1 | Sori marginal |
1' | Sori costal to medial |
2 | Rhizome 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 |
3 | Rhizome short-creeping, fronds close together, long, strap-shaped. |
3' | Rhizome long-creeping, fronds remote, narrowly ovate-lanceolate |