A NEW SPECIES OF THE GENUS TUPISTRA (CONVALLARIACEAE),WITH REFERENCE TO ITS KARYOTYPE AND POLLEN MORPHOLOGY
开口箭属一新种及其核型和花粉形态

A species of the genus Tupistra, T. pingbianensis J. L. Huang et X. Z. Liu, is described as new, and its karyotype and pollen morphology are reported. The bimodal kary-otype of this species is formulated as 2n=38 = 14m 10sm 8st 6t, and pollen grains are spheroidal, inaperturate, with rugulate exine sculpture. Based on its floral structure, kary-otype and pollen morphology, T. pingbianensis J. L. Huang et X. Z. Liu is considered phy-logenetically closely related to T. fungilliformis Wang et Liang. Whether the repense rhizome , solitary leaves of T. pingbianensis J. L. Huang et X. Z. Liu indicate a close relationship between the genus Tupistra and the genus Aspidistra needs further studies.