Pollen grains morphology of 14 genera and 27 species of Euphorbiaceae (Actinostemon klotzschii (Didr.) Pax, Alchornea sidifolia Müll. Arg., A. triplinervia (Spreng.) Müll. Arg., Croton floribundus Spreng., C. fuscescens Spreng., C. glandulosus L., C. lundianus ( Didr.) Müll. Arg., C. organensis Baill., C. salutaris Casar., C. vulnerarius Baill., Dalechampia triphylla Lam., Euphorbia heterophylla L., E. hirta L., E. hyssopifolia L., E. peplus L., Gonatogyne brasiliensis Müll. Arg., Hieronyma alchorneoides Allemão, Maprounea guianensis Aubl., Pera obovata (Klotzsch) Baill., Phyllanthus caroliniensis Walt., P. niruri L., P. tenellus Roxb., Plukenetia serrata (Vell.) L.J. Gillespie, Sapium glandulosum (L.) Morong, Savia dictyocarpa Müll. Arg., Sebastiania klotzschiana (Müll. Arg.) Müll. Arg. and S. serrata (Baill.) Müll. Arg., ocurring in the "Reserva do Parque Estadual das Fontes do Ipiranga" was studied. Descriptions, illustrations, and additional observations are presented for all species studied, as well as keys for some taxa only.
Euphorbiaceae s.l.; pollen flora; pollen grain
