Aspleniaceae

Scales of the rhizome and axes clathrate. Indusia single, absent in Pleurosorus. Aspleniaceae

Indusia present. Lamina glabrous or scaly Asplenium

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Sori mostly marginal, 1 to each incurved lobule of a pinna, affixed to the central veinlet of the lobule but with a prominent indusium projecting towards the upper margin of the lobule, so as to make the sorus appear marginal

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Most of the sori remote from the margin of the lamina