DICKSONIA Group

1Fertile leaflets distinctly narrower than sterile.
1'Fertile leaflets little different from sterile in size and shape.
2Fertile pinnules deeply lobed; massive tree-ferns
2'Fertile pinnules not lobed; stem short, creeping
3Pinnules deeply lobed almost at right angles to costa, not pinnate.
3'Pinnules pinnate, tertiary leaflets small, very oblique and lobed