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兜状青藤

中文学名:状青藤

拉丁学名:Illigera

trifoliata sp. cucullata

界:植物界

门:被子植物门

纲:双子叶植物纲

科:莲叶桐科

属:青藤属

分布区域:国内分布:

云南东南部.

兜状青藤(dōu zhuàng qīng téng,学名:Illigera trifoliata sp. cucullata)为莲叶桐科青藤属下的一个亚种。藤本。茎褐色具槽棱,光滑无毛。叶具3小叶; 叶柄圆柱形,小叶披针状椭圆形或椭圆形至卵形,聚伞圆锥花序腋生,被黄褐色短柔毛。花紫绿色或绿色,果具2翅,翅近圆形,自于云南东南部。 [1]

兜状青藤形态特征

藤本。茎褐色具槽棱,光滑无毛。叶具3小叶; 叶柄圆柱形,长6-8厘米,有条纹,无毛。

小叶披针状椭圆形或椭圆形至卵形,两面无毛,纸质至亚革质,长6-9厘米,宽3.5-6厘米,先端突然短渐尖,基部圆形,侧脉3-4对,与中脉成45度的角;小叶柄长0.8-2厘米,无毛。

苞片长椭圆形,长约2.5毫米,被黄褐色短柔毛。聚伞圆锥花序腋生,被黄褐色短柔毛。花紫绿色或绿色,萼片5,长6-7毫米,外面被褐黄色极短之柔毛;

花瓣与萼片同形稍短,长5-6毫米;雄蕊与花瓣等长,附属物长椭圆形,膜质,长达4毫米,具柄,背部张口状,先端阔楔形;花柱长5-6毫米;子房下位,四棱形,密被黄褐色极短之柔毛。

果具2翅,翅近圆形,径4-4.5厘米。花期8-3月。果期1-9月。 本亚种与原亚种的区别在于小叶侧脉与中脉成45度的角,果翅近圆形,直径4-4.5厘米 。

分类文献

Illigera trifoliata (Griff.) Dunn ssp. cucullata (Merr.) Kubitzki in Bot. Jahrb. 89, 169. 1969; et in Fl. Carob. Laos et Vietn. 12: 16. 1970.——I. cucuiiata Merr: in Un. Calif. Publ. Bot. 13: 132. 1926.

Lianas. Stem brown, angulate, glabrous. Leaves 3-foliolate; petiole terete, 6-8 cm, striate, glabrous; leaflets: petiolules 0.8-2 cm, glabrous; blade lanceolate-elliptic, elliptic, or ovate, 6-9 × 3.5-6 cm, papery to subleathery, both surfaces glabrous, lateral veins 3- or 4-paired, arising from midvein at ca. 45°, base rounded, apex abruptly shortly acuminate. Cymose panicles axillary, yellow-brown pubescent; bracteoles narrowly elliptic, ca. 2.5 mm, yellow-brown pubescent.

Flowers purple-green or green. Outer tepals 6-7 mm, abaxially yellow-brown pubescent. Inner tepals similar to outer ones but shorter, 5-6 mm. Stamens ca. as long as inner tepals; filaments straight in bud; appendages on ca. 1 mm stipe, narrowly ellipsoid, to 3 mm total, membranous, abaxially with open mouth, apex broadly cuneate.

Ovary tetragonous, densely yellow-brown pubescent. Interstaminal glands small. Fruit 2-winged; wings suborbicular or ligulate, 4-4.5 cm wide. Fl. Aug-Mar of following year, fr. Jan-Sep.

Valley forests; 1100-1300 m. SE Yunnan [Laos, Thailand, Vietnam].

Illigera trifoliata subsp. trifoliata is characterized by its leaflets, which are 5.5-15 × 3-9 cm, ± pubescent on both surfaces, with lateral veins arising from midvein at 60°-80°; also, its wings of fruit are ligulate, 2.5-4.5 cm wide.

It is distributed in India (Andaman Islands), Indonesia, Malaysia, Myanmar, and Thailand.Illigera trifoliata subsp. trifoliata is characterized by its leaflets, which are 5.5-15 × 3-9 cm, ± pubescent on both surfaces, with lateral veins arising from midvein at 60°-80°; also, its wings of fruit are ligulate, 2.5-4.5 cm wide. It is distributed in India (Andaman Islands), Indonesia, Malaysia, Myanmar, and Thailand.[2]

兜状青藤生长习性

兜状青藤生长于海拔1100-1300米的山谷中。[3]

兜状青藤分布范围

国内分布:兜状青藤产自于云南东南部。[4]

国外分布:兜状青藤分布于印度(安达曼群岛),缅甸,泰国,越南,马来西亚印度尼西亚

参考来源

  1. 兜状青藤, 植物智, 2020-01-18
  2. 带你认识不同种类的青藤 2019年10月9日 来源:秒懂百科-原来心叶青藤长这样 服务升级 7兜状青藤的百科知识 00:44 来源:秒懂百科-【秒懂百科】原来兜状青藤长这样 服务升级 8宽药青藤的百科...
  3. 兜状青藤长这样_好看视频 - 秒懂百科 视频时长 00:44 2019年8月30日 - “秒懂百科”原来兜状青藤长这样,本视频由秒懂百科原创提供,0次播放,有0人点赞,0人对此视频发表评论,好看视频是...
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