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晶帽石斛 Dendrobium crystallinum

时间:2013-10-23 18:49来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):晶帽石斛 学名( Scientific Name ): Dendrobium crystallinum Rchb. f. 英文名( English Common Name ): 别名( Chinese Common Name ): 异名( Synonym ): Callista crystallina (Rchb.f.) Kuntze Dendrobium crystall
中文名(Chinese Name):晶帽石斛
学名(Scientific Name):Dendrobium crystallinum Rchb. f.
英文名(English Common Name):
别名(Chinese Common Name):
异名(Synonym):Callista crystallina (Rchb.f.) Kuntze  Dendrobium crystallinum var. hainanense S.J.Cheng & C.Z.Tang
科属(Family & Genus):兰科(Orchidaceae)石斛属
形态特征(Description):茎直立或斜立,稍肉质,圆柱形,长60-70厘米,粗5-7毫米,不分枝,具多节,节间长3-4厘米。叶纸质,长圆状披针形,长9.5-17.5厘米,宽1.5-2.7厘米,先端长渐尖,基部具抱茎的鞘,具数条两面隆起的脉。总状花序数个,出自去年生落了叶的老茎上部,具1-2朵花;花序柄短,长6-8毫米,基部被3-4枚长3-5毫米的鞘;花苞片浅白色,膜质,长圆形,长1-1.5厘米,先端锐尖;花梗和子房长3-4厘米;花大,开展;萼片和花瓣乳白色,上部紫红色;中萼片狭长圆状披针形,长3.2厘米,宽7毫米,先端渐尖,具5条脉;侧萼片相似于中萼片,等大,先端渐尖,基部稍歪斜,具5条脉;萼囊小,长圆锥形,长4毫米,宽2毫米;花瓣长圆形,长3.2厘米,宽1.2厘米,先端急尖,边缘多少波状,具7条脉;唇瓣桔黄色,上部紫红色,近圆形,长2.5厘米,全缘,两面密被短绒毛;蕊柱长4毫米;药帽狭圆锥形,密布白色晶体状乳突,前端边缘具不整齐的齿。蒴果长圆柱形,长6厘米,粗1.7厘米。花期5-7月,果期7-8月。
分布(Distribution):产云南,生于海拔540~1700米的山地林缘或疏林中树干上,东南亚也有。
用途(Use):
引自中国植物志英文版:FOC Vol. 25 Page 372, 380   
Dendrobium crystallinum H. G. Reichenbach, Gard. Chron. 1868: 572. 1868.
晶帽石斛 jing mao shi hu| Orchidaceae  | Dendrobium
Callista crystallina (H. G. Reichenbach) Kuntze; Dendrobium crystallinum var. hainanense S. J. Cheng & C. Z. Tang.
Stems erect or ascending, cylindric, 60-70 cm, 5-7 mm in diam., slightly fleshy, unbranched, with many nodes, internodes 3-4 cm. Leaves oblong-lanceolate, 9.5-17.5 × 1.5-2.7 cm, leathery, with several dorsiventrally raised veins, base with clasping sheath, apex long acuminate. Inflorescences several, arising from apex of old deciduous stems, 1- or 2-flowered; peduncle short, 6-8 mm; basal sheaths 3 or 4, 3-5 mm; floral bracts pale white, oblong, 1-1.5 cm, membranous, apex acute. Pedicel and ovary 3-4 cm. Flowers spreading, large; sepals and petals creamy white, upper part purplish red, lip orange, upper part purplish red. Dorsal sepal narrowly oblong-lanceolate, ca. 3.2 × 0.7 cm, 5-veined, acuminate; lateral sepals similar in size, 5-veined, base slightly oblique, apex acuminate; mentum narrowly conic, ca. 4 × 2 mm. Petals oblong, ca. 32 × 12 mm, 7-veined, margin ± undulate, apex acute; lip suborbicular, ca. 25 mm, both surfaces densely pubescent, margin entire. Column ca. 4 mm; anther cap narrowly conic, densely white crystalline papillate, front margin irregularly dentate. Capsule elongate, cylindric, ca. 6 × 1.7 cm.
Epiphytic on tree trunks at forest margins or in open forests; 500-1700 m. Hainan, S Yunnan [Cambodia, Laos, Myanmar, Thailand, Vietnam].


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