FOC_25_Epidendroidea..

370
EPIDENDROIDEAE
25b. Flowers yellow or yellowish green; inflorescence axillary along leafy stem, emerging from
a 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. salaccense
26b. Lip distinctly or indistinctly 3-lobed; sepals and petals long acuminate.
27a. Flowers not opening widely; lip rhombic, mid-lobe ovate-triangular, margin
fimbriate, disk pubescent ............................................................................................... 2. D. furcatopedicellatum
27b. Flowers opening fully; lip not as above, disk glabrous.
28a. Lip mid-lobe ovate, long acuminate, margin undulate .................................................................... 3. D. somae
28b. Lip mid-lobe oblong, obtuse, margin not noticeably undulate .................................................. 4. D. luzonense
24b. Stems cylindric or compressed, sometimes upper part thickened and clavate, internodes swollen or not, with
longitudinal 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 current
year’s mature stem, nearly erect and parallel to stem, with many small flowers; sepals less than 2 mm
wide.
30a. Lip entire, elliptic .................................................................................................................. 66. D. porphyrochilum
30b. Lip 3-lobed.
31a. Inflorescence ca. as long as leaves; lip pale green, suborbicular .............................................. 69. D. compactum
31b. Inflorescence longer than leaves.
32a. Lateral lobes of lip entire or slightly inconspicuously toothed .................................... 70. D. sinominutiflorum
32b. Lateral lobes of lip with comblike teeth.
33a. Base of sepals and petals with purplish red venation, entire lip deep purplish
violet ............................................................................................................................. 67. D. strongylanthum
33b. Sepals and petals white or yellow, lateral lobes of lip purplish violet .................................. 68. D. monticola
29b. Plants tall, not grasslike; inflorescence exserted, but never erect and parallel to stem, with
a 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. chameleon
35b. Flowers pale to dark purple; stems unbranched ............................................................ 57. D. goldschmidtianum
34b. 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. moschatum
37b. Stems strongly compressed; leaf 6–8 cm; inflorescence 1-flowered; dorsal sepal
ca. 16 mm ............................................................................................................................... 43. D. menglaense
36b. 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, deeply
concave, subglobose, with orbicular sides embracing column, entire inner surface
finely ciliate, epichile triangular-acute, inner surface glabrous, ecallose ....................... 53. D. hercoglossum
39b. Stems ± of equal width, not swollen distally; column foot ca. 10 mm, much longer
than column proper; lip hypochile reduced to a neck, epichile cymbiform, finely
pubescent at apex and along median line, glabrous toward margin, with a large
glossy basal central callus ...................................................................................................... 54. D. aduncum
38b. 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. stuposum
40b. Flowers often not white; sepals more than 10 mm; lip entire or inconspicuously
3-lobed, adaxial surface usually papillose to pubescent, sometimes with a callus
near base but without any other ornaments; inflorescences 1–4-flowered.
41a. Sepals and petals pale yellow, creamy yellow, or golden yellow, never tinged with
purple or any other color except on lip ................................................................................................ Key 2
41b. Sepals and petals purplish red, white, or pale yellowish green, turning pale or creamy
yellow, apex often purplish red ............................................................................................................ Key 3
Key 2
1a. Upper part of stem often branched; leaves linear, less than 7 mm wide, retuse; petals clavate,
cordate-mucronate ...................................................................................................................................................... 40. D. hancockii
1b. Stem unbranched; leaves more than 1 cm wide, apex acute, not retuse or bilobed; petals not clavate.