144 Proceedings of the Biological Society of Washington . 



Holzinger ; Big Hatchet Mountains, Grant County, Mearns 224; North 

 Percha Creek, south end of Black Range, alt. 1800 meters, on limestone, 

 Metcalfe P52; Bishop's Cap, Organ Mountains, Oct. 21, 1906, Wooton & 

 Standley. 



Texas: El Paso, Mearns 231, Stearns 215; near Sierra Blanca, Rose, 

 Standley & Russell 12238a. 



Mexico: Santa Eulalia Mountains, Chihuahua, July 30, 1885, Wilk- 

 inson; Sierra Mojada, Coahuila, Jones 532. 



3. Cheilanthes Fendleri Hook. Sp. Fit. 2 : 103. pi. 101. B. 1852. 



Rhizome epigean, wide-creeping (5-12 cm.), slender (1-2 mm. in 

 diameter), simple or with a few, usually short branches, terete, often 

 flexuous, light brown, subpersistently paleaceous, the scales loosely 

 imbricate, secund, narrowly ovate, long-acuminate to attenuate, 2-2.5 

 mm. long, 0.6-0.8 mm. broad, straight or falcate, entire, membranaceous, 

 translucent, very pale brown, concolorous or nearly so. Fronds several, 

 erect, distichous, evenly spaced about 1 cm. apart or often subfasciculate 

 at the ends of the branches, 8-30 cm. long; stipe 0.4-1.2 mm. in diam- 

 eter, 3-18 cm. long, somewhat flexuous above the arcuate base, brownish- 

 castaneous, sublustrous, persistently paleaceous, the numerous scales 

 pale, linear-attenuate to filiform, mostly small, ascending or subap- 

 pressed ; lamina narrowly oblong-lanceolate to ovate-lanceolate, acum- 

 inate, 5-14 cm. long, 2-3.5 cm. broad, tripinnate, the tertiary segments 

 simple to ternately cleft or divided; rachis similar to the stipe ; pinnae 

 contiguous to distant, mostly alternate, oblique, subarcuate, for the most 

 part narrowly oblong to elongate-triangular and acuminate, the largest 

 ones more broadly triangular or sometimes ovate-triangular, strongly 

 inequilateral (broader below); secondary and principal tertiary rachises 

 bearing numerous spreading loosely imbricate scales beneath, these rela- 

 tively large, variable in number and disposition, usually exceeding the 

 segments, partially or sometimes wholly concealing them, tawny to light 

 reddish brown, paler toward the margin, oblique, firmly and rather 

 broadly attached at the rounded or subcordate base, ovate and long- 

 acuminate to ovate-lanceolate and long-attenuate, denticulate, not at 

 all ciliate, the cells irregularly elongate, with sinuous partition walls; 

 segments close or usually distant, mostly oblique, broadly rounded-obo- 

 vate to cuneiform, the terminal ones the largest, these strongly cuneate 

 and obliquely cleft, the largest basal ones also sometimes 2-3-cleft or 

 divided; sporangia few, large, borne within the strongly recurved apical 

 border of the segments or its lobes, the margin slightly modified. 

 Leaf tissue rigidly herbaceous, bright green, minutely papillose, glistening. 



Cheilanthes Fendleri was founded on specimens collected " somewhere 

 about Santa Fe,"* New Mexico, in 1847, by A. Fendler (no. 1015). The 

 original collection is missing from the National Hebarium ; but of the 

 two closely related species of the Mexican Border region heretofore con- 

 fused under this name the description points rather plainly to the plant 

 with nonciliate scales, and as the Gray Herbarium specimen agrees, 



•Standley, Contr. U. S. Nat. Herb. 13 : 175. 1910. 



