1 | Veins anastomosing (sect. Stegnogramma) |
1' | Veins free (sect. Leptogramma). |
2 | Pinnae to 7.5x1.6 cm or larger; lower surface of costae bearing many hairs, short ones more abundant than longer |
2' | Pinnae, if over 4 cm long, not more than 1 cm wide; lower surface of costae bearing rather sparse hairs 0.5 mm or more long and a few short ones. |
3 | Pinnae not over 1.5 cm long, only basal ones lobed; sporangia sparsely setose |
3' | Pinnae longer, several pairs lobed; sporangia all freely setose. |
4 | Pinnae to 5.0 x 0.8 cm with narrowly triangular apex 10 mm long |
4' | Pinnae proportionately wider with short entire apex. |
5 | Fronds to 30 cm long; basal pinnae lobed more than half-way towards costa. |
5' | Fronds c. 16 cm long; basal pinnae less deeply lobed |