39. Calanthe trifida Tang & F. T. Wang, Acta Phytotax. Sin. 1: 87. 1951.
裂距虾脊兰 lie ju xia ji lan
Plants ca. 75 cm tall, without distinct rhizome. Pseudobulbs subconic, short, 1-2 cm in diam., with 2 or 3 sheaths. Leaves 3, well developed and spreading at anthesis, not deciduous; blade elliptic, ca. 22 × 10 cm, papery, 5-veined, apex acuminate; petiole-like base 30-37 cm, usually forming a pseudostem to 23 cm. Scape arising from leaf axil, upper part densely puberulent; rachis ca. 30 cm, laxly many flowered; floral bracts persistent, lanceolate, ca. 5 mm, apex acute. Flowers pink; pedicel and ovary ca. 20 mm, puberulent. Sepals similar, elliptic, ca. 10 × 4 mm, abaxially puberulent, 5-veined, apex shortly acuminate; lateral sepals oblique, usually slightly shorter than dorsal sepal. Petals narrowly elliptic, ca. 7 × 2.2 mm, abaxially puberulent, 3-veined, apex obtuse; lip adnate to entire length of column wings, flabellate, ca. 5.5 mm, 3-lobed; lateral lobes broadly oblong, shorter and broader than mid-lobe, ca. 7 mm across their apices, apex subtruncate and ± incurved; mid-lobe suboblong, ca. 3.5 × 2 mm, apex acute; disk with 3 ridges, central one thicker and extending to apex of mid-lobe; spur cylindric, ca. 6 mm, outside puberulent, apex obtuse and slightly 2-lobed. Column ca. 4 mm, ventrally sparsely puberulent, wings decurrent to lip; rostellum 2-lobed; lobes ca. 1 mm; anther cap beaked; pollinia narrowly ovoid, equal in size, ca. 1.5 mm. Fl. Feb-Mar.
Evergreen broad-leaved forests; ca. 1700 m. SW Yunnan [Myanmar].