Based on the study of 160 numbers of orchids collected recently in 5 typical habitats of Huong Hoa and Da Krong districts, Quang Tri province, 128 species were enumerated. They represent atmost 35-40% of the total expected number of orchid species in this province. The richest genera in number of species are Dendrobium (14), Eria (9), Pholidota (6), Thrixspermum (6), Bulbophyllum (5) and Liparis (4). There are 5 new species records for the flora of Vietnam (Dendrobium phi, Hetaeria nitida, Pomatocalpa angustifolia, Thrixspermum pygmaeum, and Zeuxine grandis), two local endemics to the Central Annamese floristic province (Anoectochilus annamensis, and Trias nummularia), and 5 endemics to Vietnam (Bulbophyllum sigaldiae, Liparis tixieri, Listera latilabris, Vanilla annamica, and Zeuxinella vietnamica). More than half of number of species (77) are epiphytes, 33 species are terrestrial, 12 species are lithophytes and 6 species are saprophytes. All three Paphiopedilum species (P. appletonianum, P. callosum, and P. concolor) and two Anoectochilus species (A. annamensis and A. roxburghii) are listed in Appendix I of CITES and in Group IA of the Governmental Decree No 32/2006/ND-CP and needed to be protected from exploitation and use for commercial purpose. Some species of Dendrobium, Coelogyne, Eria, and Phalaenopsis are subjected to limited exploitation and use for commercial purposes.
Nguyen Manh Hung
Forest Protect Department of Quang Tri
Nguyen Tien Hiep
IEBR - VAST
Komarov Botanical Insitute, Russian Academy
Phan Ke Loc
(Proceedings of 3rd National Scientific Conference on Ecology and Biological Resources, Hanoi 22th October 2009 - IEBR)