Abstract

• The pollen morphology of some Blumea species distributed in Mandalay Area was undertaken. The samples of 8 species belonging to 1 genus under 1Tribes were collected from January to June during the year 2018. The morphological characters of pollen grains of each species were also studied. The types of pollen grains were tricolpate, triporate, tricolporate and tetracolporate. Three species were tricolpate and triporate. Only one species were tricolporate and tetracolporate. The exine ornamentation in pollen was found to be all echinate. The shapes of pollen were spheroidal, prolate spheroidal, oblate spheroidal and subprolate. Four species were spheroidal, two species were subprolate, only one species were prolate spheroidal and oblate spheroidal. The size of pollen were small or medium. Five species were medium and three species were small. An artificial key to the species were also constructed. The pollen photomicrographs of each species were presented by polar view and equatorial view.