Danaea kalevala belongs to a complex of species that has traditionally been called D. nodosa.
It can easily be distinguished from that species by its enormous rhizomes that bear several rows of leaves.
It has many (13-16) pairs of lanceolate pinnae that are widest at the middle.
Danaea kalevala belongs to the ‘nodosa’-clade.
It is sister to a group uniting:
The genus Danaea is sister to all other Marattiaceae (http://tolweb.org/Marattiaceae/134249).
Learn about the form and structure of Danaea kalevala.