KEY TO THE SPECIES OF ARTHROPTERIS

1Phyllopodia 8-60 mm long, pinnae with equal or somewhat unequal base, midrib straight towards the attachment, attachment usually more or less medial, pinnate crenate-serrate to more deeply incised
1'Phyllopodia to 5 mm long, pinnae with strongly asymmetric base, midrib curved towards the attachment at the basiscopic corner, pinnae entire to crenate-serrate