Then, after more ersatz research, he taught that Lost Atlantis was part of Sweden. These beliefs made him somewhat famous, but only in Sweden--and that was only for a while.
The rudbeckia, or Black-eyed susan, is named for him. Linnaeus, the Father of Taxonomy, said to Prof. Rudbeck: "So long as the earth shall survive and as each spring shall see it covered with flowers, the Rudbeckia will preserve your glorious name."
Early in American history this flower was used as a diuretic. Native Americans made a tea from the roots to deal with the symptoms of a cold.
The petals made a fine dye.
There is also a black-eyed-Susan vine. The beautiful flower has five wide petals and a nearly black eye in the middle.