146 WOODSIA 



OBTUSE WOODSIA: Woddsia ohtusa. 



Fronds 8—20 inches long^ broadly lance-shaped, 

 minutely glandular-hairy, pinnate; pinnae rather 

 distant, pinnatifid or pinnate below, with oblong, 

 slightly-lobed pinnules. Both pinnae and pinnules 

 are quite blunt. In this respect it differs from 

 Cystopteris fragilis, with which it may be con- 

 fused. The stipes are about a third as long as the 

 blades, and bear scattered, brownish scales. 



Fruit dots round, borne on or below the minute 

 lobes; indusium fixed to the frond underneath the 

 sorus, early splitting into several segments, which 

 spread out in a ragged star shape. 



Found on rocky banks and cliffs from Nova 

 Scotia to Georgia and westward. 



NOTES. 



