-8 9 - 



Blechnum L. 



65. Blechnum serrulatum Richard. Rare; in moist 



shades. Southern Florida. 



Camptosorus Link. 



66. Camptosorus rhizophyllus (L.). Walking Fern; 



Walking-leaf. Not uncommon ; on calcareous 

 rocks. Maine and Quebec to Minnesota, Kansas 

 and the Gulf States. Has also "been found on 

 sandstone, shale, gneiss, quartzite and granite. 

 There is much diversity in the shape of the base 

 of the fronds, some fronds being rounded and 

 some eared. The form intermedius Arthur with 

 fronds tapering at base has been reported from 

 Iowa. 



Cheilanthes Sw. 



6 7 . Cheilanthes Alabamensis (Buckl. ) . Not uncommon ; 



on shaded rocks. Virginia to Florida, Illinois, 

 Arkansas and Arizona; also in Mexico. 



68. Cheilanthes argentea (Gmel.). Veryrare. Alaska; 



also in Siberia. 



69. Cheilanthes Californica (Nutt ). Lace Fern. Com- 



mon; at the base of shaded cliffs in moist soil 

 California. The form amoena A. A. Eaton with 

 acute tips to the pinnules is reported from 

 Fresno County. [C. amoena A. A. Eaton.) 



70. Cheilanthes Clevelandii D. C. Eaton. Tolerably 



common; at the base of cliffs. California. 

 71- Cheilanthes Cooperae D. C. Eaton. Rare: in 



crevices of rocks and in canyons. California. 

 72. Cheilanthes Eatoni Baker. Tolerably common: at 



the base of rooks in moist soil. Western Texas 



and Arizona. Closely related to C. tomentosa. 

 73- Cheilanthes Fendleri Hook. Rare; in crevices of 



the rocks. Colorado to Texas and California; 



also in Mexico. 



