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大叶钩藤Uncaria macrophylla

时间:2013-11-08 12:56来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):大叶钩藤 学名( Scientific Name ): Uncaria macrophylla Wall. 英文名( English Common Name ): 别名( Chinese Common Name ): 异名( Synonym ): Nauclea silhetana D.Dietr. Uruparia macrophylla (Wall.) Kuntze U
中文名(Chinese Name):大叶钩藤
学名(Scientific Name):Uncaria macrophylla Wall.
英文名(English Common Name):
别名(Chinese Common Name):
异名(Synonym):Nauclea silhetana D.Dietr.  Uruparia macrophylla (Wall.) Kuntze  Uncaria sessilifolia Roxb. ex Kurz
科属(Family & Genus):茜草科(Rubiaceae)钩藤属
形态特征(Description):大藤本,嫩枝方柱形或略有棱角,疏被硬毛。叶对生,近革质,卵形或阔椭圆形,顶端短尖或渐尖,基部圆、近心形或心形,长10-16厘米,宽6-12厘米,上面仅脉上有黄褐色毛,下面被稀疏至稠密的黄褐色硬毛,脉上毛更密;叶脉上面微凹陷,下面凸起,侧脉6-9对,脉腋有窝陷;叶柄长3-10毫米,无毛或疏被短柔毛;托叶卵形,深2裂达全长1/2或2/3,裂片狭卵形,外面被短柔毛,内面无毛或疏被短柔毛,基部内面具粘液毛;头状花序单生叶腋,总花梗具一节,节上苞片长6毫米,或成简单聚伞状排列,总花梗腋生,长3-7厘米;头状花序不计花冠直径15-20毫米,花序轴有稠密的毛,无小苞片;花梗长2-5毫米;花萼管漏斗状,长2-3毫米,被淡黄褐色绢状短柔毛,萼裂片线状长圆形,长3-4毫米,被短柔毛;花冠管长9-10毫米,外面被苍白色短柔毛,花冠裂片长圆形,长2毫米,外面被短柔毛;花柱长约6毫米,伸出冠管外,柱头长圆形。果序直径8-10厘米;小蒴果长约20毫米,有苍白色短柔毛,宿存萼裂片线形,星状辐射,果柄长12-18毫米;种子长6-8毫米(连翅),两端有白色膜质的翅,仅一端的翅2深裂。花期夏季。
分布(Distribution):产云南、广西、广东、海南,生于次生林中,常攀援于林冠之上。印度、不丹、孟加拉国、缅甸、泰国、老挝、越南也有。
用途(Use):
引自中国植物志英文版: FOC Vol. 19 Page 349, 351 
Uncaria macrophylla Wallich in Roxburgh, Fl. Ind. 2: 132. 1824.
大叶钩藤 da ye gou teng| Rubiaceae  | Uncaria
Large lianas, height not noted. Young stems weakly to markedly quadrangular, pilosulous, tomentulose, or glabrescent. Petiole 3-25 mm, glabrous to densely tomentulose; leaf blade drying thinly leathery and yellowish brown adaxially, ovate or broadly elliptic, 10-16 × 6-12 cm, adaxially glabrous except strigillose along veins, abaxially sparsely to densely hirsutulous with pubescence denser along veins, base rounded, subcordate, or cordate, apex acute or shortly acuminate; secondary veins 6-9 pairs, usually with pubescent domatia; stipules caducous, ovate, 6-12 × 6-15 mm, 2-lobed for 1/2 or 2/3, lobes triangular to ovate. Inflorescences axillary, tomentulose to glabrescent; peduncle 3-7 cm; bracts triangular, 6-8 mm; flowering heads solitary, 15-20 mm in diam. across calyces, 40-50 mm in diam. across corollas; bracteoles absent; pedicels 2-5 mm. Flowers pedicellate. Calyx densely strigillose; hypanthium portion obconic, 2-2.5 mm; limb deeply lobed; lobes linear-oblong, 3-4 mm, obtuse to rounded. Corolla pale green to white, salverform, outside strigillose to tomentulose; tube 9-10 mm; lobes oblong to ligulate, ca. 2 mm, obtuse to rounded. Fruiting head 8-10 cm in diam.; pedicels 6-18 mm. Fruit pedicellate, fusiform, 14-20 × 4-5 mm, densely strigillose; seeds 6-8 mm. Fl. Jul, Sep, Dec, fr. Mar-Apr, Sep-Nov.
On canopy crowns in secondary forests; 300-900 m. Guangdong, Guangxi, Hainan, Yunnan [Bangladesh, Bhutan, India, Laos, Myanmar, N Thailand, Vietnam].
 


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