Abstract:Pollen morphology of fourteen species, including 4 variants and 2 populations in the genus In-carvellea Juss. were studied. The results indicated that the pollen morphology of the species studied are very similar. Pollen grains of the species are found in monad. They are oblate to subspheroidal in shape and always have 6-10 colpi. Their size is from 28 to 51 um in diameter. The interspecific similarity in pollen morphology implicates that the genus is monophyletic. In the family Bignoniaceae, the genus Incar-villea belongs to the tribe Tecomeae, but it is obviously different from any other genera among the tribe in pollen morphology, which suggested that the treatment of the genus Incarvillea in tribe Tecomeae might not be very natural. In the other hand, the pollen characters have limited value inside the genus and only a few species can be differentiated from each other. According to the interspecific difference, the subgenus Pt-eroscleris can be distinguished from other subgenera but it is affinitive to the subgenus Incarvillea.