Pollen morphology of the genus Impatiens L. (Balsaminaceae) and its systematic implications

Pollen morphology of 18 species from the genus Impatiens collected different localities in Nilgiris, Tamil Nadu was evaluated using scanning electron microscopy (SEM) during period February 2017 to November 2019. From observation pollen it found be structurally monad; prolate, sub-prolate and prolate-spheroidal equatorial view; circular, rectangular, triangular, quinquangular, elliptic quadrangular polar view. The apertures varied dicolpate, tricolpate tetracolpate. main ornamentation type reticulate most except fruticosa which showed echinate ornamentation. variations structure within were useful for identification classification Impatiens. high structural diversity renders important taxonomic value differentiation.