Thuy tung (Glyptostrobas pensilis) is named in Vietnam Red Book and according to the World Wildlife Foundation(WWF), this is among the most-hunted plants. Thuy tung is distributed in many provinces from the north to the south of Vietnam but at present there are less than 150 trees in the Central Highlands province of Dak Lak. Most of them are degenerated seriously.
Glyptostrobus pensilis is a medium-sized to large tree, reaching 30m tall and with a trunk diameter of up to 1m, possibly more. The leaves are deciduous, spirally arranged but twisted at the base to lie in two horizontal ranks, 5-20mm long and 1-2mm broad, but 2-3mm long and scale-like on shoots in the upper crown.
The cones are green, maturing to a yellow-brown, pear-shaped, 2-3 cm long and 1-1.5cm diameter, broadest near the apex. They open when mature to release small, 5-6mm long, winged seeds.