Abstract

• The taxonomical and pollen morphological studies of 10 species of the Family Rosaceae were studied. The specimens were collected 1 species such as Docynia indica (Wallich) Decaisne. in Pinlaung township and 4 species like Rubus ellipticus Smith., Rubus ellipticus var. obcordatus (Francact) Focke., R. molucanus L. & Pyrus communis L. in Aungban township and 5 species namely Chaenomeles japonica (Thunb.) Lindley, Prunus cerasoides D. Don., P. ceylanica (Wight) Miq., P. communis Huds. & P. persica (L.) Batsch., in Lashio township. The genera Chaenomeles, Docynia and Pyrus were belonging to Maloideae, Rubus was belonging to Rosoideae and Prunus was belonging to Prunoideae. All the specimens were collected from Southern and Nothern Shan State from September 2016 to October 2017. The measurements were based on at least 20 randomly selected, fully developed pollen grains per specimens. All the pollen grains of study species were tricolporate except from Rubus molucanus L., which was tri to tetracoporate and Prunus cerasoides D. Don. that possessing tricolpate in aperture. All pollen grains were prolate spheroidal in shape. The pollen size was small in 4 specie such as Docynia indica (Wallich) Decaisne., Pyrus communis L., Rubus ellipticus Smith. & Prunus communis Huds. and the remaining 6 species were medium. All investigated pollen grains were characterized by striate type of sculpturing. In this research, taxonomic description, the pollen morphological characters and photographs for every species were stated.