Species diversity and flowering phenology of Orchidaceae in Huanglong Valley, Sichuan
Peng Li, Siyuan Tang, Li Dong, Yibo Luo, Yong Kou, Xiaoqin Yang, Holger Perner
Biodiv Sci . 2005, (3): 255 -261 .  DOI: 10.1360/biodiv.050030