FLORA OF VIETNAM Convallariaceae Tupistra khangii sp.nov.
Son La Prov., Van Ho Distr., Tan Xuan Municipality, Cot Moc village, territory of Xuan Nha natural reserve, eastern slopes of Pha Luong Mountain.
Remnants of primary and secondary broad-leaved evergreen humid forest on very steep mountain slopes composed by shale and sandstone at elevation about 1000 m a.s.l. around point 20°40′33.3″N 104°39′00.3″E.
Large lithophytic clustering herb on large mossy stream boulders along narrow shady rocky stream canyon. Flowers white, anthers light yellowish. Occasional.