INFRAGENERIC RELATIONSHIPS WITH POGOSTEMON DESF. (LABIATAE)

Cladistic and phenetic analyses of the morphology of 79 species of Pog ostemon Desf. sensu lato have been undertaken. The cladistic analysis included 135 character state differences encoded as 41 binary or multi state characters. The phenetic analysis included 52 metric variables a nd 54 binary variables. There is a very good correspondence between th e results of cladistic and phenetic analyses based on different data s ets. The existence of several clearly marked clades/clusters has been demonstrated. Some groups/clades are similar to those previously taxon omically recognized but the relationships and membership of infra-gene ric groups have been clarified by these analyses, validating a revised infra-generic classification which has been proposed. (C) 1998 The Li nnean Society of London.