Cyathea
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Taxonomy
The division into two subsections is quite sharp, subsect. Fourniera being distinct in having a combination of the following characters: sori lacking indusia but covered with scales like other scales on lower surface of pinnules, and fronds fully tripinnate. Several exindusiate species of subsect. Sphaeropteris, however, have narrow scales spreading round the base of the receptacle of a sorus, so that the distinction on this character alone is not absolute.