WOOTON" AND STANDLEY FLOKA OF NEW MEXICO. 23 



5. Cheilanthes myriophylla Desv. Ges. Naturf. Freund. Berlin Mag. 5: 328. 1811. 

 Cheilanthes villosa Davenp. Cat. Davenp. Herb. Suppl. 45. 1883. 



Type locality: South America. 

 Range: Texas to Arizona and southward. 



New Mexico: Big Hatchet Mountains; North Percha Creek; Bishops Cap; Han- 

 over Mountain; Sacramento Mountains. Upper Sonoran Zone. 



6. Cheilanthes Undheimeri Hook. Sp. Fil. 2: 101. pi. 107. A. 1858. 

 Type locality: Western Texas. 



Range: Western Texas to southern Arizona and southward. 



New Mexico: Burro Mountains; Telegraph Mountains; Tres Hermanas; Florida 

 Mountains; Dona Ana and Organ mountains. Among rocks on the lower slopes of 

 the mountains, in the Upper Sonoran Zone. 



6. PELLAEA Link. Cliff brake. 



Sori intramarginal, terminal on the veins as dots, or decurrent, at length confluent, 

 forming a marginal band; indusium formed by the reflexed margin of the pinnules, 

 commonly broad and membranous. 



Our species all belong to the division having coriaceous bluish green pinnules with 



inconspicuous veins, most of them having dark brown or glossy black stipes. They 



occur in crevices and under rocks in the drier mountains at altitudes below 2,000 



meters. 



key to the species. 



Indusium narrow, concealed by the maturing sporangia; stipes 



pinkish-stramineous; rootstocks slender, widely creeping. . 1. P . intermedia. 

 Indusium broad, conspicuous; stipes dark brown to black; root- 

 stocks short and thick, 2 to 3 cm. long. 



Fronds and stipes rough-hairy throughout 2. P. scabra. 



Fronds and stipes glabrous. 



Pinnules obtuse or barely acute. 



Fi'onds pinnate above, bipinnate below; pinnules 

 lanceolate or ovate-lanceolate, 5 to 20 mm. 



long 3. P. atropurpurea. 



Fi'onds quadripinnate below, simpler above; pin- 

 nules oval to cordate-ovate, 5 mm. long or less, 



very numerous 4. P. pulcheUa. 



Pinnules distinctly, although shortly, mucronate. 



Fronds narrowly oblong, bipinnate; pinnae tri- 



foliolate 5. P. ternifolia. 



Fronds broadly lanceolate to deltoid, bipinnate; 

 pinnules numerous on each rachilla, the termi- 

 nal one usually largest 6. P. mucronata. 



1. PeUaea intermedia Mett.; Kuhn, Linnaea 36: 84. 1869. 

 Type locality: Mexico. 



Range: Texas to Arizona. 



New Mexico: Black Range; Burro Mountains; Florida Mountains; Tbrtugaa 

 Mountain; Organ and San Andreas mountains. Dry hills, in the Upper Sonoran Zone. 



2. PeUaea scabra C. Chr. Ind. Fil. 172. 1905. 



Cheilanthes aspera Hook. Sp. Fil. 2: 111. pi. 108. A. 1858, not Kaulf. 1831. 

 Psllaea aspera Baker in Hook. & Baker, Syn. Fil. 148. 1868. 

 Type locality: Western Texas. 

 Range: Western Texas to Arizona. 



New Mexico: Collected by the Mexican Boundary Survey (no. 1581) near the 

 Copper Mines. Dry hUls. 



