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）