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黑眼花Thunbergia alata

时间:2013-07-15 16:36来源:未知 作者:徐晔春 点击:
黑眼花,Thunbergia alata,翼叶山牵牛








中文名(Chinese Name):黑眼花
学名(Scientific Name):Thunbergia alata Bojer ex Sims
英文名(English Common Name):blackeyed Susan vine
别名(Chinese Common Name):翼叶山牵牛
异名(Synonym):Endomelas alata (Bojer ex Sims) Raf.  Thunbergia cordifolia Nees
科属(Family & Genus):爵床科(Acanthaceae)山牵牛属
形态特征(Description):缠绕草本。茎具2槽,被倒向柔毛。叶柄具翼,长1.5-3厘米,被疏柔毛;叶片卵状箭头形或卵状稍戟形,长2-7.5厘米,宽2-6厘米,先端锐尖,基部箭形或稍戟形,边缘具2-3短齿或全缘,两面被稀疏柔毛间糙硬毛,背面稍密;脉掌状5出,主肋具1-2侧脉。花单生叶腋,花梗长2.5-3厘米,疏被倒向柔毛;小苞片卵形,长1.5-1.8厘米,宽1-1.4厘米,先端急尖或渐尖,钝,具5-7脉,外面被近贴服柔毛;萼成10不等大小齿;花冠管长2-4毫米,喉长10-15毫米,冠檐直径约40毫米,冠檐裂片倒卵形,冠檐黄色,喉蓝紫色;花丝无毛,长约4毫米;花药具短尖头,长3.5毫米和4毫米,药室基部和缝部具髯毛;花粉直径45微米;子房及花柱无毛;花柱长8毫米;柱头约在喉中部,不外露,裂片长1.5和2.5毫米长,1.2和2.0毫米宽,两个对折,上方的直立,下方的开展。蒴果带有种子的部分直径约10毫米,高约7毫米,喙长1 .4厘米,基部直径3毫米,整个果实被开展柔毛。
分布(Distribution):原产热带非洲,在热带亚热带地区栽培。
用途(Use):
引自中国植物志英文版FOC Vol. 19 Page 377, 378    
Thunbergia alata Bojer ex Sims, Bot. Mag. 52: t. 2591. 1825.
翼叶山牵牛 yi ye shan qian niu | Acanthaceae  | Thunbergia
Vines, herbaceous. Stems ± 4-angled to flattened, bisulcate, pubescent. Petiole 1.5-3 cm, winged, sparsely pubescent; leaf blade sagittate to deltoid ovate, 2-7.5 × 2-6 cm, abaxially hirsute, adaxially sparsely strigose, palmately 5-veined, base hastate to cordate, margin entire or undulate, apex acute. Flowers axillary, solitary; peduncle 2.5-3 cm, sparsely strigose; bracteoles ovate, 1.5-1.8 × 1-1.4 cm, abaxially hirsute, 5-7-veined, apex acute, acuminate, or obtuse. Calyx annular, unequally 10-13-lobed. Corolla orange with dark purple glandular "eye" in throat, 2.5-4.5 cm; tube basally cylindric for 2-4 mm, throat 1-1.5 cm; lobes obovate, apically truncate. Staminal filaments ca. 4 mm, glabrous; anther thecae 3.5-4 mm, unequal, pubescent at margin and base. Ovary glabrous; style ca. 8 mm, glabrous; stigma funnel-shaped, unequally 2-lobed, lower lobe spreading, upper lobe erect. Capsule pubescent, basal part ca. 7 × 10 mm, 2-seeded; beak ca. 1.4 cm, ca. 3 mm wide at base. Seeds reticulate on dorsal surface. Fl. Oct-Mar, fr. Feb-May. 2n = 18.
Cultivated in gardens and naturalized along roads. Guangdong, Yunnan [native to Africa].
Thunbergia alata is widely cultivated and naturalized in tropical regions.
(责任编辑:徐晔春)
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