ORCHIDACEAE - China

456EPIDENDROIDEAEleathery, margin ± undulate, apex unequally bilobed. Inflorescences2 or 3, lateral, pendulous, 3.5–6 cm, unbranched andracemose or occasionally with 1 or 2 branches; rachis fleshy,ribbed, densely many flowered; floral bracts reflexed, broadlyovate-triangular, ca. 1 mm, acute, often adnate to rachis. Flowerswaxy yellow, rather fleshy, dorsal sepal with 2 brown bandsat base, lateral sepals with U-shaped brown spots at base andwith 2 brown bands above middle, petals with 2 brown bands atbase; pedicel and ovary ca. 2.5 mm. Dorsal sepal obovate, ca. 5× 2 mm, apex rounded; lateral sepals incurved, slightlyobliquely obovate, ca. 4.5 × 2.5 mm, obtuse-rounded. Petalsobovate-elliptic, ca. 3 × 1.8 mm, obtuse; lip spurred at base, 3-lobed; lateral lobes erect, ovate; mid-lobe reniform-triangular orsubrhombic, ca. 1.5 × 1.5 mm, fleshy, apex obtuse; spur subglobose,ca. 2 × 2 mm, inside with a ligulate bilobed-tippedappendage on back wall and a pair of calli near base of disk.Column ca. 2 mm; rostellum ovate-triangular, ca. 0.4 mm; stipeca. 1.2 mm, narrow; viscidium ca. 0.5 mm, subelliptic, one endbroadly emarginate. Fl. Apr. 2n = 38.Epiphytic on tree trunks in forests. S and W Hainan [Bhutan, India(including Andaman Islands), Indonesia, Laos, Malaysia, Myanmar,Philippines, Sri Lanka, Thailand, Vietnam].2. Pomatocalpa undulatum (Lindley) J. J. Smith subsp. acuminatum(Rolfe) S. Watthana & S. W. Chung, Harvard Pap.Bot. 11: 249. 2007.台 湾 鹿 角 兰 tai wan lu jiao lanCleisostoma acuminatum Rolfe, Bull. Misc. Inform. Kew1913: 144. 1913; C. brachybotryum Hayata; Pomatocalpaacuminatum (Rolfe) Schlechter; P. brachybotryum (Hayata)Schlechter.Stems 2–3 cm, 3–7-leaved. Leaf blade linear-lorate, 11–21× 1.3–2.4 cm, leathery, conduplicate toward base, unequallybilobed. Inflorescences lateral, condensed-racemose, globose inoutline, 1.3–4 cm, densely many flowered; floral bracts broadlytriangular, 1.8–2.7 mm. Flowers ca. 8 mm in diam., fleshy, sepalsand petals brownish yellow, sepals with 2 reddish browntransverse bands, petals with reddish brown patches near base,lip lateral lobes yellow, mid-lobe white, spur yellow; pediceland ovary 4–8 mm. Sepals similar, suboblong, obtuse; dorsalsepal 3.7–4.5 × 1.5–2 mm; lateral sepals 3.5–4.2 × 2.1–2.4 mm.Petals incurved, falcate-oblong, 3.2–3.9 × ca. 1.3 mm, basecontracted, apex obtuse; lip spurred at base, 3-lobed; laterallobes erect, deltoid, 1.2–1.3 × 0.4–0.5 mm; mid-lobe broadlytriangular or suborbicular, 2.2–3 × 2.2–3.3 mm, base with 2keels, apex subacute; spur saccate, dorsiventrally compressed,3.3–4 × 2–3 mm, inside with an appendage on back wallcovering its entrance. Column 0.9–1.2 mm; anther cap beakedat apex. Fl. Mar–Apr.● Epiphytic on tree trunks in forests; ca. 800 m. S Taiwan.Pomatocalpa undulatum subsp. undulatum, from Bangladesh andNE India, is distinguished by the floral bracts, which are 0.4–0.5 mm,and the relatively small flowers with dorsal sepal ca. 3.5 mm and spur1.8–2.3 mm.161. PELATANTHERIA Ridley, J. Linn. Soc., Bot. 32: 371. 1896.钻 柱 兰 属 zuan zhu lan shuChen Xinqi ( 陈 心 启 Chen Sing-chi); Jeffrey J. WoodHerbs, epiphytic or lithophytic, monopodial. Stems rather long climbing, rooting from nodes, usually slightly compressedtrigonous, many noded, rigid, enclosed in persistent leaf sheaths, sometimes branched. Leaves many, usually densely distichous, flat,rarely subcylindric, leathery or slightly fleshy, base sheathing, jointed, apex bilobulate, rarely obtuse. Inflorescence racemose,axillary, usually very short, few flowered. Flowers small or medium-sized, fleshy. Sepals free, similar. Petals smaller; lip spurred atbase, 3-lobed; lateral lobes erect, small; mid-lobe large, adaxially thickened and cushionlike centrally; spur narrowly conic, with alongitudinal septum or ridge on inner surface, and with a tough appendage on back wall. Column stout, apex with 2 long andincurved stelidia; rostellum small, short; pollinia 4 in 2 pairs, waxy, subglobose; stipe irregular, much broader than long; viscidium ±crescent-shaped.About five species: tropical Himalayas south to Sumatra, north to Korea and Japan; four species in China.Reviewer L. Averyanov notes that Pelatantheria insectifera (H. G. Reichenbach) Ridley (J. Linn. Soc., Bot. 32: 373. 1896; Sarcanthus insectiferH. G. Reichenbach, Bot. Zeitung (Berlin) 15: 159. 1857) should occur in S China. However, the present authors could not substantiate this assertionbecause they found no relevant specimens.1a. Leaves 0.5–0.8 × ca. 0.15 cm, subcylindric, obtuse .......................................................................................... 1. P. scolopendrifolia1b. Leaves much broader, flat, bilobed.2a. Mid-lobe of lip pink, apex obtuse ................................................................................................................................ 2. P. rivesii2b. Mid-lobe of lip waxy yellow, apex shortly cuspidate.3a. Apical tail of mid-lobe 2- or 3-lobed, margin not fimbriate ........................................................................ 3. P. bicuspidata3b. Apical tail of mid-lobe entire, margin irregularly fimbriate ........................................................................ 4. P. ctenoglossa1. Pelatantheria scolopendrifolia (Makino) Averyanov, Bot.Zhurn. (Moscow & Leningrad) 73: 432. 1988.蜈 蚣 兰 wu gong lanSarcanthus scolopendrifolius Makino, Ill. Fl. Japan 1(7): t.40. 1891; Cleisostoma scolopendrifolium (Makino) Garay.Plants creeping. Stems slender, ca. 1.5 mm in diam., manynoded, branched. Leaves distichous, rather close; blade ± conduplicate,subcylindric, 5–8 × ca. 1.5 mm, leathery, apex ob-