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兜状青藤

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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： 产云南东南部.

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。

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。

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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.

兜状青藤生长习性

兜状青藤生长于海拔1100-1300米的山谷中。

兜状青藤分布范围

国内分布：兜状青藤产自于云南东南部。

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