CHAPTER XX

=FILICALES.= Pp. 280–323.

I. =Leptosporangiate Filicales= 283–316 Eufilicineae 284–316. Osmundaceae 285, 286; Schizaeaceae 286–291; Matonineae 291–293; Loxsomaceae 293; Hymenophyllaceae 294; Cyatheaceae 294–296; Dennstaedtiinae 296; Polypodiaceae 296; Parkeriaceae 297; Dipteridinae 298. The habit, leaf-form, and distribution of ferns 300–309; The anatomy of ferns 309–316.

II. =Marattiales= 316–321

III. =Ophioglossales= 321–323

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