28 



FERN FAMILY 



thus obliterating any pattern and hiding the powder; in- 

 dusium wanting. (Gymnopteris triangularis Underw. Ceropteris 

 triangularis Underw.) 



The Golden-back, immediately recognized by its yellow 

 powder (white when young), has been found growing in 

 damp rock crevices at the foot of the lower Yosemite Fall, 

 near the Snow Creek Trail, and in other damp or semi-damp 

 rocky places along the walls. In dry periods the fronds of 

 this fern roll up, thus protecting themselves until the drought 

 is over. A variety viscosa Eat., is recognized. Its pinnae are 

 more distant, less divided, the upper surface viscid, and the 

 powder creamy white. 



Adiantum pedatum 



