Gesneriaceae Dumort. Slackia tonkinensis Pell. S. Vietnam, Prov. Kontum. NW slopes of Ngoc Linh mountain system at 2200-2300 m alt. Pprimary close evegreen forest on strong cliffs and shadow outcrops. Herb up to 0.2 m high. VH 484 06.03.1995 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