Petrosaviaceae Hutch. Protolyrion sakuraii Makino S. Vietnam, Prov. Kontum. Evergreen primary forest at 1900-2000 m alt. on W slope of Ngoc Linh mountain system on elevation to Ngoc Gua peak. Yellowish white saprophyte in dry forest with Lithocarpus and Quercus sp. at 1800 m alt. Flowers white ? Rare, only at alt. around 1800-1850 m in dry forests with domination of Fagaceae ssp. VH 1301 10.04.1995 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5094-93)
Participants: L. Averyanov, N.T. Ban, N. Q. Binh, A. Budantzev, L. Budantzev, N.T. Hiep, D.D. Huyen, P.K. Loc, N.X. Tam, G. Yakovlev