ORCHIDACEAE - China

314EPIDENDROIDEAE4–6 cm × 7–12 mm, base slightly dilated, covered with membranoustubular sheaths. Leaf blade elliptic, 20–36 × 5–12.5cm, papery, apex shortly acuminate; petiole 9–10 cm. Inflorescenceerect; peduncle to more than 1 m, glabrous, coveredwith 4 or 5 sheaths 3–5 cm; rachis to 21 cm, laxly 8–12-flowered;floral bracts narrowly lanceolate, 1.2–1.5 cm. Flowerswhite; pedicel and ovary 2–2.5 cm, slender. Dorsal sepal narrowlyoblong, 14–18 × ca. 3 mm, with inconspicuous veins,apex slightly obtuse; lateral sepals falcate-oblong, 14–18 × 3–4mm, with 3 inconspicuous veins, apex obtuse, base adnate toapex of column foot; mentum spurlike, ca. 4 mm. Petals similarto lateral sepals, 13–17 × ca. 2 mm; lip obovate-cuneate, ca. 1cm, 3-lobed; lateral lobes subovate, ca. 1 cm wide (flattened),apex obtuse; mid-lobe broadly obovate, 4–6 × 5–7 mm, concave,apex subtruncate; disk with 3 lamellae, median shorter.Column ca. 1 cm, winged, with conspicuous foot; wings with 1decurved toothlike arm on either side of middle part. Fl. Apr.Damp rocky places along valleys or in forests; ca. 1600 m. EGuangxi, SE Xizang [NE India, Vietnam].106. DIGLYPHOSA Blume, Bijdr. 336. 1825.密 花 兰 属 mi hua lan shuChen Xinqi ( 陈 心 启 Chen Sing-chi); Jeffrey J. Wood, Stephan W. GaleDiglyphis Blume.Herbs, terrestrial. Rhizome creeping, with long, fibrous roots. Pseudobulb persistent, narrowly conic or cylindric, with either asolitary terminal leaf at apex or an inflorescence at base. Leaf solitary, large, plicate, papery, contracted into a long petiole-like stalkat base. Inflorescence arising from base of pseudobulb, erect, terminal, racemose, occasionally branching in larger plants, glabrous,with several scattered tubular sheaths; rachis densely many flowered; floral bracts reflexed, narrow. Flowers medium-sized, resupinate.Sepals usually spreading; dorsal sepal longer than lateral sepals; lateral sepals adnate to column foot and forming a mentum.Petals similar to but slightly wider than lateral sepals; lip slightly fleshy, hinged to apex of column foot, entire to 3-lobed, reflexedabove middle, margin suberect below middle, without a spur; disk with 2 fleshy, converging lamellae or keels. Column erect, arcuate,slender, winged, with a simple column foot at base; anther terminal; anther cap cordate, apex conic-convex, 2-locular; rostellum shortand broad, not lobed; pollinia 2, waxy, nearly triangular, without caudicles.Two species: tropical parts of NE India and Vietnam, through SE Asia to New Guinea; one species in China.1. Diglyphosa latifolia Blume, Bijdr. 336. 1825.密 花 兰 mi hua lanChrysoglossum latifolium (Blume) Bentham & J. D.Hooker; C. macrophyllum King & Pantling; Diglyphis latifolia(Blume) Miquel; Diglyphosa macrophylla (King & Pantling)King & Pantling.Plants 25–40 cm tall. Rhizome fleshy. Pseudobulb cylindric,somewhat angular in cross section, 9–14 × 0.8–1 cm, withcaducous scales. Leaf blade broadly elliptic, plicate, 25–37 ×11–17 cm, veins prominent abaxially, margin undulate, apexacuminate or acute; petiole-like stalk 10–20 cm. Inflorescencedeep purple, 22–40 cm, with 3 or 4 scattered tubular sheaths;rachis 13–20 cm, densely many flowered; floral bracts reflexed,deep purple, narrowly ovate-lanceolate, 6–12 mm, apex acuminate.Flowers fleshy, mostly opening simultaneously, orangered,spotted with purple, omitting an unpleasant smell; pediceland ovary 10–14 mm, slender. Dorsal sepal narrowly oblongovate,10–13 × 2.5–3.5 mm, 3-veined, apex acuminate; lateralsepals oblong-ovate, falcate, 7–11 × ca. 3 mm, 3-veined, baseadnate to column foot and forming an inconspicuous mentum,apex acuminate. Petals similar to lateral sepals, 9–13 × 3–5mm, base adnate to column foot; lip mobile, oblong-obovate,ca. 5 × 3 mm, fleshy, slightly constricted near middle, concavebelow constriction and reflexed above, apex acute; disk with 2fleshy lamellae extending from base of lip almost to apex,converging into a single ridge toward base and apex. Columnca. 5 mm; column foot ca. 2 mm; rostellum subsquare, thick. Fl.Jun.Damp places in forests, along valleys; ca. 1200 m. SE Yunnan[NE India, Indonesia, Malaysia, New Guinea, Philippines].107. ARUNDINA Blume, Bijdr. 401. 1825.竹 叶 兰 属 zhu ye lan shuChen Xinqi ( 陈 心 启 Chen Sing-chi); Stephan W. GaleHerbs, terrestrial. Rhizome ovoid, stout; roots many, filiform, slender, fibrous. Stem erect, tufted at base, reedlike, unbranchedor occasionally branched when older, leafy. Leaves ± distichous, linear-lanceolate, conduplicate and sheathing at base, apex acute.Inflorescence terminal, unbranched or occasionally shortly branched, few to many flowered; floral bracts persistent, triangular, small.Flowers resupinate, opening one at a time, large; pedicel and ovary elongate, slender. Sepals similar, elliptic or lanceolate, apexacute; lateral sepals usually connivent below lip. Petals spreading, ovate-elliptic or obovate, apex acute; lip adnate to base of column,obovate, not spurred, 3-lobed; disk with 3 longitudinal pubescent lamellae; lateral lobes erect, embracing column, rounded; mid-lobespreading, apex divided. Column long, straight, dilated and narrowly winged toward apex; anther terminal, incumbent; pollinia 8, in2 groups, ± waxy, with short caudicles, attached to sticky viscidia; stigma transversely oblong, broad. Capsule cylindric-fusiform,large, ridged.