ORCHIDACEAE - China

342EPIDENDROIDEAEole 5–12 cm, grooved. Inflorescence laxly 10–15-flowered; peduncle30–66 cm; rachis 6–16 cm, glabrous; floral bracts palereddish green, broadly ovate, 1.5–2 × 1.2–1.5 cm, papery, subacute.Flowers white, with pale brown lip and reddish brownanther cap; pedicel and ovary 6–7 mm, glabrous. Sepals subsimilar,5-veined; dorsal sepal ovate-oblong, 12–14 × 4–5mm, apiculate; lateral sepals nearly narrowly ovate-lanceolate,oblique, 15–18 × 5–6 mm, apiculate. Petals elliptic-oblong, 15–18 × 2–3 mm, 3-veined, oblique, acute to apiculate; lip 12–14 ×5–6 mm, deeply constricted at middle, spurred, entire; hypochileovate-elliptic, concave at base; epichile reniform, emarginate;disk with 3 thickened, keeled veins on mesochile; spurarising from between sepals, cylindric, curved-porrect. Column8–10 mm, upper wings 2–3 mm wide, glabrous. Capsule erect,ellipsoid, 1.5–2 cm × 8–10 mm. Fl. Jul–Aug, fr. Oct.Epiphytic on tree trunks in forests or lithophytic on rocks alongvalleys; 700–2700 m. NW to SE Yunnan [Bhutan, NE India].117. ISCHNOGYNE Schlechter, Repert. Spec. Nov. Regni Veg. 12: 106. 1913.瘦 房 兰 属 shou fang lan shuChen Xinqi ( 陈 心 启 Chen Sing-chi); Jeffrey J. WoodHerbs, epiphytic or lithophytic. Rhizome creeping. Pseudobulbs borne close together, prostrate basally, cylindric, 1-leaved. Leaflanceolate-elliptic, obtuse, thinly leathery, petiolate. Inflorescence synanthous to proteranthous, 1-flowered, erect; floral bracts persistent,shorter than ovary. Flowers white, lip with 2 purple spots at base and with a yellow blotch at base of mid-lobe, resupinate.Sepals free, linear-lanceolate; lateral sepals abruptly pouchlike and basally dilated. Petals linear; lip basally spurred, 3-lobed, ecallose;spur concealed by bases of lateral sepals. Column dilated and flattened apically, without stelidia, foot absent; pollinia 4, broadlyobovoid, caudiculate; stigma cup-shaped. Capsule ellipsoid.● One species: China.1. Ischnogyne mandarinorum (Kraenzlin) Schlechter, Repert.Spec. Nov. Regni Veg. 12: 107. 1913.瘦 房 兰 shou fang lanCoelogyne mandarinorum Kraenzlin, Bot. Jahrb. Syst. 29:269. 1901; Pleione mandarinorum (Kraenzlin) Kraenzlin.Pseudobulbs brown when dry, cylindric, 1.5–3 cm × 2.5–3.5 mm, longitudinally wrinkled when dry, apically ± hookshaped.Leaf suberect, lanceolate-elliptic, 4–7 × 1.2–1.5 cm,thinly leathery, obtuse; petiole 1–2 cm. Inflorescence 5–7 cm;floral bracts ovate, 5–7 mm, membranous. Flower solitary,white, lip with 2 purple spots at base and with a yellow blotchDendrorkis Thouars.at base of mid-lobe; pedicel and ovary 1–2 cm. Sepals linearlanceolate,28–32 × 3–3.5 mm; lateral sepals with basal pouchca. 3 mm. Petals linear, ca. 30 × 2.5 mm; lip narrowly obovate,ca. 30 × 8 mm, attenuate toward base, base spurred, distally 3-lobed and slightly shoulderlike; lateral lobes small; mid-lobesubquadrate, slightly undulate, apex slightly emarginate andapiculate; spur ca. 3 × 1.5 mm. Column ca. 2.5 cm; wing ca. 2.5mm wide on each apical side. Capsule ellipsoid, 1.6–2 cm × 7–9 mm. Fl. May–Jun, fr. Jul–Aug.● Epiphytic on trees and lithophytic on rocks in forests or alongvalleys; 700–1500 m. Chongqing, S Gansu, W Guizhou, W Hubei, SShaanxi, Sichuan.118. POLYSTACHYA Hooker, Exot. Fl. 2: ad t. 103. 1824, nom. cons.多 穗 兰 属 duo sui lan shuChen Xinqi ( 陈 心 启 Chen Sing-chi); Jeffrey J. WoodHerbs, epiphytic or lithophytic. Stem erect, often pseudobulbous or fusiform, simple or superposed, with 1 to several leaves.Leaves conduplicate, often narrowly oblong or oblong, sheathing and articulate at base. Inflorescences terminal, racemose or paniculate,few to many flowered; peduncle often enclosed in scarious sheaths. Flowers not resupinate, small or sometimes medium-sized.Sepals connivent or spreading; dorsal sepal free; lateral sepals adnate to column foot forming a mentum. Petals smaller, usuallylinear; lip superior, entire or 3-lobed, base articulate with column foot, spurless; disk often farinaceous (pseudopollen). Column short,with conspicuous column foot; pollinia 4 (unequal in size, in 2 pairs) or 2 (each deeply cleft), waxy, with a small stipe and a viscidium.About 200 species: centered in Africa, some species in tropical America, and one pantropical species widespread in Asia from Sri Lanka andIndia eastward to Sulawesi and the Philippines, including China.1. Polystachya concreta (Jacquin) Garay & H. R. Sweet, Orquideologia9(3): 206. 1974.多 穗 兰 duo sui lanEpidendrum concretum Jacquin, Enum. Syst. Pl. 30. 1760;Dendrorkis purpurea (Wight) Kuntze; Onychium flavescensBlume; Polystachya flavescens (Blume) J. J. Smith; P. pleistanthaKraenzlin; P. purpurea Wight; P. purpurea var. lutescensGagnepain.Plants 10–29 cm tall. Pseudobulbs usually slightly compressed,ovoid to conic, 1–2 × 0.5–1.5 cm, with 2 or 3 nodes.