Apocynaceae (Asclepiadaceae) Hoya sp. Phu Tho Prov., Tan Son Distr., Xuan Son Comm., Ten shale mountain, around point 21006′55” N, 104056′08” E, 900-1100 m, about 3 km to SW of Du vill., 21007′26” N, 104057′29” E. In undisturbed and slightly logged primary evergreen broad-leaved forests on slopes of shale mountains. Epiphyte; flowers white.
HAL 11253 18 Oct 2007 Loc’s photos: 23370a-23370f Coll.: P.K. Loc, N.T. Vinh & L.P. Ngau
Grant from MOST, Council for Natural Science, Section of Life Sciences (6.077.06), Vietnam