146 



Genera 



Total 

 Species 



Europe 



Asia 



Africa 



Temperate 

 America 



Tropical 

 America 



Common to 



U. S. and 



Europe 



Fiiices. 

















Equisetum. 



6 



6 













Onoclea. 



I 



— 



— 



— 



I 



— 



— 



Ophioglossum. 



6 



2 



2 



— 



— 



2 



— 



OSMUNDA. 



17 



5 



I 



— 



4 



8 



— 



ACROSTICHUM. 



25 



5 



6 





3 



IO 



— 



Pteris. 



19 



1 







1 



15 



— 



Blechnum. 



2 



— 



I 



— 



— . 



I 



— 



Hemionitis. 



2 



— 



— 



— 



— 



2 



— 



LONCHIT1S. 



3 



— 



— 



— 



— 



3 



— 



ASPLENIUM. 



20 



9 



2 



— 



1 



10 



— 



POLYPODIUM. 



58 



15 



9 



— 



5 



29 



2 



Adianium. 



15 



1 



3 



I 



1 



9 







Trichomanes. 



11 



2 



3 



2 



— 



6 







Marsilea. 



2 



2 













PlLULARIA. 



1 



1 













Isoetes. 



1 



1 



— 







— 



— 



— 



Musci. 

















Lycopodh M. 



24 



9 



7 





6 



4 



I 



Total. 



2I 3 



59 



37 



6 



22 



9^ 



3 



While the above will show that the genera outlined by Lin- 

 naeus are commonly recognized genera of to-day, the sense in 

 which he conceived them was far different from our present con- 

 ception except in the case of the genera Equisetum, Onoclea, 

 Blechnum, and Adiantum, which were composed wholly of species 

 still within those genera as now accepted. Opliioglossum, based 

 on the familiar adder-tongue fern of Europe, which had been 

 known as Opliioglossum vulgatum at least since the publication 

 of Bauhin's Pinax (1671), also included the tropical Cheiroglossa 

 and two Asiatic species of climbing ferns (Lygodium). Osmunda 

 was still more of a mixture and included nearly everything known 

 to Linnaeus which had a semblance of a panicle, although the 

 royal flowering fern common in Europe was clearly the historic 

 type of the genus. The genus Osmunda of Linnaeus contained 

 what are now distributed amoung four families representing two 

 distinct orders of plants, viz. : HclmintJiostachys and two species 

 of Botrychium (Ophioglossaceae) ; four species of Ornithopteris 

 and Anemia (Schizaeaceae) ; four species of Osmunda proper 

 (Osmundaceae), one species each in Matteuccia, Strutluoptcris, 

 Olfcrsia, and Cryptogramma (Polypodiaceae) besides one tropi- 

 cal American species not yet identified. 



