FOC_25_Epidendroidea..

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