66. CRYPTOGRAMMA 



SLENDER CLIFF BRAKE: 



Crypto gramma Stelleri. 

 {Pellaea gracilis.) 



Fronds 3 to 6 inches in length, and quite dis- 

 similar; fertile fronds usually twice pinnate with 

 narrow pinnules, taller and more erect than the 

 sterile ones ; sterile fronds generally pinnate, with 

 pinnatifid pinnae, and broad, blunt segments, which 

 are more or less irregularly notched. 



Fruit dots borne close to the margin, covered 

 with a broad indusium, which usually extends en- 

 tirely around the pinnule. 



A delicate species, requiring shade and mois- 

 ture, found on limestone rocks from New Bruns- 

 wick and Quebec to Vermont, Connecticut, Penn- 

 sylv^ania, Illinois and Colorado. 



NOTES. 



