FLORA OF VIETNAM
Orchidaceae
Dendrobium trigonopus Rchb.f.

Son La Prov., Son La City, Chieng Co Municipality, around point 21°18′24”N 103°52′53”E. Highly degraded primary evergreen dry open broad-leaved forest on very steep rocky slopes and on tops of remnant mountain composed with highly eroded marble-like solid crystalline limestone at elevation 800-900 m a.s.l. Epiphyte on old mossy gnarled tree on tops of ridge. Rare.
CPC 1141a 20 December 2010
Coll.: L.Averyanov, P.K.Loc, P.V.The, N.T.Vinh.

F. et coll. under cultivation at 15 Feb. 2011
Flowers with sweet honey fragrance; sepals and petals yellow with green tint; lip yellow-green, with yellow margin; lip side lobes with fine brown-reddish streaks,; column yellow with brown-reddish streaks; operculum yellow-green; ovary green, strongly keeled. L.Averyanov. Photos. Flowered in May – June 2016. Flowers bright rich yellow. Associated living specimens:
CPC 1141b Vanda lilacina?