THE CLASSIFICATION OF PLANTS 



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basis of anatomical and developmental characters. Unfortunately they left 

 the other groups of the Pteridophyta out of consideration and the classifica- 

 tion of the phylum remained for some time in a rather confused state. 



Fig. 2063. — Frederick Orpen Bower. 



In 1927 Hirmer published the first volume of his " Handbuch der 

 Palaeobotanik", in which he considered only the fossil cryptogamic types. 

 Later, in an article in Verdoorn's "Manual of Pteridology " (1938), he gives 

 a more complete classification of the fossil types which conforms fairly 

 closely to that given, in the same work, by Christensen for the living Ferns 

 and by Walton and Alston for the Lycopods. 



I. Psilophytales 



V. Cladoxylales 



VI. Filicales 



a. Eusporangiatae 



1. Aneurophytineae 



2. Coenopteridineae 



(i) Zygopteroideae 

 (ii) Botryopteroideae 

 (iii) Anachoropteroideae 



3. Marattiineae 



(i) Pecopteroideae 

 (ii) Danaeoideae 



4. Ophioglossineae 



p. Protoleptosporangiatae 

 y, Leptosporangiatae 



1, Simpliceae 



2. Complicateae 



