Pteridophyten. 345 



4. G le icheniaceae. Represented by Dicranopteris (11 species), 

 distinct generically from the Australian Gleichenia. 



5. Cyatheaceae. Four genera : Cibotium, Cyathea, Hemitelia 

 and Alsophila. 



6. Poly p odiaceae. Comprised in 11 tribes, as follows: 



a) Alcicorneae, which it is proposed to separate from the 

 Acrosticheae. Two genera: Alcicornium (= Platycerium), 

 and Cheiropleura. 



b) Acrosticheae. Two genera: Elaphoglossum and Acro- 

 stichum. 



c) V itt arieae. Three genera: Antrophyum, Monogramma 

 and V Maria. 



d) Polypodieae. Comprises the genera: Selliguea, Drymo- 

 glossum, Belvisia (= Hymenolepis), Taenitis, Platytaenia, 

 Cyclophorus (= Niphobolus), Polypodium, Drynaria, Leca- 

 nopteris, Photinopteris, Dryostachyum, Goniophlebium and 

 Phymatodes. 



e) Pterideae. Comprises the genera: Adiantum, Pteridiiun, 

 Paesia, Pteris, Histiopteris, Doryopteris, Notholaena, Hypo- 

 lepis, Cheilanthes, Plagiogyria and Onychium. 



f) Aspienieae. Comprises the genera: Stenochlaena, Ste- 

 gania (= Lomaria of authors, in part), Woodwardia, Blech- 

 num, Hemionitis (reierred to this tribe with doubt), Conio- 

 gramme (associated with the Pterideae by Di eis), Syn- 

 grama (also placed in the Pterideae by D i el s), Asplenium, 

 Athyrium, Diplazium, Triphlebia, Thamnopteris, and Calli- 

 pteris (= Anisogoniiim). 



g) Dipterideae. A single species of the genus Dipteris. 



h) Dryopterideae. Comprises the genera: Phegopteris, 

 Didymochlaena, Dryopteris, Cyclosorus, Goniopteris, Meni- 

 scium, Arcyopteris (a new genus with Aspidium dif forme 

 Blume as the type; designed to replace Dicty opteris 

 Presl (1836) in part, the name D ict y opteris being invali- 

 dated by earlier use among the algae), Polystichum, Cyclo- 

 peltis, Pleocnemia, Sagenia, Cyrtomium, Tectaria, Egenolfia, 

 Polybotria, Stenosemia and Anapausia. 

 i) Oleandreae. Represented by the genus Oleandra. 



j) Wo o ds ieae. Represented by a Single species of Diacalpe. 



k) D av allie ae. Comprises the genera Lindsaca, Monacho- 

 sorum, Nephrolepis, Humata, Saccoloma, Davallia, Denn- 

 staedtia, Microlepia and Odontosoria. 



7. Hy menophyllaceae. Comprises the genera: Cephalomanes 

 (monotypic), Abrodictyum (monotypic), Trichomanes, Didynw- 

 glossum, Meringium, Hymenophyllum, and Sphaerocionium. 



IV. The order Salviniales comprises the families Salviniaceae 

 and Marsile aceae , represented by one species of Azolla and 

 of Marsilea respectively. 

 V. The order Equisetales, comprising the family Equisetaceae, 

 is represented by one species of Equisetum. 



VI. The order Lycopodiales comprises the three families Lycopo- 

 diaceae, P silota ceae and Sela gin ellaceae ; the first 

 represented by Lycopodium, the second by the genera Psilotum 

 and Tmesipteris, the third by numerous species of Selaginella. 



S u m m a r y. 



Orders Families Genera Species 



Ophioglossales 1 4 7 



Marattiales 1 3 7 



Eilicales 7 91 568 



Salviniales 2 2 2 



Equisetales 1 1 1 



Lycopodiales 3 4 48 



15 105 633 



William R. Maxon. 



