KEY TO THE SPECIES

1Indusium scaly, attached at the narrow, cordate base only
1'Indusium attached at the base and only part of the sides or also attached along the sides and pouch-shaped, or only attached at broad base and hardly or not at sides, or very small and inconspicuous
2Leaves usually bipinnate. Indusium semicircular or oblong; scales basifixed with cordate base and greatly overlapping lobes, longest petiolules 1 mm long, longest pinnules or pinna lobes 15-32 by 3-10 mm, indusium longer than wide or about as wide as long
2'Leaves usually pinnate with strongly dissected pinnae. Indusium reniform, wider than long; scales peltate; longest petiolules 2-3 mm long; longest pinnules or pinna lobes 12-17 by 3-5 mm
3Indusium attached at the broad base and hardly or not at sides, semicircular, wider than long; scales with pale border from base to apex or this quickly diminishing or disappearing towards the apex, flat and nearly acicular
3'Indusium attached at the base and only part of the sides or also attached along the sides, pouch-shaped, or very small, inconspicuous, more or less triangular to rhomboid or oblong, longer than wide or about as wide as long; scales without pale bor-der, distinctly acicular
4Indusium very small, inconspicuous
4'Indusium conspicuous, attached at the base and only part of the sides or also attached along the sides, pouch-shaped
5Scales basifixed with cordate base and much overlapping lobes
5'Scales peltate
6Indusium longer than wide with free pointed upper half, at least as long as basal half
6'Indusium longer than wide or about as wide as long, without free pointed upper half