Rudbeckia是一种园艺植物，具有大型黄色、橙色或红色花朵，中间有一个深色圆圈。Rudbecki

ia is a garden plant with large yellow, orange, or red flowers with a dark circle in the middle. There are many different types of rudbeckia, including black-eyed Susans. Rudbeckia is a plant genus in the Asteraceae or composite family. Top view, flat lay, macro shot. Rudbeckia flowers feature a prominent, raised central disc in black, brown shades of green, and in-between tones, giving rise to their familiar common names of coneflowers and black-eyed-susans. All are native to North America, and many species are cultivated in gardens for their showy yellow or gold flower heads that bloom in mid to late summer.