Bradley's spleenwort - Illinois Department of Natural Resources
: On the underside of mature fronds, you can find small, rusty-brown clusters called sori, which produce spores between June and December. Unique Hybrid Origins bradley's spleenwort
: It prefers very acidic, thin soil (pH 3.5–5.0) in exposed, often sunny rock fissures. Because it thrives in such hostile conditions where other plants cannot grow, it faces little competition from more aggressive species. Conservation Status you can find small
: Initially, the hybrid was sterile, but through a rare natural process of chromosome doubling, it became a fertile, independent species. rusty-brown clusters called sori
Due to its very specific habitat requirements and rare occurrence, it is considered a species of special concern in many states.