马关崖爬藤
马关崖爬藤 |
中文学名:马关崖爬藤 二名法:Tetrastigma venulosum C. Y. Wu 界:植物界 门:被子植物门(Angiospermae) 纲:木兰纲 亚 纲:蔷薇亚纲(Rosidae) 目:葡萄目 科:葡萄科(Vitaceae) 亚 属:崖爬藤亚属 种:马关崖爬藤 |
马关崖爬藤(mǎ guān yá pá téng,学名 Tetrastigma venulosum C. Y. Wu),木质藤本植物,小枝圆柱形,显著具纵棱纹,无毛。花期6月。产于云南海拔约1600米地区。 [1]
目录
马关崖爬藤形态特征
木质藤本。小枝圆柱形,细瘦,显著具纵棱 纹,无毛。
叶为3小叶,小叶卵状长椭圆形,最宽处在叶片下部,长14.5-15.5厘米,宽5.5-6厘米,顶端骤尾尖,基部圆形,上面绿色,下面浅绿色,两面均无毛;
侧脉9-10对,网脉上面突出,下面明显但不突出;叶柄长5.5-7厘米,中央小叶柄长约2.5厘米,侧生小叶柄长1-1.5厘米,无毛;托叶早落3厘米;
花序梗长1.7厘米,微被乳突状柔毛;花梗长1-1.5毫米,被乳突状柔毛;花蕾卵椭圆形,高2-2.5毫米;萼杯形,萼齿不整齐,外面被乳突状柔毛;
花瓣4,椭圆形,顶端有外展的小角状突起,无毛;雄蕊4,在雌花内花丝退化,残存小型不发育的花药;
花盘在雌花中发达,波状浅裂;子房与花盘合生,花柱短,柱头微4裂。花期6月。 [2]
Tetrastigma venulosum C. Y. Wu in Chin. J. Appl. Environ. Biol. 1 (4) : 320. 1995.
Lianas, woody. Branchlets terete, slender, with conspicuous longitudinal ridges, glabrous. Leaves 3-foliolate; stipules caducous; petiole 5.5-7 cm; central petiolule ca. 2.5 cm, lateral petiolules 1-1.5 cm, glabrous; leaflets ovate-elliptic, 14.5-15.5 × 5.5-6 cm, glabrous, lateral veins 9 or 10 pairs, abaxially veinlets distinct but not raised, adaxially raised, base rounded, apex cuspidate. Compound dichasium, axillary, ca. 3 cm; peduncle ca. 1.7 cm, slightly papillose. Pedicel 1-1.5 mm, papillose. Buds ovoid-elliptic, 2-2.5 mm. Calyx cupular, papillose, teeth irregular. Petals elliptic, corniculate, glabrous. Filaments abortive and anther sterile in female flowers. Disk well developed in female flowers, undulately lobed. Lower part of ovary adnate to disk; style short; stigma 4-lobed. Fl. Jun.
● Forests; ca. 1600 m. Yunnan.
马关崖爬藤生长环境
生长于海拔约1600米的林中。