Calanthe metoensis Z. H. Tsi & K. Y. Lang, Acta Phytotax. Sin. 16(4): 129. 1978.墨脱虾脊兰 mo tuo xia ji lan

Plants 30-50 cm tall. Rhizome inconspicuous. Pseudobulbs conic, small, ca. 1.5 cm in diam., enclosed in leaf sheaths. Leaves 3, well developed and spreading at anthesis, not deciduous; blade narrowly elliptic, 25-30 × 3.5-9.5 cm, with 5 main veins, apex acute; petiole-like base sheathing, usually forming a pseudostem to ca. 9 cm long and ca. 1 cm in diam. Scapes 1 or 2, arising from leaf axils, erect, 30-50 cm, densely puberulent; rachis to 12 cm, laxly 2-10-flowered; floral bracts persistent, lanceolate, 7-20 mm, glabrous. Flowers pink; pedicel and ovary 15-30 mm, puberulent. Dorsal sepal elliptic, ca. 15 × 7 mm, sparsely puberulent, 5-veined, apex apiculate; lateral sepals ovate, oblique, ca. 15 × 6-8 mm, sparsely puberulent, 5-veined, apex apiculate. Petals linear, ca. 14 × 2 mm, glabrous, 3-veined, apex acute; lip adnate to entire length of column wings, ca. 12 × 10 mm, 3-lobed; lateral lobes ovate-triangular, ca. 8 mm across their apices, margin sometimes sparsely toothed, apex subacute; mid-lobe obovate-cuneate, ca. 6 × 6 mm, margin fimbriate, apex rounded and apiculate; disk with 3 ridges; spur cylindric, ca. 15 × 2 mm, outside sparsely puberulent, attenuate toward apex, apex obtuse. Column ca. 5 mm, thick, wings dilated and triangular, embracing stigma; rostellum 2-lobed; lobes falcate-triangular, ca. 1.2 mm; pollinia clavate, unequal in size, larger ones ca. 2 mm, ± arcuate, smaller ones straight. Fl. Apr-Aug.

● Forests; 2200-2300 m. SE Xizang, W Yunnan.