310 GEOLOGICAL SURVEY OF NEW JERSEY. 



Tweedy. Mercer : Princeton Peters ; and common in rocky 

 places in the northern counties. A form with deeply lobed pin- 

 nules, approaching var. elegans, Robinson, was collected on Little 

 Snake Hill, by Leggett. 



A. acrostichoides (Michx.), Sw. 



In woods. Common in the northern and middle counties. 

 Frequent or occasional southward. 



Var. Schweinitzii (Beck), B. S. P. ( Var. incisum, Gray.) 



Bergen : Woolson ; Fort Lee Miss Knight. Essex r 

 Montclair Heights Britton. Morris : Millington and Morris- 

 town L. Schumacher; near Newfoundland Britton. War- 

 ren : Low's Hollow Porter. Mercer : Princeton Peters. 

 Burlington : Below Bordentown Stowell. 



CYSTOPTBRIS, Bernh. 



Bladder-fern. 

 O. bulbifera (L.), Bernh. 



On limestone rocks. Warren : Marble Hill Porter. Sus- 

 sex : Newton Miss S. D. Thompson ; Sussex Mills and near 

 Ogdensburg, and along Wawayanda Creek near the State line 

 Britton ; near Andover J. D. Reynolds. 



O. fragilis (L.), Bernh. 



In moist places. Monmouth : Freehold Willis. Mercer : 

 Princeton Peters ; Somerset Junction Stowell. Hudson : 

 Weehawken Ruger ; and fiequent in rocky places in the north- 

 ern counties. 



ONOCLBA, L. 



Sensitive Fern. 



O. sensibilis, L. 



In low grounds. Common throughout the State. 



O. Struthiopteris (L.), Hoffm. (Struthiopteris Germanica, Willd.) 



Sussex : Along the Delaware River below Dingrnan's Ferry r 

 and Warren : In a meadow along Van Campen's Creek Rusby 

 & Britton. Hunterdon : Rosemont and Bull's Island Best 

 Frenchtown Porter ; Lambertville Apgar. Burlington : 

 Crosswicks Creek, rare E. D. Sturtevant. 



