A Revision of Plants Hitherto Referred to Bistorta Milletii (Polygonaceae) in Nepal

Abstract

Plants hitherto referred to Bistorta milletii H.Lév. in Nepal are different from the typical B. milletii described from SW. China. The Nepalese plants include two distinct species. One should be called as Bistorta confusa (Meisn.) Greene, which has been overlooked or misapplied to different species in prevoius works, and is growing in eastern to central Nepal eastward from Kali Gandaki Valley. The other is a new species, Bistorta rubra Yonekura & H.Ohashi, and is distributed from northern India to western Nepal westward from Kali Gandaki Valley. Bistorta rubra is considered to be related to B. sherei H.Ohba & S.Akiyama in central to eastern Nepal. Bistorta milletioides H.Ohba & S.Akiyama, distinct from the above taxa, is proved to be distributed in central to eastern Nepal.