C. tomentosa, Link. •' Webby Lip-fern." N. E. Ariz. Doubt- 

 ful. (Largest of the genus.) 



^ ^ ^ Fronds tonientose and scaly beneath. 



C. Eatoni, leaker. '' Eaton's Lip-fern." Santa Catalina and 

 Chirricahua Mts. and Mt. Graham, Ariz. 



Var. amabilis, Lemmon. A lovely form with largt, nake<l 

 fruit. 



Chirricahua Mts. Sept. 1881. (New variety.) 



C. Lindheimeri, Hook. *' Lindheimer's Lip-fern." Sunny 

 slopes, Santa Catalina and Cliirricahua Mts,, and others, Ariz. 



* ^ j^ ^ P^ronds very scaly beneath ; no hairs. 



C. Fendleri, Hook. - Fendler's Lip-fern." Santa Catalina 

 and Chirricahua Mts. and Mt. Graham, Ariz., 8,000 ft, 



C. Parishii.* Davenport. 



" Parish's Lip-Fern." Mohave Desert, Cal. 1880. (Xew spe- 

 cies.) 



:»f ♦ * * * Scales conspicuously ciliated. 



C. myriophylla, Desv. '' Elegant Lip-fern." Webber Lake, 

 Mt. Lassen, and Mt. Standford, 8,500 ft. 



C. Cleveland!, Eaton. ^' Cleveland's Lip-fern." 187G (N. Sp. I) 

 San Diego Mts. 



§ 4. Akuj'iojyteris. Involucres various, i)owdered. 



C. argentea, Hook. •' Silvery Lip-fern." Alaska. Very rarely 

 collected. 



Pell^a, Link. Cliff-brakes. 



§ 1. Cheihplecton. Involucre becoming unfolded. 



P. Breweri, Eaton. " Brewer's Cliff-brake." Aft. Dana. 12,500 

 ft. Yo-Semite Peaks. Very Rare. 



§ 2. AUosorics. Involucre conspicuous remaining arched. 



* Pinnies not mucronate. 

 ^ Once ])innate. 



P. atropurpurea, Link. " Clayton's Cliff-brake." Sand-wash 

 of creek, Mt. Graham. N. slopes, Santa Catalina and Chirricahua 

 Mts., S. E. Ariz. 



P. aspera, Baker. "Stiff Clift'-brake." liare in N. Mex. 

 Perhaps in Ariz. 



^ ^ 3-1 pinnate. 



