Blechnum

Blechnum is a genus of ferns, primarily found in tropical regions, especially in the Southern Hemisphere. These ferns, also known as chain ferns, are typically terrestrial or grow on rocks. Some species, like Blechnum, Doodia, and Woodwardia, are cultivated for ornamental purposes.1

The leaves of Blechnum ferns can vary significantly in form, from simple to complexly divided. In some species, the leaves are dimorphic, meaning they have distinct vegetative and fertile forms. Certain Blechnum species can develop short, sturdy stems and stiff leaves, giving them a resemblance to cycads. The reproductive structures, called sori, are usually found along the midrib of leaflets and are often covered by a protective flap called an indusium. The spores produced are typically bean-shaped.1