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兜狀青藤

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:

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。 [1]

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。

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.[2]

兜狀青藤生長習性

兜狀青藤生長於海拔1100-1300米的山谷中。[3]

兜狀青藤分布範圍

國內分布:兜狀青藤產自於雲南東南部。[4]

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

參考來源

  1. 兜狀青藤, 植物智, 2020-01-18
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