POLYPODIACEAE. 3 



2. Woodsia oregana D. C. Eaton. On exposed rocks, northern Mich, to 

 B. C., Calif., Ariz, and Neb. Alt. 4000-11,500 ft. Hills about Box Canon, 

 west of Ouray; Red Mountain road, south of Ouray; Cheyenne Canon; 

 Horsetooth Mountain; North Cheyenne Canon; hills south of La Veta; Par- 

 lin, Gunnison Co.; Alpine Tunnel. 



3. Woodsia mexicana Fee. Foot-hills from Colo, and Ariz, to Mex. Alt. 

 7500-9500 ft. Manitou; South Cheyenne Canon; Colorado Springs; Chey- 

 enne Mountain; Ouray. 



6. FILIX Adans. BLADDER-FERN. 



Leaves ovate-lanceolate, 2-3-pinnate. i. F. fragilis. 



Leaves broadly triangular, 3-4-pinnate. 2. F. montana. 



1. Filix fragilis (L.) Underw. [Cystopteris fragilis Bernh.] On moist 

 rocks, Newf. and Labr. to Alaska, Calif., Ariz, and Ga. Alt. 5000-13,000 ft. 

 Horsetooth Mountain; Crystal Creek; near Ouray; Red Mountain, south of 

 Ouray ; Upper La Plata River ; near Pagosa Peak ; Cheyenne Canon ; Steam- 

 boat Springs; Minnehaha; Sierra Blanca; gulch west of Bear River; Par- 

 lin, Gunnison Co.; Lake City; Pike's Peak; Rist Canon; Horsetooth Gulch; 

 Michigan; Leroux Creek; Howe's Gulch; Silverton; Mount Garfield. 



2. Filix montana (Lam.) Underw. On rocks, Lab. and Que. to B. C. and 

 Colo. Alt. about 10,500 ft. Mt. Antero, Saguache Range. 



7. PTERIDIUM Scopoli. BRACKEN. 



i. Pteridium aquilinum pubescens Underw. [Pteris aquilina of western 

 botanists.] On poor soil in open places, Mont, to Calif., Colo, and Ariz. 

 Alt. 8500-10,000 ft. Red Mountain road, south of Ouray; near Pagosa Peak; 

 Bosworth's ranch; Rabbit-Ear Range. 



8. CRYPTOGRAMMA R. Br. PARSLEY-FERN. 



Leaves 3-4-pinnatifid, densely cespitose ; texture firm. i. C. acrostichoides. 



Leaves 2-3-pinnatifid, scattered; texture flaccid. 2. C. Stelleri. 



1. Cryptogramma acrostichoides R. Br. On loose rocks, Lake Superior to 

 Alaska, Colo, and Calif. Alt. 8500-11,500 ft. Near Pagosa Peak; Mt. Hes- 

 perus; Estes Park, Larimer Co.; West Spanish Peak; Twin Lakes; Red 

 Mountain road, south of Ouray; Clear Creek; Fish Creek Falls, Routt Co. 



2. Cryptogramma Stelleri (S. C. Gmel.) Prantl. [Pellaea gracilis Hook.] 

 On moist rocks, Labr. and Pa. to Colo, and Alaska. Alt. 7500-9500 ft. 

 Canons west of Ouray. 



9. CHEILANTHES Sw. LIP-FERN. 



Leaves hairy or tomentose, not scaly. 



Stalks covered with woolly hairs when young, at length nearly smooth. 



i. C. Feei. 



Stalks and rachises with narrow lanceolate scales. 2. C. Eatoni. 



Leaves covered beneath with imbricated scales, not tomentose. 3. C. Fendleri. 



