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玫瑰石斛 Dendrobium crepidatum

时间:2013-10-23 18:48来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):玫瑰石斛 学名( Scientific Name ): Dendrobium crepidatum Lindl. Paxton 英文名( English Common Name ): 别名( Chinese Common Name ): 异名( Synonym ): Callista crepidata (Lindl. Paxton) Kuntze Callista law
中文名(Chinese Name):玫瑰石斛
学名(Scientific Name):Dendrobium crepidatum Lindl. & Paxton
英文名(English Common Name):
别名(Chinese Common Name):
异名(Synonym):Callista crepidata (Lindl. & Paxton) Kuntze  Callista lawiana (Lindl.) Kuntze  Dendrobium actinomorphum Blatt. & Hallb.  Dendrobium lawianum Lindl.  Dendrochilum roseum Dalzell
科属(Family & Genus):兰科(Orchidaceae)石斛属
形态特征(Description):茎悬垂,肉质状肥厚,青绿色,圆柱形,通常长30-40厘米,粗约1厘米,基部稍收狭,不分枝,具多节,节间长3-4厘米,被绿色和白色条纹的鞘,干后紫铜色。叶近革质,狭披针形,长5-10厘米,宽1-1.25厘米,先端渐尖,基部具抱茎的膜质鞘。总状花序很短,从落了叶的老茎上部发出,具1-4朵花;花序柄长约3毫米,基部被3-4枚干膜质的鞘;花苞片卵形,长约4毫米,先端锐尖;花梗和子房淡紫红色,长约3.5厘米;花质地厚,开展;萼片和花瓣白色,中上部淡紫色,干后蜡质状;中萼片近椭圆形,长2.1厘米,宽1厘米,先端钝,具5条脉;侧萼片卵状长圆形,与中萼片近等大,先端钝,基部歪斜,具5条脉,在背面其中肋多少龙骨状隆起;萼囊小,近球形,长约5毫米;花瓣宽倒卵形,长2.1厘米,宽1.2厘米,先端近圆形,具5条脉;唇瓣中部以上淡紫红色,中部以下金黄色,近圆形或宽倒卵形,长约等于宽,2厘米,中部以下两侧围抱蕊柱,上面密布短柔毛;蕊柱白色,前面具2条紫红色条纹,长约3毫米;药帽近圆锥形,顶端收狭而向前弯,前端边缘具细齿。花期3-4月。
分布(Distribution):产云南、贵州等地,生于海拔1000~1800米的山地疏林中树干上或山谷岩石上。东南亚也有。
用途(Use):
引自中国植物志英文版:FOC Vol. 25 Page 371, 380   
Dendrobium crepidatum Lindley & Paxton, Paxt. Fl. Gard. 1: 63. 1850.
玫瑰石斛 mei gui shi hu| Orchidaceae  | Dendrobium
Callista crepidata (Lindley & Paxton) Kuntze; C. lawiana (Lindley) Kuntze; Dendrobium lawianum Lindley.
Stems pendulous, green, cylindric, usually 30-40 cm, stout, ca. 1 cm in diam., fleshy, base slightly contracted, unbranched, with many nodes, internodes 3-4 cm, with green and white-striped sheaths, purplish bronze when dry. Leaves narrowly lanceolate, 5-10 × 1-1.25 cm, subleathery, base with clasping sheath, apex acuminate; leaf sheath membranous. Inflorescence arising from old stems after leaves have fallen, very short, 1-4-flowered; peduncle ca. 3 mm; basal sheaths 3 or 4, scarious; floral bracts ovate, ca. 4 mm, apex acute. Pedicel and ovary pale purplish red, ca. 3.5 cm. Flowers spreading, thick, sometimes cleistogamous; sepals and petals white, pale purple above middle, waxy when dry, lip pale purplish red above middle, golden yellow below middle, column white, front with 2 purplish red stripes. Dorsal sepal subelliptic, ca. 21 × 10 mm, 5-veined, obtuse; lateral sepals ovate-oblong, nearly as large as dorsal sepal, 5-veined, midvein on abaxial surface ± keeled, base oblique, apex obtuse; mentum subglobose, small, ca. 5 mm. Petals broadly obovate, ca. 21 × 12 mm, 5-veined, rounded; lip orbicular or broadly obovate, length subequal to width, ca. 2 cm, both sides embracing column below middle, adaxially densely pubescent. Column ca. 3 mm; anther cap subconic, front margin denticulate, apex narrowed and arching forward.
Epiphytic on tree trunks in open forests, lithophytic on rocks in mountain valleys; 1000-1800 m. SW Guizhou, S Yunnan [Bhutan, India, Laos, Myanmar, Nepal, Thailand, Vietnam].




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