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EPIDENDROIDEAE<br />
About seven species: Himalayas, some species extending through Indochina and Malaysia to the Philippines; two species in China.<br />
53. Dendrobium hercoglossum H. G. Reichenbach, Gard.<br />
Chron., n.s., <strong>25</strong>: 487. 1886.<br />
重唇石斛 chong chun shi hu<br />
Callista annamensis Kraenzlin; C. hercoglossa (H. G.<br />
Reichenbach) Kuntze; C. vexans (Dammer) Kraenzlin; Dendrobium<br />
hercoglossum var. album S. J. Cheng & C. Z. Tang; D.<br />
poilanei Guillaumin; D. vexans Dammer; D. wangii C. L. Tso.<br />
Stems pendulous, pale yellow when dry, cylindric or<br />
sometimes thickened from base to upper part, usually 8–40 cm,<br />
2–5 mm in diam., with few to many nodes, internodes 1.5–2<br />
cm. Leaves narrowly oblong or oblong-lanceolate, 4–10 × 0.4–<br />
0.8(–1.4) cm, leathery, with tightly clasping sheaths at base,<br />
apex obtuse and unequally bilobed. Inflorescences often several,<br />
arising from old leafless stems, 2- or 3-flowered; peduncle<br />
green, 6–10 mm; rachis sometimes slightly upcurved, 1.5–2 cm,<br />
thin and weak, base with 3 or 4 short tubular sheaths; floral<br />
bracts ovate-lanceolate, small, 3–5 mm, dry membranous, apex<br />
acute. Pedicel and ovary pale pinkish red, 1.2–1.5 cm. Flowers<br />
spreading; sepals and petals pale pink, lip white, epichile pale<br />
pink, column white, anther cap purple. Dorsal sepal ovate-oblong,<br />
13–18 × 5–8(or more) mm, 7-veined, apex acute; lateral<br />
sepals slightly obliquely ovate-lanceolate, ca. as large as dorsal<br />
sepal, 7-veined, apex acuminate; mentum very short. Petals<br />
obovate-oblong, 12–15 × 4.5–7(or more) mm, 3-veined, apex<br />
acute; lip erect, ca. 1 cm, with epichile and hypochile; hypochile<br />
subglobose, inner surface densely barbellate, apex densely<br />
shortly fimbriate; epichile deltoid, relatively small, glabrous,<br />
apex acute. Column ca. 4 mm, lower part enlarged, foot ca. 2<br />
mm, column teeth deltoid, apex slightly obtuse; anther cap<br />
subspherical, densely finely papillate, front margin erose.<br />
Epiphytic on tree trunks in dense mountain forests, lithophytic<br />
on damp rocks in valleys; 600–1300 m. SW Anhui (Huo Shan), SW<br />
Guangdong (Xinyi), Guangxi, SW Guizhou, Hainan, Hunan (Jianghua),<br />
S Jiangxi, SE Yunnan [Laos, Malaysia, Thailand, Vietnam].<br />
389<br />
54. Dendrobium aduncum Wallich ex Lindley, Edwards’s Bot.<br />
Reg. 28(Misc.): 58. 1842.<br />
钩状石斛 gou zhuang shi hu<br />
Callista adunca (Wallich ex Lindley) Kuntze; Dendrobium<br />
aduncum var. faulhaberianum (Schlechter) Tang & F. T. Wang;<br />
D. faulhaberianum Schlechter.<br />
Stems pendulous, sometimes upper part ± curved, pale<br />
yellow when dry, cylindric, 50–100 cm, 2–5 mm in diam., unbranched,<br />
with many nodes, internodes 3–3.5 cm. Leaves oblong<br />
or narrowly elliptic, 7–10.5 × 1–3.5 cm, with clasping<br />
sheaths at base, apex acute. Inflorescences often several, arising<br />
from upper part of deciduous or leafy old stem; rachis ± porrect,<br />
1.5–4 cm, slender, sparsely 1–6-flowered; peduncle 5–10 mm,<br />
