A New Species, Pueraria xyzhuii (Leguminosae) from Yunnan, China, with Pollen Stainability and Pollen Morphology in Comparison to Related Species

摘要

A new species of Pueraria, P. xyzhuii H. Ohashi & lokawa, is described from Yunnan on the basis of a specimen, Henry 13626 (A). Its pollen Stainability was examined, discounting its presumable hybrid origin. The species is most similar to P. montana,but differs from it in having small leaves, 3-lobed leaflets, large branched inflorescences, long auriculate keel-petals, and perforate sculpture in pollen grains. The perforate sculpture is recognized for the first time in the genus. Pollen grains of P.xyzhuii are described and compared with its related species, P. bouffordii, P. edulis and P. montana (var. lobata, var. montana and var. chinensis).