FLOWERING PLANTS AND FERNS OF ARIZONA 39 



feet, dry rocky slopes and in crevices of limestone ledges. South- 

 western Texas to Arizona and Mexico. 



2. Pellaea suksdorfiana Butters, Amer. Fern Jour. 11: 40. 1921. 



Pellaea glabella var. simplex Butters, Amer. Fern Jour. 7: 84. 

 1917. 



Near Jacobs Lake, Kaibab Plateau, 8,000 feet, on rocky southern 

 slopes (Korstian and Baker in 1917). British Columbia and Washing- 

 ton, south to Utah, New Mexico, and Arizona. 



3. Pellaea atropurpurea (L.) Link, Fil. Sp. Hort. Berol. 59. 1841. 



Pteris atropurpurea L., Sp. PI. 107G. 1753. 



Heber (Navajo County), and mountains of Cochise and Pima 

 Counties, 5,000 to 6,500 leet, on cliffs. Vermont and Ontario to 

 Wisconsin and western South Dakota, south to northwestern Florida, 

 the Gulf States, New Mexico, and Arizona; Mexico and western 

 Guatemala. 



4. Pellaea longimucronata Hook., Sp. Fil. 2: 143. 1858. 



Pellaea wrightiana var. longimucronata Davenp., Cat. Daven- 

 port Herbarium Sup. 46. 1883. 

 Pellaea truncata Goodding, Muhlenbergia 8: 94. 1912. 



Grand Canyon (Coconino County) to Kingman (Mohave County), 

 south to the mountains of Cochise and Pima Counties, 2,000 to 6,000 

 feet, among rocks and on cliffs; very common. Colorado and New 

 Mexico, west to Nevada and Arizona; northern Mexico (Chihuahua). 

 The type of P. truncata is from the Mule Mountains (Goodding 977). 



5. Pellaea wrightiana Hook., Sp. Fil. 2: 142. 1858. 



Near Flagstaff (Coconino County), mountains of Graham, Gila, 

 Cochise, Santa Cruz, and Pima Counties, 5,000 to 8,000 feet, among 

 rocks and on cliffs. Southwestern Oklahoma and central Texas, west 

 to Arizona. 



6. Pellaea ternifolia (Cav.) Link, Fil. Sp. Hort. Berol. 59. 1841. 



Pteris ternifolia Cav., Desc. PI. 266. 1802. 



Huachuca Mountains, Cochise County, on dry cliffs {Patzky in 

 1899, Goodding 766). Western Texas and southeastern Arizona; 

 Mexico to Peru; Hispaniola. 



17. NOTHOLAENA. Cloakfern 



Small, rock-loving, xerophilous ferns, with glandular, ceraceous, 

 paleaceous, or hairy foliage; fronds rigid, the blades 1- to 4-pinnate, 

 linear to deltoid or pentagonal; sori mostly submarginal, roundish or 

 oblong, borne at or near the end of the veins (in some 4 species decur- 

 rent), somewhat confluent laterally. Indusia wanting, the margins 

 mostly recurved and partially covering the sporangia. 



Key to the species 



1. Blades simply pinnate (2). 



2. Pinnae coarsely lobed, deciduously stellate-paleaceous above, very densely 



imbricate-paleaceous beneath 1. X. sinuata. 



2. Pinnae pinnatifid (segments narrow), villosulous above, densely tomentose 



beneath 2. X. aikea. 



