Gastrochilus calceolaris (Buch.-Ham. ex Sm.) D. Don
Hoa Binh Prov., Lac Son Distr., Tu Do Municipality, Coi Gao village, around point 20°26’07”N 105°17’19”E. Secondary rich forest on steep rocky slopes of limestone mountain at elevation about 600 m a.s.l. Epiphyte on tall mossy tree. Flowers yellowish with brownish spots. Occasional.