大黄花虾脊兰 da huang hua xia ji lan

Calanthe discolor Lindley f. sieboldii (Decaisne ex Regel) Ohwi; C. discolor var. sieboldii (Decaisne ex Regel) Maximowicz; C. kawakamii Hayata; C. striata (Swartz) R. Brown f. sieboldii (Decaisne ex Regel) Ohwi; C. striata var. sieboldii (Decaisne ex Regel) Maximowicz; C. takeoi Hayata.

Plants 30-55 cm tall. Rhizome elongate, thick. Pseudobulbs small, with 5-7 sheaths. Leaves 2 or 3, well developed at anthesis, not deciduous; blade broadly elliptic, 20-60 × 7.5-15 cm, apex acute or mucronate; petiole-like base 6-18 cm, usually forming a pseudostem 4-14 cm long and ca. 1.5 cm in diam. Scape 40-50 cm, sparsely puberulent; rachis 6-15 cm, laxly to subdensely 6-13-flowered; floral bracts persistent, lanceolate, ca. 10 mm, glabrous, apex acuminate. Flowers bright yellow, large, slightly fleshy; pedicel and ovary 10-15 mm, sparsely puberulent. Dorsal sepal elliptic, 22-30 × 10-15 mm, apex acute; lateral sepals ovate-oblong, oblique, 18-28 × 8-14 mm, apex acute. Petals narrowly elliptic, 19-24 × 7-9.5 mm, base narrowed, apex acute; lip adnate to entire length of column wings, spreading horizontally, yellow, mottled red at base, deeply 3-lobed; lateral lobes ovate or falcate-obovate, oblique, 10-15 × 5-8 mm, apex obtuse-rounded; mid-lobe nearly elliptic, 9-13 × 5-9 mm, apex mucronate; disk with 5 ridges and 2 rows of white short hairs at base; lateral 2 ridges fleshy, central 3 extending almost to apex of mid-lobe; spur ca. 8 mm, inside puberulent. Column ca. 5 mm, thick; rostellum 2-lobed; pollinia with short caudicles, attached to an elliptic viscidium. Fl. Feb-Mar. 2n = 40.

Forests; 1200-1500 m. Hunan, SW Taiwan [Japan (Ryukyu Islands), Korea].