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WOODSIA. 



Woodsia Perriniana, Hooker. 

 " incisa, Gillies. 



Sir W. J. Hooker, in his ^'Species Filicum," enumerates- 

 Woodsia mollis, J. Smith. Mexico. 



Guatemalensis, Hooker. Guatemala. 

 Peruviana, Hooker. Peru. 

 Cumingiana, Kunze. Chili. 

 Caucasica, ./. Smith, Caucasus, 

 elongata. Hooker. Northern India. 

 obtusa, Hooker. North America, 

 incisa. Gillies. Argentine Eepublic. 

 ilvensis, Broion. England, 

 hyperborea, Brown. England, 

 glabella, Broion. Subarctic America. 



Sori globose, and covered with a soft membranaceous indu- 

 sium, more or less globose, covering the entire sorus, and 

 eventually opening at the top. 



Fronds membranaceous, small, pinnate, bipinnate, or sub- 

 tripinnate. 



Rhizoma tufted. 



Veins simple, forked, or pinnate, from a central costa ; venules 

 free. 



