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Polypodiiim Calif ornicum inhabits moss-covered rocks and I 

 have found it on a few oak trees (Quefcus virens). I have found 

 this species very widely distributed, having collected it in South- 

 ern California and up above here to about 9,000 feet elevation. 

 Climate does not seem to effect any change in its growth what- 

 ever. At times I have found it intertwined withAdiantum emar- 

 ginatum, Woodwardia radicans and Aspidium rigidum, 



Pellaea densa is quite rare. I have found it in but one place, 

 growing on the face of a moist cliff on lava soil, facing the south 

 at about 4,500 ft. elevation. It appears to grow through all seasons 

 of the year. Pellaea ornithopus is a very widely distributed fern. 

 I have collected it from Southern California to the summit above 

 here 9,000 feet elevation. I cannot see any climatic change in it. 

 In extreme dry weather it changes color turning to a pale green 

 and puts on the appearance of an old broom, while to the 

 slightest touch it will break and crumble as if dead; but just as 

 soon as a cool change comes it will immediately change color to 

 a luxurious green and show sign of life. 



Gymnogramme triangularis is a widely distributed species, 

 making its home under some overhanging rock or log, or at 

 times mingling with Cystopteris fragilis. The variations of 

 growth are remarkable. On the south slope of mountains most 

 of the fronds are very short, while the pinnae are all run to- 

 gether entirely changing the appearance and making the frond 

 nearly a solid cordate shape ; while on the north slope in sheltered 

 places the rhizome is larger and erect, and the fronds form a per- 

 fect triangle. This species is also very sensitive to heat, folding 

 and unfolding as the Cheilanthes does, and making new growth 

 in winter. 



Comaria spirant is very rare, being a native of Alpine streams. 

 I have not found it below 9,000 feet elevation. It is an evergreen 

 forming new growth in summer. 



Woodwardia radicans is very abundant along streams, often 

 attaining seven feet in height. Elevation seems to make no dif- 

 ference to it. I have collected it from 500 feet to 9,000 feet al- 

 titude. 



Grizzly Flats, California. 



