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等萼石豆兰 Bulbophyllum violaceolabellum

时间:2013-10-23 15:59来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):等萼石豆兰 学名( Scientific Name ): Bulbophyllum violaceolabellum Seidenf. 英文名( English Common Name ): 别名( Chinese Common Name ): 等萼卷瓣兰 异名( Synonym ): 科属( Family Genus ): 兰科(Orchida
中文名(Chinese Name):等萼石豆兰
学名(Scientific Name):Bulbophyllum violaceolabellum Seidenf.
英文名(English Common Name):
别名(Chinese Common Name):等萼卷瓣兰
异名(Synonym):
科属(Family & Genus):兰科(Orchidaceae)石豆兰属
形态特征(Description):根状茎粗壮,匍匐生根,粗4-6毫米。假鳞茎在根状茎上彼此距离4-9厘米,卵形,长1.5-3.4厘米,基部粗1-1.3厘米,顶生1枚叶,基部被叶鞘残留的纤维和长出多数稍分枝的根。叶片稍肉质或革质,长圆形至倒卵状长圆形,长10-20厘米,中部宽2.2-4.3厘米,先端钝,基部收窄为柄,在上面中肋凹陷;叶柄两侧对折,长1.5-2厘米。花葶直立,远高出叶外,长19-26厘米;总状花序缩短呈伞状,常具3-5朵花;花序柄粗2-3毫米,被3-4枚鞘;鞘膜质,筒状,紧抱花序柄,长8-13毫米;花苞片披针形,长5毫米,宽1.2毫米,先端渐尖,具3条脉;花梗和子房长约2.2毫米;花开展,萼片和花瓣黄色,具紫色斑点;中萼片宽卵形,长6-8毫米,宽6.2毫米,先端钝,边缘稍波状,具5条脉;侧萼片离生,卵状三角形,长8-9毫米,宽8毫米,先端短尖,基部贴生在蕊柱足上,全缘,具5条脉;花瓣卵状披针形,长4-5毫米,宽3毫米,先端具芒尖,全缘,具3条脉,仅中肋到达先端;唇瓣紫丁香色,肉质,舌形,强烈向下弯曲,长约5毫米,宽3毫米,先端截形,基部与蕊柱足末端连接而形成活动关节;蕊柱黄色,长约2毫米,基部粗3毫米,蕊柱翅向蕊柱足下延;蕊柱足紫色,长5.5毫米,其分离部分长2.5毫米;蕊柱齿长钻状,长2.5毫米。 花期4月。
分布(Distribution):产云南,于海拔约700米的石灰山疏林中树干上。老挝也有。
用途(Use):
引自中国植物志英文版:FOC Vol. 25 Page 422, 423   
Bulbophyllum violaceolabellum Seidenfaden, Nordic J. Bot. 1: 210. 1981.
等萼卷瓣兰 deng e juan ban lan| Orchidaceae  | Bulbophyllum
Rhizome stout, creeping, 4-6 mm in diam., rooting. Pseudobulbs 4-9 cm apart on rhizome, ovoid, 1.5-3.4 cm, 1-1.3 cm in diam., with a terminal leaf. Petiole conduplicate, 1.5-2 cm; leaf blade oblong to obovate-oblong, 10-20 × 2.2-4.3 cm, slightly fleshy or leathery, apex obtuse. Scape from base of pseudobulb, erect, 19-26 cm; raceme shortened, umbel-like, often 3-5-flowered; peduncle 2-3 mm in diam., with 3 or 4 tubular sheaths 8-13 mm; floral bracts lanceolate, ca. 5 mm, apex acuminate. Pedicel and ovary ca. 2.2 mm. Flowers widely opening, with yellow and purplish spotted sepals and petals and purple lip. Dorsal sepal broadly ovate, 6-8 × ca. 6.2 mm, margin slightly undulate, apex obtuse; lateral sepals ovate-triangular, 8-9 × ca. 8 mm, base adnate to column foot, apex mucronate. Petals ovate-lanceolate, 4-5 × ca. 3 mm, entire, aristate; lip strongly recurved, ligulate, ca. 5 × 3 mm, fleshy, base attached to end of column foot by a mobile joint, apex truncate. Column yellow, ca. 2 mm, base ca. 3 mm in diam., with wings decurrent to foot; foot purple, ca. 5.5 mm, with free part ca. 2.5 mm; stelidia subulate, ca. 2.5 mm. Fl. Apr.
Trees or rocks in open forests in limestone areas; ca. 700 m. S Yunnan [Laos].




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