ORCHIDACEAE - China

280EPIDENDROIDEAE● Humus-rich places in dense forests; ca. 1500 m. SE Yunnan(Malipo).Among the current authors, Cribb observes that this is unlikely tobe a mycotrophic species, given that it has typical autotrophic roots, notthe rhizomatous structure found in all mycotrophic orchids. It also hasgreen capsules, thus it is photosynthetic at least when in fruit. Thistaxon is close to Cymbidium lancifolium but probably warrants specificrank. It is not known whether it has been grown in cultivation to ascertainif it develops leaves after flowering. As mentioned under C. rhizomatosum,elongate rhizomes are found in C. lancifolium var. papuanum(a synonym of C. lancifolium in the present treatment). On theother hand, Chen observes that the flowers of C. multiradicatum differgreatly from either C. lancifolium or other species, showing little relationshipwith them.92. ACRIOPSIS Blume, Bijdr. 376. 1825.合 萼 兰 属 he e lan shuChen Xinqi ( 陈 心 启 Chen Sing-chi); Jeffrey J. WoodHerbs, epiphytic. Rhizome creeping, branched; roots slender, branched, fleshy, with ascending catch-roots. Pseudobulbscrowded, ovoid or subovoid, with 2 or 3 nodes, covered at base by slender, silvery sheaths, 2- or 3-leaved. Leaves apical, midribsunken above, prominently raised beneath, petiolate. Inflorescence racemose or paniculate, heteranthous, many flowered, arisingfrom base of pseudobulb; peduncle terete, long; floral bracts persistent. Flowers not resupinate, twisted, widely open, small. Sepalslanceolate, concave at apex; lateral sepals fused to form a synsepal. Petals spreading, oblong to obovate; lip 3-lobed, pandurate toentire; disk 2-keeled. Column straight to sigmoid; stelidia 2, long, parallel, porrect or decurved; rostellum beaklike, bifurcate; pollinia4, connate in 2 pairs.Six species: N India, Myanmar, Thailand, and Indochina eastward through Malaysia and Indonesia to the Philippines, New Guinea, SolomonIslands, and Australia; one species in China.1. Acriopsis indica Wight, Icon. Pl. Ind. Orient. 5: t. 1748.1851.合 萼 兰 he e lanRoots white, ca. 1.5 mm in diam., well developed, fleshy.Pseudobulbs oblong-ovoid, 2–2.5 × 1–1.3 cm, often narrowedat base, usually with 5–8 internodes, with lacerate sheaths onnodes. Leaves terminal, 2 or 3, appearing after anthesis; leafblade narrowly oblong, 7–7.5 × 0.3–0.4 cm, base slightly contractedinto a short petiole, apex acuminate. Inflorescence paniculate,arising from basal node of pseudobulb, erect orslightly drooping, much longer than leaves, 11–38 cm, laxlymany flowered; peduncle 6–7 cm, with 2 or 3 small sheaths;floral bracts 0.5–2.5 × 0.3–0.8 mm. Flowers yellowish green,Cytheris Lindley.slightly spotted with purple, lip white; ovary 2.3–2.5 mm. Dorsalsepal suboblong, 4–5 × ca. 1 mm, 3-veined, base contracted,slightly concave, apex acuminate; synsepal similar to dorsal sepal,but slightly larger, with 5 inconspicuous veins. Petals obovate-spatulate,3–4 × ca. 1.3 mm, margin sometimes irregularlycrisped, apex obtuse; lip suboblong, 4–5 × ca. 1.4 mm, adaxiallywith 2 suborbicular central lamellae, apex obtuse or subrounded.Column ca. 4 mm, stelidia ca. 0.8 mm, without foot;anther cap ca. 0.7 mm in diam.; pollinia narrowly obconic, ca.0.7 mm. Capsule ellipsoid or globose. Fl. May.Epiphytic on trunks of Quercus trees; ca. 1300 m. S Yunnan[Cambodia, Indonesia, Laos, Malaysia, Myanmar, ?NE India, Philippines,Thailand, Vietnam].93. NEPHELAPHYLLUM Blume, Bijdr. 372. 1825.云 叶 兰 属 yun ye lan shuChen Xinqi ( 陈 心 启 Chen Sing-chi); Jeffrey J. WoodHerbs, terrestrial (rarely epiphytic). Rhizome creeping; roots sometimes villous, with root hairs. Pseudobulbs ascending, articulateat junction with petiole and peduncle, scales tubular, membranous, often soon caducous. Leaf 1 per pseudobulb, convolute,petiolate; petiole suborbicular, channeled, not sheathing; blade ovate to cordate, main veins prominent, often mottled. Inflorescencean erect raceme, unbranched, 2–16-flowered; peduncle and rachis usually elongating after anthesis, peduncle with few internodes,scales persistent, tubular; rachis erect, unbranched; floral bracts sessile, not tubular. Flowers not resupinate, turned to all sides, mostopen simultaneously. Sepals reflexed or not, lanceolate to linear. Petals reflexed or not, lanceolate to linear, falcate or not; lip immobile,broadly attached to column foot, parallel to column, blade flat or shallowly concave, or basal half tubular and open at upperside and front part recurved, entire or 3-lobed; disk with central 3 veins either keeled or with a platelike appendage or 1 or more rowsof fleshy papillae or laciniae, adaxially glabrous, velvety hairy or with patches of hairs or both; spur clavate, cylindric, or saccate.Column with a flat foot, without a spur; anther cap imperfectly 4-locular, with 2 horns; pollinia 8 in 2 groups of 4, solid, with caudicles,stipe and viscidium absent. Capsule with persistent perianth.About 15 species: from India, Bhutan, Myanmar, Thailand, and Indochina north to China and Japan, eastward through Malaysia and Indonesiato the Philippines; one species in China.Nephelaphyllum pulchrum Blume (Bijdr. 373. 1825) was recorded from Hainan (Baisha and Changjiang) by X. Q. Song, Q. W. Meng and Y. B.