OP ARTS AND SCIENCES. 185 



NoTHOL^NA CANDIDA, Hooker. At Guajuco in Nuevo Leon, and 

 in mountains northeast of Monclova, Coahuila (1380) ; near Monterey 

 (1381). 



NoTHOL^XA NiVKA, Desv. At Monterey, Nuevo Leon (1386), 

 and in the San Rafael Mountains (9G1 Schafftier). — Var. flava, 

 Hooker, was collected at Lerios (1387), and a form with smaller and 

 more distant pinnules, the powder white, in the Sierra Madre, south 

 of Saltillo (13y5). A Notholcena with fronds 3 to 4 inches long, nar- 

 rower in outline, and with closely placed subcoriaceous pinnules, 

 which may be a form of this species, was found at several places in 

 Coahuila and Nuevo Leon (1382, 1383, 1384). 991 Parry & Palmer 

 is closely allied to these last, but has the short-stalked frond slightly 

 narrowed at the base, and may prove a distinct species. Mr. Dav- 

 enport pronounces N. dealbata only a slender form of N. nivea, 

 and the various intermediate forms, now common in herbaria, justify 

 his view. 



Cheilanthes meifolia. Rootstock short, creeping, chaffy with 

 very narrow acuminate rigid blackish scales : stalks tufted, dark- 

 stramineous, smooth and shining, slender, 6 to 9 inches long; frond 2 

 or 3 inches long and nearly as broad, deltoid, smooth, 4 or 5 times 

 pinnate and cut into innumerable very narrow linear-acuminate seg- 

 ments :' involucres terminal on the segments, orbicular, delicately 

 membranaceous. — At Guajuco, Nuevo Leon (1377). Closely allied 

 to C. Calif ornica, but with the involucres terminal and rounded, in- 

 stead of lateral and crescent-shaped. 



Cheilanthes Wrightii, Hooker, var. (?) At Soledad, Coahuila 

 (1378). More finely divided than C. Wrightii^ and sparingly chaffy 

 along the rhachis, but with the same herbaceous texture and similar 

 involucres. 



Cheilanthes Alabamensis, Hooker. At Georgetown, William- 

 son Co., Texas (1415) ; a few specimens were also collected at Gua- 

 juco, Nuevo Leon, and in the mountains east of Saltillo. 



Cheilanthes microphylla, Swartz. At many stations in Texas, 

 Coahuila and Nuevo Leon, and showing a great variety of forms, some 

 of very large size (1411 to 1414, 1416, 1418 to 1421) ; 981 and 986 

 Parry «& Palmer. — Var. aspidioides. Fee. At Soledad, Coahuila 

 (1417). and in the San Miguelito Mountains (920 Schaffner) ; 984^ 

 Parry & Palmer. 



Cheilanthes Coopers, Eaton. A few specimens not safely 

 separable from this species were collected by Parry & Palmer (989) 

 in the region about San Luis Potosi. 



