KEY TO THE SPECIES

1One soral patch on each foliage frond, situated on a separate, stalked lobe, rhizome scales with a wide flabelloid margin
1'Soral patches 2-many on each foliage frond, situated on the lamina of the frond, rhizome scales without wide, flabelloid margin
2Foliage fronds long, pendulous, fertile lobe reniform, base fronds with upper part deeply lobed, veins immersed
2'Foliage fronds erect, fertile lobe obovate or elliptical, rarely lobed, base fronds with upper part entire or sinuose, veins prominent
3Soral patches many on each foliage frond, situated on the ultimate lobes
3'Soral patches 2 on each foliage frond, situated in the sinuses near the base of the frond, ultimate lobes sterile
4Upper part of base fronds entire, foliage fronds erect.
4'Upper part of base fronds lobed, foliage fronds pendulous.
5Foliage frond symmetrical, with two equal main lobes
5'Foliage fronds asymmetrical, with two unequal main lobes
6Both soral patches with well-developed, forked, lateral sterile lobes.
6'Lateral soral patch with very short, simple, lateral sterile lobes.