Perennial herbaceous plant, 0,5-1,5m high. Root-stock horizontal, slender. Leavesalternate, linear, amplexicaul, acute-alternate at the apex. Inflorescence in radicalraceme. Flowers white, lip yellow, spotted with purple. Capsule 3-valved, with soft spines, brown red when ripe. Flowering period: May - June (Laos) Perennial herb, 0.5-l.5m. high. Root-stock honzontal, slender. Leaves altemate, linear, amplexicaul, acute-attenuate at the apex. Inflorescence in radical raceme; flowers white, lip yellow, spotted with purple. Capsule 3-valved, with soft spines, brown red when ripe. (Vietnam)