How to Grow Rudbeckia Commemorating Olaf Rudbeck (16601740) Swedish professor of botany and counselor of Linnaeus (Compositae). Cone flower. A genus of about 40 herbaceous plants, mostly perennial and hardy, natives of North America, related to Echinacea. The flowers are showy, daisy-like, often with drooping petals and conspicuous conical centers. Most of them are excellent herbaceous border plants and are […]