19. Calanthe dulongensis H. Li, R. Li & Z. L. Dao, Acta Phytotax. Sin. 41: 267. 2003.
独龙虾脊兰 du long xia ji lan
Plants ca. 50 cm tall. Rhizome ca. 6.5 cm, ca. 1 cm in diam. Pseudobulbs subovoid, ca. 1.5 × 2 cm, enclosed in sheaths. Leaves 3, subbasal, well developed at anthesis, not deciduous; blade elliptic or obovate-elliptic, 16-22 × 4.5-7.5 cm, glabrous, apex acute or acuminate; petiole-like base sheathing, 14-18 cm, usually forming a pseudostem. Scape axillary, to 38 cm, densely puberulent, with 2 or 3 sheaths; rachis ca. 16 cm, laxly 20-25-flowered; floral bracts persistent, white, lanceolate, 9-11 mm, abaxially puberulent. Flowers yellow-green, lip yellow and flushed white; pedicel and ovary 18-25 mm, densely puberulent. Dorsal sepal oblong-elliptic, ca. 18 × 6 mm, apex acute; lateral sepals elliptic, ca. 15 × 4 mm, apex mucronate. Petals obovate-lanceolate, ca. 15 × 5 mm; lip adnate to column wing, base clawed, deeply 3-lobed; lateral lobes narrowly oblong, ca. 6 × 2 mm; mid-lobe reniform, ca. 5 × 7.5 mm, apex broadly emarginate and mucronate in sinus; disk with 3 golden yellow, globose, wartlike calli near base; spur straight, yellow, cylindric, ca. 5.5 mm, outside sparsely puberulent. Column ca. 8 mm, glabrous; rostellum 2-lobed. Fl. Apr.
● Mixed forests; 1900-2300 m. SW Yunnan.