Abstract: Morphological studies of pollen of thirteen species of Lycoris Herb. in China were reported in this paper. The result shows that pollen grains of Lycoris Herb. are all zygomorphic; navicular or reniform is in equitorial view, and oval or long oval in polar view; monocolpate. The exine ornamentation are reticulate CR ( i.e. coarsely reticulate) or FR ( i.e. finely reticulate). Under SEM, several little papillae or tubercles can be seen at the bottom of luming or the murus. According to this, we divide them into 4 subtypes: NPCR ( i.e. no papillae coarsely reticulate) 、PCR ( i.e. papillae coarsely reticulate) 、NPFR ( i.e. no papillae finely reticulate) 、PFR ( i.e. papillae finely reticulate). Investigations on pollen grains can provide significant data for studies of interspecific relationships and systematics of Lycoris Herb.

Key words: Lycoris Herb., Pollen morphology, Interspecific relationship