Pollen morphology of Acalypha L. (Euphorbiaceae) with emphasis on Brazilian species from Bahia

We investigated the pollen morphology of eight species Acalypha occurring in Bahia State, Brazil. Flower buds were collected from specimens deposited CEPEC and HUEFS herbaria. Pollen samples acetolyzed analyzed using both light scanning electron microscopy. The grains examined optical microscopy found to be small brevicolporate, with three six apertures elevations fastigium, had a psilate scabrate exine. Scanning revealed presence supratectal elements Ubisch bodies, evidenced types based mainly on exine ornamentation: microrugulate-scabrate (slightly rugulate-scabrate), areolate-rugulate, microechinate. This study provides new data interpretations for genus Acalypha, comments palynological relationships between its sister group Mareya, next most closely related (Spathiostemon).