4 POLYPODIACEAE. 



I. 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; Caiion City. 



z. 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. sooo-8500 ft. — Horsetooth Mountain; Cheyenne Caiion; 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. z. 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. — Caiion 

 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 Cations ; Arkansas Canon ; Colorado Springs ; Ute Pass ; Clear 

 Creek Caiion, 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. 



I. Asplenium platyneuron (L.) Oakes. [A. ebeneum Alton] On rocks, 

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



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

 the Rocky Mountains. — Alt. 5000-7000 ft. — South Boulder Caiion ; 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.— Ntar Pagosa Peak; Fish Creek 

 Falls, Routt Co. 



