4 POLYPODIACEAE. 



1. Cheilanthes Feei Moore. [C. lanuginosa Nutt] On dryish rocks, 111. 

 and Minn, to B. C, Ariz, and Tex. Alt. 4000-9000 ft Trail Glen ; Ute Pass ; 

 West Indian Creek; North Cheyenne Canon; Colorado Springs; Canon City. 



2. Cheilanthes Eatoni Baker. On rocks, Ariz, to Colo, and Texas. Alt. 

 about 5800 ft. Arkansas Canon. 



3. Cheilanthes Fendleri Hook. On dry rocks, Texas to Colo, and Calif. 

 Alt. 5000-8500 ft. Horsetooth Mountain; Cheyenne Canon; Green Moun- 

 tain Falls; Glen Eyrie; Boulder; Arkansas Canon; Manitou. 



10. PELLAEA Link. ROCK-BRAKE. 



Simply pinnate; texture thin; pinnae obtuse, narrower when fertile. 



i. P. Breweri. 

 Bi tri-pinnate ; texture coriaceous. 



Pinnae obtuse or barely acute. 2. P. atropurpurea. 



Pinnae mucronulate. 3- P< Wrightiana. 



1. Pellaea Breweri D. C. Eaton. On rocks, Mont., Ore. and Calif. Re- 

 ported from Colorado, but exact locality not given. 



2. Pellaea atropurpurea (L.) Link. On rocks, New England to B. C., 

 southward to Ga., Texas and Ariz. Alt. about 7500 ft Box Canon, Ouray. 



3. Pellaea Wrightiana Hook. On rocks, Kans. to Texas and Calif. Canon 

 City. 



ii. NOTHOLAENA R. Br. CLOAK-FERN. 



i. Notholaena Fendleri Kunze. On exposed rocks, Wyo. to N. M. and Ariz. 

 Alt. 6000-9500 ft. Cheyenne Canon, base of Pike's Peak; Queen's and 

 William's Canons; Arkansas Canon; Colorado Springs; Ute Pass; Clear 

 Creek Canon, at Dumont; South Cheyenne Canon; between La Veta and 

 Gardner; La Veta; Bergen Park. 



12. ASPLENIUM L. SPLEENWORT. 



Leaves simply pinnate. 



Rachis chestnut brown or blackish. 



Pinnae 2-3 cm. long, auriculate on the upper side at base. 



1. A. platyneuron. 

 Pinnae i cm. long, obliquely oval, not auriculate at base. 



2. A. Trichomanes. 

 Rachis green ; pinnae ovate-rhomboidal, oblique at base. 3. A. viride. 



Leaves bipinnate. 4- A. Andrewsii. 



1. Asplenium platyneuron (L.) Oakes. [A. ebeneum Aiton] On rocks, 

 Me. to Fla., Tex., N. M. and Colo. Green Horn Mountains (Greene). 



2. Asplenium Trichomanes L. On limestone rocks, quite generally east of 

 the Rocky Mountains. Alt. 5000-7000 ft. South Boulder Canon ; Horsetooth 

 Mountain; Horsetooth Gulch. 



3. Asplenium viride Huds. On rocks, N. Br. and Vt. to Alaska, Ore. and 

 Wyo. Reported from Colorado, but exact locality not given. 



4. Asplenium Andrewsii A. Nelson. Sandstone cliff, in Colo. Boulder 

 Creek. 



13. ATHYRIUM Roth. LADY-FERN. 



i. Athyrium Filix-foemina (L.) Roth. In moist, shady places, Newf. to 

 B. C., Calif, and Fla. Alt. about 9000 ft. Near Pagosa Peak; Fish Creek 

 Falls, Routt Co. 



