FLORA OF VIETNAM Orchidaceae Habenaria calcicola Aver.
Phu Tho Prov., Tan Son Distr., Xuan Son Municipality, Du village, around point 21°06′57”N 104°57′17”E (Xuan Son national park). Primary broad-leaved closed wet forest on very steep rocky slopes and cliffs of low remnant mountains composed with highly eroded solid marble-like limestone at elevation 400-500 m a.s.l. Lithophytic and terrestrial tuberiferous herb on very steep rocky slope and on cliffs. Occasional. Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, L.T.Son HAL 12681a 16 February 2009 (holotype)
Flowered under cultivation in August-September 2009. Flowers with light sweet fragrance, light green, anthers yellow. Coll.: L.Averyanov HAL 12681aa (epitype)