全 文 ：Received： 2012–03–23　　　　Accepted： 2012–04–19
Supported by the National Natural Science Foundation of China (31100149) and Doctoral Fund for Scientific Research of South China Botanical
Garden, Chinese Academy of Sciences (201007)
* Corresponding author. E-mail: xinfw@scib.ac.cn
热带亚热带植物学报　2012， 20(5)： 520~522
Journal of Tropical and Subtropical Botany
Pteroceras Hassk. is widely distributed from
northwestern Himalaya to the Philippines and New
Guinea[1]. Among the 19 species currently recognized,
there were two species (one endemic) recorded
in China before, and both of them occurred in
Yunnan Province[2–3]. During our botanical survey in
Guangxi Province, several deposited specimens from
Nonggang National Nature Reserve were examined
thoroughly. Pteroceras simondianum (Gagnep.) Aver.,
a species previously known endemic to Vietnam,
was found to be new for Chinese orchid flora[4–6].
The discovery was the first demonstration of the
distribution of this genus in Guangxi.
Pteroceras simondianus (Gagnep.) Aver., Bot.
Zhurn. SSSR 73(3): 432. 1988. —— Ornithochilus
simondianus Gagnep., Bull. Mus. Natl. Hist. Nat.
Paris, Sér. 2, XXII: 632. 1950. Type: Vietnam: Nghe
An: Vinh, Rives sine no., colour plate No. 37 by
Simond (holotype P). (西蒙长足兰 Fig. 1)
Monopodial epiphytes with short stems and
closely placed leaves. Stems 4–6 cm long, 2.5–3 mm
in diam., unbranched. Leaves closely placed in two
rows, oblong-lanceolate, 12–18 cm × 2.5–3 cm,
strongly oblique and unequally bilobed, rounded to
obtuse at apex. Racemes 2– 4 cm long, 1.2–1.5 mm
in diam., 3–6-flowered; peduncle and rachis terete,
中国长足兰属(兰科)一新记录种
李琳1, 陈少伟2, 邢福武1*
(1. 中国科学院华南植物园，广州 510650； 2. 海南省昌江霸王岭国家级自然保护区， 海南 昌江 572723)
摘要： 报道了中国兰科植物一新记录种，即西蒙长足兰[Pteroceras simondianum (Gagnep.) Aver.]，并提供了描述和图片。本种形
态与长足兰[P. leopardinum (Par. & Rchb. f.) Seidenf. & Smitin.]相似，但叶明显较宽，偏斜；花淡黄色，略被绛紫色斑块或条纹；子
房光滑；花粉块为孔裂等，易于区别。
关键词： 长足兰属； 兰科； 新记录； 中国
doi: 10.3969/j.issn.1005–3395.2012.05.015
A Newly Recorded Species of Pteroceras (Orchidaceae) from China
LI Lin1, CHEN Shao-wei2, XING Fu-wu1*
(1. South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; 2. Hainan Bawangling Nature Reserve, Changjiang
572723, China)
Abstract: Pteroceras simondianum (Gagnep.) Aver., a newly recorded species from Guangxi, China is described
and illustrated. This species is similar to P. leopardinum (Par. & Rchb. f.) Seidenf. & Smitin., but differs by having
distinctly wider and oblique leaves; light yellow flowers with a few crimson-purple blotches and bars; glabrous
ovary; sub-spherical pollinia with a small, porous-like cleft.
Key words: Pteroceras; Orchidaceae; New record; China
第5期 521
Fig. 1 Pteroceras simondianum (Gagnep.) Aver.. A. Habitat; B. Blooming plant; C. Apex of leaf; D. Flower; E. Inflorescence; F. Column and lip (lateral
view); G. Column (front view); H. Lip (front view); I. Pollinia and anther cap. Bars: F,G,H = 2 mm; I = 0.5 mm.
李琳等：中国长足兰属(兰科)一新记录种
522　　　　　　　　　　　　　　　　　　　　 　 热带亚热带植物学报　　　　 　　　　　　　 　 第20卷
glabrous; floral bracts ovate-triangular, concave,
glabrous, apex obtuse. Pedicel and ovary terete,
glabrous, 8–10 mm long, 0.5–1.0 mm in diam. Flowers
slightly fleshy, resupinate; dorsal sepal ovate-
lanceolate, 9–10.5 mm × 4–5 mm, apex obtuse, slight
yellow, sometimes blotched or barred crimson-purple
on the adaxial side; lateral sepals adnate to the column
foot, obliquely ovate-lanceolate, 10–12 mm × 4.5–
5.5 mm, apex obtuse or acute, slight yellow, often
blotched or barred crimson-purple on the adaxial side;
Petals oblong-lanceolate, 8–9 mm × 2–3 mm, apex
obtuse; lip sessile, 3-lobed; 3–3.5 mm long, obtuse-
rounded; lateral lobes erect, obliquely flabellate-
oblong, slight yellow with dense crimson-purple
stripes on the adaxial side; mid-lobe fleshy, base with
a knob-like callus just above the spur entrance. Spur
short and sac-like, 2–2.5 mm long, inside glabrous,
apex rounded. Column subterete, 3.2–3.5 mm high,
slight yellow with streaked purple, column-foot 2.5–
3 mm long. Rostellum much shorter; pollinia 2, waxy,
subspherical, dorsally with a small, porous-like cleft,
attached by a linear-oblong stipe to a subcircularar
viscidium. Fl. Feb.–May.
Distribution: Vietnam. New record to China.
China: Guangxi, Nonggang National Nature
Reserve, epiphyte on tree trunks in open forests or
at forest margins in evergreen rain forest, alt. 183 m.
Latitude: 22°27′00.90 N, Longitude: 106°57′58.87 E.
2010– 04 –12, L.Li 147 (IBSC).
Conservation Status: This species is endemic
in this region and confined to a small forest patch as
we currently investigated. Therefore, we consider this
species to be vulnerable to extinction as ‘Critically
Endangered’(CR), according to IUCN red list categories
and criteria[7].
It’s related to P. leopardinum (Par. & Rchb. f.)
Seidenf. & Smitin.[3–4], a species from Yunnan, but the
latter differs in distinctly narrower leaves; densely
purplish-brown dotted flowers; 3-keeled ovary; sub-
spherical pollinia with deep longitudinal cleft.
References
[1]　 Seidenfaden G, Wood J J. The Orchids of Peninsular Malaysia
and Singapore [M]. Denmark: Fredensborg, Olsen & Olsen, 1992:
674–680.
[2]　 Pedersen H A E. Notes on the genus Pteroceras (Orchidaceae) [J].
Nord J Bot, 1992, 12(4): 387–388.
[3]　 Pedersen H A E. The genus Pteroceras (Orchidaceae): A
taxonomic revision [J]. Opera Bot, 1993, 117(1): 1–64.
[4]　 Chen S C, Wood J J. Flora of China Vol. 25 [M]. Beijing: Science
Press and St. Louis: Missouri Botanical Garden Press, 2009:
486–487.
[5]　 Seidenfaden G. The orchids of Indochina [J]. Opera Bot, 1992,
114(4): 429–431. Fig. 293.
[6]　 Comber J B. Orchids of Sumatra [M]. UK: Kew, Richmond,
Surrey, Royal Botanic Garden, 2001: 862–870.
[7]　 Baillie J E M, Hilton-Taylor C, Stuart S N. 2004 IUCN Red List
of Threatened Species™. A Global Species Assessment [M].
Gland, Switzerland and Cambridge, UK: IUCN, 2004: 1–191.