The pollen grain of all the species of the genus Sibbaldia (Rosaceae) has been examined by light microscope (LM) and Scanning Election Microscope (SEM). The pollen grains are prolate spheroidal to prolate, Colpi are long and thin. On the basis of size, the pollen grains are divided into two groups. Linnaeus (1737) named the genus Sibbaldia after an Edinburgh University botanist Robert Sibbald (1643-1720). Taxonomically the genus Sibbaldia belongs to the Tribe Potentillae of family Rosaceae and sub-family Rosoideae, (Hutchinsin, 1964). This taxa was systematically reviewed by different workers at different time in different parts of the world, which includes Seringe (1825), Endlicher (1840), Bunge (1829), Hooker (1878), Focke (1888), Murvjova (1936), Chatterjee (1938), Tuzepzuk (1941), Hutchinson (1964), Airy Shaw (1973), Sojak (1970) and Dixit & Panigrahi (1981). Rajput et al, (1997) while reviewing this genus at the global level recognized 10 species.
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