The lowest pinnae may be separated from the others along the rachis and form a clump around the crown, similar to the "wig" of Gymnosphaera baileyana.

This moss-like tuft of tiny, reduced leaves is distinctive for Gymnosphaera capensis, and can be used to identify this species across its range.

[5][6] The sori occur in two rows, one along each side of the pinnule midvein, and are covered by scale-like indusia.

The species is divided into two subspecies: Gymnosphaera capensis is cultivated as an ornamental plant.

[7] It is relatively easy to grow if provided with a semi-shady, moist and sheltered environment, and can likely tolerate several degrees of frost.