1. Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166-0299, U.S.A.; and Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, Sichuan 610041, P. R. China;, Email: Libing.Zhang@mobot.org
2. c/o The Herbarium, Royal Botanical Gardens, Kew, Richmond, Surrey, TW9 3AE, U.K.