FOC_25_Epidendroidea..

EPIDENDROIDEAE
One highly variable species: from Nepal, NE and S India, and Bhutan, through S China, to SE Asia and S Japan, introduced and naturalized in
the Pacific islands and the Neotropics.
1. Arundina graminifolia (D. Don) Hochreutiner, Bull. New
York Bot. Gard. 6: 270. 1910.
竹叶兰 zhu ye lan
Bletia graminifolia D. Don, Prodr. Fl. Nepal. 29. 1825;
Arundina bambusifolia Lindley; A. chinensis Blume; A. chinensis
var. major S. Y. Hu; A. graminifolia var. chinensis
(Blume) S. S. Ying; A. stenopetala Gagnepain.
Plants 40–100(–150) cm tall. Stem rigid, enclosed by leaf
sheaths. Leaves numerous, 8–20 × 1–2 cm, leathery or papery,
apex acuminate; sheaths 2–4 cm. Inflorescence 2–20 cm, racemose
or 1- or 2-branched at base and paniculate, 2–10-flowered,
flowers opening in succession; floral bracts broadly ovatetriangular,
3–5 mm, sheathing at base. Flowers white or pink,
sometimes slightly tinged with purple; pedicel and ovary 1.5–3
cm. Sepals narrowly elliptic to narrowly elliptic-lanceolate, 25–
315
40 × 7–9 mm. Petals ovate-elliptic, 25–40 × 13–15 mm; lip 25–
40 × 12–24 mm, apical margin undulate; lateral lobes incurved,
embracing column, rounded; mid-lobe subsquare, 8–16 × 10–
16 mm, apex shallowly divided; disk with 3 (rarely 5) lamellae.
Column slightly arcuate, 20–25 mm. Capsule 28–35 × 8–15
mm. Fl. and fr. Jun–Nov, sometimes Jan–Apr. 2n = 32, 38, 40,
42.
Grassy slopes, streamsides, thickets, forests; 400–2800 m. N Fujian,
Guangdong, Guangxi, Guizhou, Hainan, S Hunan, Jiangxi, S Sichuan,
Taiwan, SE Xizang, W to SE Yunnan, Zhejiang [Bhutan, Cambodia,
India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Sri Lanka,
Thailand, Vietnam].
Reviewer L. Averyanov notes that Arundina caespitosa Averyanov
(Taiwania 52: 289. 2007), described from Vietnam, is a distinct
species and occurs in S China. However, the present authors prefer to
treat all Chinese Arundina under a broad delimitation of A. graminifolia.
108. THUNIA H. G. Reichenbach, Bot. Zeitung (Berlin) 10: 764. 1852.
笋兰属 sun lan shu
Chen Xinqi (陈心启 Chen Sing-chi); Jeffrey J. Wood
Herbs, terrestrial or epiphytic, usually rather large and tall, lacking pseudobulbs. Rhizome short, thick. Stems fasciculate, erect,
biennial, simple, sheathed below and leafy above. Leaves distichous, sessile below, often thinly textured. Inflorescence terminal,
borne on young leafy shoots, racemose, arching or pendulous, several flowered; floral bracts persistent, spathelike, large. Flowers
short-lived, large, showy. Sepals and petals subsimilar, free. Petals often slightly narrower and smaller than sepals; lip entire,
embracing column, spurred, fringed on front margin; disk with 5–7 lamellae or fringes; spur short, obtuse. Column slender, subterete
at apex, 2-winged, footless; rostellum ± 3-lobed; stigma concave; anther cap terminal, incumbent; pollinia 4, 2-lobed, without a conspicuous
caudicle, commonly attached to sticky substance.
About six species: SE Asia and Bhutan, China, India, and Nepal; one species in China.
1. Thunia alba (Lindley) H. G. Reichenbach, Bot. Zeitung
(Berlin) 10: 764. 1852.
笋兰 sun lan
Phaius albus Lindley in Wallich, Pl. Asiat. Rar. 2: 85.
1831; P. marshallianus (H. G. Reichenbach) N. E. Brown;
Thunia marshalliana H. G. Reichenbach.
Plants, terrestrial or epiphytic. Stem erect, terete, 30–100
cm tall, somewhat stout, usually with ca. 10 leaves, base with
several amplexicaul sheaths, completely enclosed in leaf
sheaths. Leaf blade narrowly elliptic or narrowly elliptic-lanceolate,
10–20 × 2.5–5 cm, papery or herbaceous, apex acuminate
or long acuminate, with amplexicaul sheaths at base,
articulate; sheaths persistent, tubular, 2–4 cm, becoming scarious.
Rachis 4–10 cm, 2–7-flowered; floral bracts persistent,
broadly elliptic to elliptic, cymbiform, large, 3–5 cm, papery.
Flowers large, white, lip yellow [or white] and with orange or
chestnut spots and stripes; pedicel and ovary 2.5–3 cm. Sepals
narrowly oblong, 4–5 × ca. 1.5 cm, apex acuminate. Petals
similar to sepals in size, slightly narrower; lip broadly ovate-oblong
or broadly oblong-pandurate, 4–5 × 2.5–3 cm, irregularly
fimbriate or erose, simple, apical margin crisped; disk with 5–9
shortly dentate-fimbriate ridges; spur cylindric, ca. 1 cm × 3–
3.5 mm, apex obtuse. Column ca. 2 cm. Capsule ellipsoid, ca. 4
× 2 cm. Fl. Jun. 2n = 36, 38, 40, 42, 44, 80.
Lithophytic on rocks or epiphytic on lower branches of trees in
forests or in shaded and rocky places; 1200–2300 m. SW Sichuan, SE
Xizang, S, SE, and W Yunnan [Bhutan, NE India, Indonesia, Malaysia,
Myanmar, Nepal, Thailand, Vietnam].
The Chinese material belongs to Thunia alba var. alba; T. alba
var. bracteata (Roxburgh) N. Pearce & P. J. Cribb, from Bhutan, NE India,
and Nepal, is distinguished by the lack of a yellow patch on the lip.
109. COELOGYNE Lindley, Coll. Bot. ad t. 33. 1821 [“Caelogyne”].
贝母兰属 bei mu lan shu
Chen Xinqi (陈心启 Chen Sing-chi); Dudley Clayton
Herbs, epiphytic. Rhizome creeping or ± pendulous, usually with rather dense nodes. Pseudobulbs distant or close, ovoid to
cylindric, usually covered with leathery sheaths, usually with 2 leaves at apex but sometimes with only 1 leaf. Leaf blade often ob-