: Initially, the hybrid was sterile, but through a rare natural process of chromosome doubling, it became a fertile, independent species.
: Its fronds are relatively small, typically ranging from 4 to 20 cm (about 1.5 to 8 inches) in length. bradley's spleenwort
Due to its very specific habitat requirements and rare occurrence, it is considered a species of special concern in many states. : Initially, the hybrid was sterile, but through