Woodsia 



POLYPODIACEAE 



43 



Blades of fronds simple, long-attenuate at the apex, cordate at the base, en- 

 tire or undulate 9. Camptosorus, p. 53. 



Blades once to several times divided. 



Sori straight or slightly curved; fronds mostly 10-40 cm long 



10. Asplenium, p. 53. 



Sori often curved over the ends of the veins; fronds mostly 35-90 cm long. 

 8. Athyrium, p. 51. 



1. WOODSIA R. Br. Woodsia 



1. Woodsia obtusa (Spreng.) Torr. Common Woodsia. Map 9. Infre- 

 quent to rare in the southern part of the state and very local northward 

 to the counties shown on the map. Probably not found in Indiana north 

 of the counties shown on the map. It no doubt occurs also in Wabash 

 County but I have not been able to find it. It is usually found in shallow soil 

 on rocky slopes. It prefers sandstone but is also found on limestone. 



Cent. Maine to Wis., B. C, and Alaska, southw. to Ga., Ala., Tex. 

 and Ariz. 



2. CYSTOPTERIS Bernh. 



Fronds lanceolate, attenuate, often bulblet-bearing on the lower surface of the upper 

 part ; segments and teeth crowded ; rachis not winged ; pinnules mostly oblong, 



very obtuse; indusium truncate on the free side, minutely glandular 



1. C. btdbifera. 



Fronds ovate or oblong-lanceolate, acute, not bulblet-bearing; segments and teeth more 

 distant, decurrent on the slightly margined rachis; pinnules mostly oval, more 

 pointed ; indusium acute or acuminate, and often lacerate on the free side, not 

 glandular 2. C. fragilis. 



1. Cystopteris bulbifera (L.) Bernh. (Filix bulbifera (L.) Underw.) 

 Berry Bladder Fern. Map 10. Infrequent in the southern part of the state, 

 becoming very local to absent in the northern part. This species grows 

 only in wet places or places that are usually constantly kept moist in shady, 

 rocky ravines and in pockets or crevices of shaded cliffs. It is usually found 

 along the outlets of springs in southern Indiana. My Steuben County speci- 

 men was found in an old tamarack bog. 



Newf. to Man., southw. to Ga., Ala., Ark., and Iowa. 



"To 



Map 10 



Cystopteris bulbifera (L.) Bernh. 



Cystopteris fragilis (L.) Bernh. 



