织梦CMS - 轻松建站从此开始!

花卉图片网

当前位置: 主页 > 草本花卉 >

黑心菊Rudbeckia hirta

时间:2013-07-23 13:24来源:未知 作者:徐晔春 点击:
中文名 ( Chinese Name ): 黑心菊 学名 ( Scientific Name ): Rudbeckia hirta L. 英文名 ( English Common Name ): blackeyed Susan 别名 ( Chinese Common Name ): 黑心金光菊 异名 ( Synonym ): Coreopsis hirta Raf. Helianthus hirtus (






中文名Chinese Name):黑心菊
学名Scientific Name):Rudbeckia hirta L.
英文名English Common Name):blackeyed Susan
别名Chinese Common Name):黑心金光菊
异名Synonym):Coreopsis hirta Raf.  Helianthus hirtus (L.) E.H.L.Krause
科属Family & Genus):菊科(Compositae)金光菊属
形态特征Description):一年或二年生草本,高30-100厘米。茎不分枝或上部分枝,全株被粗刺毛。下部叶长卵圆形,长圆形或匙形,顶端尖或渐尖,基部楔状下延,有三出脉,边缘有细锯齿,有具翅的柄,长8-12厘米;上部叶长圆披针形,顶端渐尖,边缘有细至粗疏锯齿或全缘,无柄或具短柄,长3-5厘米,宽1-1.5厘米,两面被白色密刺毛。头状花序径5-7厘米,有长花序梗。总苞片外层长圆形,长12-17毫米;内层较短,披针状线形,顶端钝,全部被白色刺毛。花托圆锥形;托片线形,对折呈龙骨瓣状,长约5毫米,边缘有纤毛。舌状花鲜黄色;舌片长圆形,通常10-14个,长20-40毫米,顶端有2-3个不整齐短齿。管状花暗褐色或暗紫色。瘦果四棱形,黑褐色,长几2毫米,无冠毛。
分布(Distribution):产北美,我国各地庭院有栽培。
用途(Use):我国客地庭园常见栽培、供观赏。
引自中国植物志英文版FOC Vol. 20-21 Page 873
Rudbeckia hirta Linnaeus, Sp. Pl. 2: 907. 1753.
黑心菊 hei xin ju
Annuals, biennials, or perennials. Stems hispid to hirsut | Asteraceae  | Rudbeckia e. Leaf blade elliptic, lanceolate, or ovate, hispid to hirsute, base attenuate to cuneate, margin entire or serrate, apex acute; basal leaves petiolate, blade 8-30 × 0.5-7 cm; cauline leaves petiolate or sessile, blade 3-20 × 0.4-4 cm. Capitula solitary or 2-5 in loose, corymbiform arrays; phyllaries to 3 cm; receptacle hemispheric to ovoid; paleae 4-6 mm, abaxially hirsute to hispid at apex, apex acute, often attenuate. Ray florets 8-16; corolla limb usually uniformly yellow to yellow-orange or with a basal maroon splotch, sometimes mostly maroon, elliptic to oblong or oblanceolate, 15-45 × 5-10 mm, abaxially hispid to hirsute. Disk 1.2-2.2 × 1-2 cm; disk florets numerous; corolla proximally yellowish green, distally brown-purple, 3-4.2 mm; style branches ca. 1.5 mm, apex subulate. Achenes 1.5-2.7 mm; pappus absent. Fl. Jun-Sep.
Widely cultivated and naturalized in China [native to North America].
Rudbeckia bicolor Nuttall is listed in some Chinese floras; it is now treated as a synonym of R. hirta var. pulcherrima Farwell. (责任编辑:徐晔春)
织梦二维码生成器
顶一下
(1)
100%
踩一下
(0)
0%
------分隔线----------------------------
发表评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
用户名: 验证码:点击我更换图片