5O UNIVERSITY OF MISSOURI STUDIES [198 



evenly, but not abundantly distributed throughout in moist 

 rocky canons, 6000-8600 ft. (Daniels, 555). 



NOVA SCOTIA and MICHIGAN to ALASKA; NEW MEXICO and 

 COLORADO to CALIFORNIA. 



4. WOQDSIA R. Br. 



4. W. scopulina D. C. Eaton. CLIFF WOODSIA. 



The most abundant fern of the foot-hills and lower moun- 

 tainsides, occurring wherever rocks are exposed to the sur- 

 face, 5700-8100 ft. (Daniels, 156). 



MICHIGAN to BRITISH COLUMBIA; COLORADO and ARIZONA 

 to CALIFORNIA. 



5. W. Oregana D. C. Eaton. MOUNTAIN WOODSIA. 



With the preceding, but much scarcer, and ranging to the 

 timberlme or above, 5600-11000 ft. (Daniels, 361). Long's 

 Peak (Coulter in Wabash College Herb.). 



MICHIGAN to BRITISH COLUMBIA; COLORADO and ARIZONA 

 to CALIFORNIA. 



5. FILIX Adans. BLADDER-FERN. 



6. F. fragilis (L.) Underw. [Cystopteris fragilis Bernh.]. 



FRAGILE-FERN. 



Throughout on the moister rocks; apparently the only 

 fern of the plains region, 5100-13000 ft. (Daniels, 23). 

 Almost cosmopolitan. 



6. PTERIDIUM Scop. BRACKEN. 



7. P. aquilinum pubescens Underw. HAIRY BRAKE. 



Canons of Green Mt., and gulches at the foot of the Flat- 

 irons; Bear Canon; local, but abundant where found, 5800- 

 IOOOO ft. (Daniels, 277). 



MONTANA and COLORADO to ARIZONA and CALIFORNIA. 



7. CRYPTOGRAMMA R. Br. PARSLEY-FERN. 



8. C. aerostichoides R. Br. ROCK PARSLEY-FERN. 



High ridges of rock, descending on Green Mt. to about 

 6500 ft., thence to above HOOO ft. (Daniels, 271). 

 MICHIGAN to ALASKA; COLORADO to CALIFORNIA. 



