Incomplete contents: v. 3(pt. 2): The grasses of Bhutan / H.J. Noltie; v. 3(pt. 3): The orchids of Bhutan / N.R. Pearce & P.J. Cribb (Description: ix, 643 p., 32 p. of plates : ill. (some col.), map); Notes: v. 2(2): has subtitle: Including a record of plants from Sikkim amd Darjeeling; Errata tipped in v. 3, pt. 3.