1Rachises and lower surface of axes of frond lacking scales
1'Rachis, pinna-rachises and axes of pinnules scaly on lower surface.
2Scales on main rachis sparse; scales on pinna-rachis copiously ciliate.
2'Scales on main rachis abundant, with strongly thickened bases; scales on pinna-rachis not or little ciliate.
3Basal scales thin; scales on rest of stipe and rachis flat above the terete base.
3'Basal scales rigid with inflexed edges; scales on rest of stipe and rachis almost wholly terete