FLORA OF LAOS
Orchidaceae
Dendrobium gratiosissimum Rchb.f.

Vientiane Prov., Kasi Distr., Namken village, Phachao Mt., around point 19°18′45.5”N 102°22′31.4”E.

Primary broad-leaved evergreen forest on very steep rocky slopes of remnant mountain composed with highly eroded solid crystalline limestone at elevations 1500-1750 m.

Epiphyte on mossy trees on shady cliff at elevation 1200 m. Flowers white, tips of tepals purple, lip with yellow spot at center and 2 purple-violet small spots at base. Not common.

LA-VN 772 24 March 2013
Coll.: L.Averyanov, N.S.Khang, S.Lorphengsy