base with 3 or 4 membranous sheaths 2–3 mm; floral bracts<br />
ovate-lanceolate, 5–7 mm, membranous, acute. Pedicel and<br />
ovary ca. 1.5 cm. Flowers spreading; sepals and petals pale<br />
pink, lip white, callus green, column white, anther cap deep<br />
purple. Dorsal sepal oblong-lanceolate, 16–20 × ca. 7 mm, 5veined,<br />
apex acute; lateral sepals obliquely ovate-triangular, ca.<br />
as long as or slightly broader than dorsal sepal, 5-veined, apex<br />
acute; mentum jarlike, ca. 1 cm. Petals oblong, 14–18 × ca. 7<br />
mm, 5-veined, apex acute; lip concave, cymbiform, broadly<br />
ovate when spread, 15–17 mm, claw ca. 5 mm, adaxially<br />
densely white barbellate except for claw and both sides of disk,<br />
with a square callus near base, apex abruptly contracted, recurved-caudate.<br />
Column ca. 4 mm, lower part enlarged, apex<br />
with auriculate column teeth on both sides, front densely purple<br />
crinite, foot ca. 1 cm long and wide, bent forward, inner surface<br />
sometimes sparsely hairy; anther cap nearly subglobose,<br />
densely papillate-hairy, front margin irregularly dentate, apex<br />
slightly concave.<br />
Epiphytic on tree trunks in mountain forests; 700–1000 m. Guangdong,<br />
Guangxi, SW Guizhou, SE Hainan, NE Hunan (Taoyuan), SE<br />
Yunnan (Maguan) [Bhutan, NE India, Myanmar, Thailand, Vietnam].<br />
7. Dendrobium sect. Stuposa Kraenzlin in Engler, Pflanzenr. 45(IV. 50. II. B. 21): 55. 1910.<br />
叉唇组 cha chun zu<br />
Roots smooth. Stem ± pendulous, tall, slightly swollen, leafy, semideciduous. Inflorescences few, short, distal, borne on penultimate<br />
stems; rachis and peduncle thin and soft, few flowered. Flowers relatively small, white. Sepals less than 1 cm; mentum broadly<br />
conic, without a saccate cavity; lip apex 3-lobed, front margin with dense, long cottony hairs.<br />
About six species: Himalayas to Malesia; one species in China.<br />
55. Dendrobium stuposum Lindley, Edwards’s Bot. Reg.<br />
24(Misc.): 52. 1838.<br />
叉唇石斛 cha chun shi hu<br />
Callista flavidula (Ridley ex J. D. Hooker) Kuntze; C.<br />
stuposa (Lindley) Kuntze; Dendrobium exsculptum Teijsmann<br />
& Binnendijk; D. flavidulum Ridley ex J. D. Hooker; D.<br />
pristinum Ames; D. sphegidoglossum H. G. Reichenbach.<br />
Stems cylindric, 5–30 cm, 3–6 mm in diam., lower part<br />
narrowed, with 5–17 nodes, internodes 1.5–2.5 cm, with many<br />
longitudinal ridges. Leaves narrowly oblong-lanceolate, 4–7.5 ×<br />
0.4–1.5(or more) cm, leathery, base with clasping sheath, apex<br />
slightly obtuse and hooked on one side. Inflorescence apical on<br />
old leafless stem, 1–2.5 cm, 2- or 3-flowered; peduncle 10–15<br />
mm, ca. 1 mm in diam.; rachis thin and soft; basal sheaths 3 or<br />
4, broadly cupular; floral bracts oblong, 5–9 × 2.5–3(or more)<br />
mm, papery, obtuse. Pedicel and ovary 0.6–1.1 cm, slender.<br />
Flowers small, white. Dorsal sepal oblong, ca. 8 × 3 mm,<br />
5-veined, midvein prominent, apex subacute; lateral sepals<br />
obliquely ovate-lanceolate, larger than dorsal sepal, 5-veined,<br />
midvein abaxially winged especially below middle, apex sub-