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É estudada a morfologia polínica de duas espécies de Linaceae-Humirioideae e três do gênero Erythroxylum. Todas ocorrem no sul do Brasil, exceto Humiria balsamifera, cujo pólen foi examinado visando as relações filogenéticas entre as espécies das duas famílias. Vantanea e Erythroxylum pertencem a um mesmo tipo polínico, enquanto que H. balsamifera é diferente, tanto nas aberturas quanto na estratificação da exina. The pollen morphology of two species of Linaceae-Humirioideae and three species of the genus Erythroxylum has been described. All the specimens studied occurin the southern part of Brazil, except Humiria balsamifera whose pollen morphology has been studied in order to establish the phylogenetic relationships between the species of the two familes. Vantanea and Erythroxylum belong to the same pollen type, but H. balsamifera is different with regard to the apertures and exine stratification

Catálogo sistemático dos polens das plantas arbóreas do Brasil meridional XXII: Linaceae humirioideae e erythroxylaceae