: Initially, the hybrid was sterile, but through a rare natural process of chromosome doubling, it became a fertile, independent species.
Bradley's spleenwort - Illinois Department of Natural Resources
: Major threats include habitat destruction from quarrying and mining, mechanical disturbance from rock climbing, and overshading caused by invasive vines or tree growth. bradley's spleenwort
Bradley's spleenwort is a tufted perennial fern that grows in tight clusters. To identify it, look for these specific features:
: The frond consists of 6 to 14 pairs of triangular, toothed leaflets. The lowest pair are often the largest, and they gradually decrease in size toward the tip. : Initially, the hybrid was sterile, but through
Due to its very specific habitat requirements and rare occurrence, it is considered a species of special concern in many states.
Bradley's spleenwort is highly specialized and is often referred to as an "Appalachian spleenwort". To identify it, look for these specific features:
This fern has a fascinating evolutionary history known as . It originated as a hybrid between the Mountain Spleenwort ( A. montanum ) and the Ebony Spleenwort ( A. platyneuron ).