KEY TO THE SPECIES

1Sori marginal
1'Sori costal to medial
2Rhizome scales with a central band of dark, thick-walled cells, 1-1.5 mm wide.
2'Rhizome scales clathrate with thin-walled cells throughout, 2-4 mm wide
3Rhizome short-creeping, fronds close together, long, strap-shaped.
3'Rhizome long-creeping, fronds remote, narrowly ovate-lanceolate