii Londono, Alvarez & Forero, was undertaken to help confirm its systematic affinities. Comparisons of Pseudomonote s with data from the literature and reference wood slides, coupled wit h the use of computer-aided identification keys, support the view that its closest relationships probably are within the family Dipterocarpa ceae. Detailed anatomical comparisons have revealed that Pseudomonotes ' relationships are most likely to be with the subfamily Monotoideae, comprised of the African genera Monotes A. DC. and Marquesia Gilg.