This volume includes results of taxonomic studies mainly based on the collections by the fifth botanical expedition to Eastern Himalaya in 1972 organized by the University of Tokyo and those by Dr. Hiroo Kanai during his stay in Nepal from 1969 to 1971 as a Colombo Plan Advisor to the Department of Medicinal Plants, H.M.G. of Nepal. It also contains data supplementary to the preceding two reports, which were published on the basis of our expeditions in 1960, 1963 (two times), 1964, 1967 and 1969. The main purposes of the present research were stated in the first volume, and critical comparative studies on corresponding taxa in Japan and Himalaya have continued, though a number of results of our investigations were published elsewhere, as cited in the systematic enumeration or bibliography in the former and present volumes.