兜狀青藤

兜狀青藤

原圖鏈接 來自好看視頻

中文學名:狀青藤 拉丁學名:Illigera trifoliata sp. cucullata 界:植物界 門:被子植物門 綱:雙子葉植物綱 科:蓮葉桐科 屬:青藤屬 分布區域:國內分布： 產雲南東南部.

兜狀青藤(dōu zhuàng qīng téng，學名：Illigera trifoliata sp. cucullata）為蓮葉桐科青藤屬下的一個亞種。藤本。莖褐色具槽棱，光滑無毛。葉具3小葉; 葉柄圓柱形，小葉披針狀橢圓形或橢圓形至卵形，聚傘圓錐花序腋生，被黃褐色短柔毛。花紫綠色或綠色，果具2翅，翅近圓形，自於雲南東南部。

目錄

兜狀青藤形態特徵

藤本。莖褐色具槽棱，光滑無毛。葉具3小葉; 葉柄圓柱形，長6-8厘米，有條紋，無毛。

小葉披針狀橢圓形或橢圓形至卵形，兩面無毛，紙質至亞革質，長6-9厘米，寬3.5-6厘米，先端突然短漸尖，基部圓形，側脈3-4對，與中脈成45度的角；小葉柄長0.8-2厘米，無毛。

苞片長橢圓形，長約2.5毫米，被黃褐色短柔毛。聚傘圓錐花序腋生，被黃褐色短柔毛。花紫綠色或綠色，萼片5，長6-7毫米，外面被褐黃色極短之柔毛；

花瓣與萼片同形稍短，長5-6毫米；雄蕊與花瓣等長，附屬物長橢圓形，膜質，長達4毫米，具柄，背部張口狀，先端闊楔形；花柱長5-6毫米；子房下位，四棱形，密被黃褐色極短之柔毛。

原圖鏈接 來自好看視頻

果具2翅，翅近圓形，徑4-4.5厘米。花期8-3月。果期1-9月。 本亞種與原亞種的區別在於小葉側脈與中脈成45度的角，果翅近圓形，直徑4-4.5厘米 。

分類文獻

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.

兜狀青藤生長習性

兜狀青藤生長於海拔1100-1300米的山谷中。

兜狀青藤分布範圍

國內分布：兜狀青藤產自於雲南東南部。

國外分布：兜狀青藤分布於印度(安達曼群島),緬甸,泰國,越南,馬來西亞及印度尼西亞。