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串珠石斛 Dendrobium falconeri

时间:2013-10-23 18:57来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):串珠石斛 学名( Scientific Name ): Dendrobium falconeri Hook. 英文名( English Common Name ): 别名( Chinese Common Name ): 红鹏石斛、新竹石斛 异名( Synonym ): Dendrobium erythroglossum Hayata Callista fa
中文名(Chinese Name):串珠石斛
学名(Scientific Name):Dendrobium falconeri Hook.
英文名(English Common Name):
别名(Chinese Common Name):红鹏石斛、新竹石斛
异名(Synonym):Dendrobium erythroglossum Hayata  Callista falconeri (Hook.) Kuntze  Dendrobium falconeri var. albidulum (Rchb.f.) B.S.Williams  Dendrobium falconeri var. giganteum B.S.Williams  Dendrobium falconeri albidulum Rchb.f. 
科属(Family & Genus):兰科(Orchidaceae)石斛属
形态特征(Description):茎悬垂,肉质,细圆柱形,长30-40厘米或更长,粗2-3毫米,近中部或中部以上的节间常膨大,多分枝,在分枝的节上通常肿大而成念珠状,主茎节间较长,达3.5厘米,分枝节间长约1厘米,干后褐黄色,有时带污黑色。叶薄革质,常2-5枚,互生于分枝的上部,狭披针形,长5-7厘米,宽3-7毫米,先端钝或锐尖而稍钩转,基部具鞘;叶鞘纸质,通常水红色,筒状。总状花序侧生,常减退成单朵;花序柄纤细,长5-15毫米,基部具1-2枚膜质筒状鞘;花苞片白色,膜质,卵形,长3-4毫米;花梗绿色与浅黄绿色带紫红色斑点的子房纤细,长约1.5厘米;花大,开展,质地薄,很美丽;萼片淡紫色或水红色带深紫色先端;中萼片卵状披针形,长3-3.6厘米,宽7-8毫米,先端渐尖,基部稍收狭,具8-9条脉;侧萼片卵状披针形,与中萼片等大,先端渐尖,基部歪斜,具8-9条脉;萼囊近球形,长约6毫米;花瓣白色带紫色先端,卵状菱形,长2.9-3.3厘米,宽1.4-1.6厘米,先端近锐尖,基部楔形,具5-6条主脉和许多支脉;唇瓣白色带紫色先端,卵状菱形,与花瓣等长而宽得多,先端钝或稍锐尖,边缘具细锯齿,基部两侧黄色;唇盘具1个深紫色斑块,上面密布短毛;蕊柱长约2毫米;蕊柱足淡红色,长约6毫米;药帽乳白色,近圆锥形,长约2毫米,顶端宽钝而凹的,密布棘刺状毛,前端边缘撕裂状。花期5-6月。
分布(Distribution):产湖南、台湾、广西、云南,生于海拔800~1900米的山谷岩石上和山地密林中树干上。东南亚也有。
用途(Use):
引自中国植物志英文版:FOC Vol. 25 Page 371, 377   
Dendrobium falconeri Hooker, Bot. Mag. 82: ad t. 4944. 1856.
串珠石斛 chuan zhu shi hu| Orchidaceae  | Dendrobium
Callista falconeri (Hooker) Kuntze; Dendrobium erythroglossum Hayata.
Stems pendulous, cylindric, 30-40 cm or longer, slender, 2-3 mm in diam., fleshy, many branched, often swollen at branched nodes and moniliform, internodes often dilated above middle, to 3.5 cm on main stem, to 1 cm on branches, brownish yellow when dry, sometimes tinged with dirty black. Leaves often 2-5, alternate on upper part of branches, narrowly lanceolate, 5-7 × 0.3-0.7(or more) cm, leathery, base sheathing, apex obtuse or acute and slightly hooked; leaf sheath usually pale pink, tubular, papery. Inflorescences lateral, 1-flowered from each peduncle (occasionally a second peduncle arising creating a 2-flowered inflorescence); peduncle 5-15 mm, slender; basal sheaths 1 or 2, tubular, membranous; floral bracts white, ovate, 3-4 mm, membranous. Pedicel green; ovary yellowish green with purplish red spots, ca. 1.5 cm, slender. Flowers spreading, large, thinly textured; sepals pale purple or red with deep purple tip, petals white with purple apex, lip white with purple tip, yellow on both sides at base, disk with a deep purple blotch, column foot pale red, anther cap creamy white. Dorsal sepal ovate-lanceolate, 30-36 × 7-8(or more) mm, 8- or 9-veined, base slightly contracted, apex acuminate; lateral sepals ovate-lanceolate, ca. as large as dorsal sepal, 8- or 9-veined, base oblique, apex acuminate; mentum subglobose, ca. 6 mm. Petals ovate-rhombic, 29-33 × 14-16 mm, main veins 5 or 6, secondary veins many, base cuneate, apex subacute; lip ovate-rhombic, ca. as long as petals but much wider, adaxially densely barbellate, margin denticulate, apex obtuse or slightly acute. Column ca. 2 mm; foot ca. 6 mm; anther cap subconic, ca. 2 mm, densely bristly, front margin lacerate, apex broadly obtuse and concave.
Lithophytic on rocks in valleys or epiphytic on tree trunks in dense forests; 800-1900 m. E and N Guangxi (Lingchuan, Lingui), SE Hunan (Zixing), W Taiwan (Jiayi to Miaoli), SE to W Yunnan [Bhutan, NE India, Myanmar, N Thailand, Vietnam].
The Taiwanese form has consistently concolorous flowers with pink sepals and petals.


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