Notes on AMERICAN FEeRNS—XII 119 
lections from widely diverse regions of Mexico and 
Guatemala, embraces other puzzling, closely inter- 
related forms. These and the present plant will be 
discussed subsequently, together with C. angustifolia 
: , C. cuneata Link. C. chaerophylla (Mart. & 
Gal.) Kinet C. marginata H. B. K., and C. mem- 
branacea: in their relation to C. Hon aE Hook., 
the type of Mildella. 
EXPLANATION oF Piate 6.—Fig. 1, sterile and fertile frond. Fig. 
2, pinnule with the indusium removed, showing soriation. Fig. 
pinnule, showing indusium. ~ 4, seale from rootstock. Fig. 5, 
scale from bud. Fig. 6, sporan 
[Owing to limited material ial at the time the drawing was 
made, the fertile frond figured is somewhat smaller and less com- 
pound than is usual in this subspecies. —C. A 
WESTERNMOST STATIONS FOR CHEILANTHES FEEI.— 
This species, while exceedingly common in the Mexican 
border region from central Texas to Arizona and widely 
distributed in the central and western parts of the 
United States, is nevertheless very rare in the states 
of the Pacific coast. In addition to the station at 
Almota, southeastern Washington (Piper) and_ the 
recent record from the Providence Mountains, San 
Bernardino County, California, (Parish),’ only the 
following material is known to the writer: Mountain 
Spring, western border of the Colorado Desert, San 
Diego County, California, altitude 600 meters, May 12, 
1894, Internat. Bound. Comm. 3080 (Schoenfeldt, coll.). 
THe Aupine Lapy Frern.—In a recent paper upon 
the genus Athyrium, with particular reference to the 
North American forms referred or related to A. filiz- 
foemina,? Butters has described an American variety 
(var. americanum) of the Old World A. alpestre, pointing 
out as essential characters that “it differs in having 
5 Pellaea re Eilat Bot. Gaz. 24: 262. pl. 18. f. 5, 6. 1896. 
* Bot. Gaz. 65: 334. 
7 Rhodora 19: frie ey me 123. text figs. 1-5. 1917. 
