I G2 FERNS : BEITISH AND FOREIGN. 



§ 1. Woodsia vera. Stipes teith a special aHicalation. 

 Mcmhrcme of indushim nearly obsolete, fringed vnth articulated 

 hairs, which involve the sporcmgia, 



1. "W. Ilvensis, B. Br.; Sook. Brit. Ferns, t. 8; Eng. Bot. 



t. 2616 ; Sowerhy's Ferns, t. 5 ; Lindl. and Moore's 

 Brit. Fei-ns, t. 47 A. Acrosticlium Hvense, Idnn. 

 Porypodium Ilvense, 8w. r Schh. Fil. t. 19. — Europe, 

 Britain. T. 



2. W. hyperborea, if. Br. in Trams. Idnn. 8oc. 11, t. 11 ; 



Hook. Gen. Fil. t. 119 ; Sook. Brit. Ferns, t. 7 ; 

 Sowerhy's Fiirns, t. 6. Polypodium hyperboreum, 

 S-w.; Eng.Bot. t. 2023; Sehk. Fil.t. 17 B.—:Slnmpe. 

 Britain. T. 



§ 2. Physernaiiimi. Stipes not articulated. Membrane of in- 

 dusium complete, at length somewhat sinuose-laciniated. 



3. W. polystichoidQS, Eaton; Sook. 2nd Gent Ferns, t. 2. 



/3 Veitchii, Sook. Ga/rd. Ferns, t. 32. Woodaia 

 Veitchii, Sance, MS 8. — Japan, Mancturia. 



4. W. obtTlsa, Sook.; Hook. Gard. Ferns, t. 43; Lowe's 



Ferns, 7, t. 29. Polypodium obtusum, Sio.; Sdil-. 

 FiL t. 21. Woodsia Perriniana, Sook. et G'rev. Ic. Fil. 

 t. 68. — ^North America. 



5. W. mollis, /. Sm. ; Lowe's Ferns, 7, t. 26. Physematinm 



moUe, Kunze, Anal. Fterid. t. 27. Woodsia Mexicana, 

 B. Br.— Mexico. H. 



§ 4. ArihroptercB. Fronds ahoays pinnate ; pin/nee entire 

 or subpiniiatifid, always articidated with the rachis. Soi'j 

 pimctifonn, ierminal. Indusium reniform, rarely obsolete or 

 wanting. 



78 AETHROPTERIS, J. 8m. 



Vernation nniserial, distant ; sarmentnm slender, scandent; 

 stipes pseudo-articulated; the node of ai-ticulation basal 

 or more or less elevated. Fronds pinnate, l-lf foot long 



