POLLEN MORPHOLOGY OF 9 SPECIES OF LEONURUS

Pollen morphology of 9 species and 1 variety in the genus Leonurus (Lamiaceae) was examined by means of LMand SEM.Pollen grains are ellipsoid or subspheroidal, while those of L.artemisia and L.artemisia var.albiflorus have beaks at two poles;tricolpate, furrows long and narrow, almost extend to the poles, sunken or not.The ornamentation of exine is reticulate, reticulate microperforate or microperforate.The results gave supports to the species' systematic position.