ORCHIDACEAE - China

370EPIDENDROIDEAE25b. Flowers yellow or yellowish green; inflorescence axillary along leafy stem, emerging froma protective sheath and piercing subtending sheath, appearing opposite next proximal leaf.26a. Lip entire, spatulate or narrowly lanceolate; sepals and petals obtuse to rounded ......................... 1. D. salaccense26b. Lip distinctly or indistinctly 3-lobed; sepals and petals long acuminate.27a. Flowers not opening widely; lip rhombic, mid-lobe ovate-triangular, marginfimbriate, disk pubescent ............................................................................................... 2. D. furcatopedicellatum27b. Flowers opening fully; lip not as above, disk glabrous.28a. Lip mid-lobe ovate, long acuminate, margin undulate .................................................................... 3. D. somae28b. Lip mid-lobe oblong, obtuse, margin not noticeably undulate .................................................. 4. D. luzonense24b. Stems cylindric or compressed, sometimes upper part thickened and clavate, internodes swollen or not, withlongitudinal stripes or ribs, sometimes entirely enclosed in leaf sheaths, fleshy; leaves grasslike or not.29a. Plants short, grasslike; inflorescences borne laterally from leaf axils, usually from distal nodes on currentyear’s mature stem, nearly erect and parallel to stem, with many small flowers; sepals less than 2 mmwide.30a. Lip entire, elliptic .................................................................................................................. 66. D. porphyrochilum30b. Lip 3-lobed.31a. Inflorescence ca. as long as leaves; lip pale green, suborbicular .............................................. 69. D. compactum31b. Inflorescence longer than leaves.32a. Lateral lobes of lip entire or slightly inconspicuously toothed .................................... 70. D. sinominutiflorum32b. Lateral lobes of lip with comblike teeth.33a. Base of sepals and petals with purplish red venation, entire lip deep purplishviolet ............................................................................................................................. 67. D. strongylanthum33b. Sepals and petals white or yellow, lateral lobes of lip purplish violet .................................. 68. D. monticola29b. Plants tall, not grasslike; inflorescence exserted, but never erect and parallel to stem, witha few to many medium-sized to large flowers; sepals more than 3 mm wide.34a. Mentum long, spurlike or tubular.35a. Flowers white with pale purple veins; stems often branched ..................................................... 56. D. chameleon35b. Flowers pale to dark purple; stems unbranched ............................................................ 57. D. goldschmidtianum34b. Mentum short and broadly blunt.36a. Lip saclike or slipperlike, margin strongly involute.37a. Stems cylindric; leaf 10–15 cm; inflorescence to 10-flowered; dorsal sepal 24–35 mm ...... 42. D. moschatum37b. Stems strongly compressed; leaf 6–8 cm; inflorescence 1-flowered; dorsal sepalca. 16 mm ............................................................................................................................... 43. D. menglaense36b. Lip not saclike or slipperlike, margin spreading to recurved.38a. Lip boat-shaped or subglobose, mid-lobe deflexed, acuminate.39a. Stems swelling toward apex from a narrow basal portion; column foot ca. 2.5 mm,much shorter than column proper; lip hypochile much larger than epichile, deeplyconcave, subglobose, with orbicular sides embracing column, entire inner surfacefinely ciliate, epichile triangular-acute, inner surface glabrous, ecallose ....................... 53. D. hercoglossum39b. Stems ± of equal width, not swollen distally; column foot ca. 10 mm, much longerthan column proper; lip hypochile reduced to a neck, epichile cymbiform, finelypubescent at apex and along median line, glabrous toward margin, with a largeglossy basal central callus ...................................................................................................... 54. D. aduncum38b. Lip not as above.40a. Flowers white, lip with a yellow patch; sepals ca. 8 mm; lip conspicuously 3-lobed,margin finely toothed above middle, front margin densely long ciliate-hairy;inflorescence 2-flowered ........................................................................................................ 55. D. stuposum40b. Flowers often not white; sepals more than 10 mm; lip entire or inconspicuously3-lobed, adaxial surface usually papillose to pubescent, sometimes with a callusnear base but without any other ornaments; inflorescences 1–4-flowered.41a. Sepals and petals pale yellow, creamy yellow, or golden yellow, never tinged withpurple or any other color except on lip ................................................................................................ Key 241b. Sepals and petals purplish red, white, or pale yellowish green, turning pale or creamyyellow, apex often purplish red ............................................................................................................ Key 3Key 21a. Upper part of stem often branched; leaves linear, less than 7 mm wide, retuse; petals clavate,cordate-mucronate ...................................................................................................................................................... 40. D. hancockii1b. Stem unbranched; leaves more than 1 cm wide, apex acute, not retuse or bilobed; petals not clavate.