ibclogo XVI International Botanical Congess

Abstract Number: 3509
Poster No. = 173


A NEW SPECIES OF LACTARIUS ASSOCIATED WITH DICYMBE IN THE FORESTS OF GUYANA.


Andrew S. Methven, Department of Biological Sciences, Eastern Illinois University, Charleston, IL, 61920-3099, Terry W. Henkel and Rytas Vilgalys, Botany Department, Duke University, Durham, NC 27708-0338.


The Russulales form an interesting component of the agaric mycota in the tropical forests of South America. Field work in an angiosperm forest in Guyana uncovered an undescribed species of Lactarius in section Russulares. This taxon represents the first report of Lactarius as a putative ectotrophic associate with two leguminous species in the Caesalpiniaceae, Dicymbe altsonii Sandw. and D. corymbosa Spruce ex. Benth. The taxon will be fully described, illustrated and discussed. The significance of this discovery and its relationship with ongoing studies of ectotrophic agarics in the tropical forests of Guyana will also be presented.

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