Abstract
The Ganoderma lucidum complex in tropical America has been studied based on an examination of available types for all laccate Ganoderma species described from tropical America and 13 species are currently accepted. A preliminary key to and descriptions of these species are provided in an attempt to help to sort out the confused taxonomic situation which has prevailed in the genus. Ganoderma concinnum Ryvarden, G. longistipitatum Ryvarden and G. multicornum Ryvarden are described as new. The new combination Ganoderma orbiformum (Fr.) Ryvarden is proposed.
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