750 The American Naturalist. [September, 
Ferns Near Colorado Springs, Colorado.—So many thou- 
sands of travellers visit the beautiful city of Colorado Springs every 
year that the following list of the ferns to be found within easy walking 
distance from the end of the car lines may be of interest to botanical 
readers. 
Notholena fendleri Kunze. 
Pteris aquilina L. 
Cheilanthes tomentosa Link. 
C. fendleri Hook. 
C. gracilis (Fee.) Mett. 
Pellea atropurpurea (L.) Link. 
Asplenium trichomanes L. 
A. filix-foemina (L.) Bernh. 
A. septentrionale (L.) Hoffm. 
Phegopteris dryopteris (L.) Fee. 
Dryopteris filiz-mas (L.}) Schott. 
Cystopteris fragilis (L.) Bernh. 
C. fragilis dentata Hook. 
C. bulbifera (L.) Bernh. 
Woodsia scopulina D. C. Eaton. 
W. oregona D. ©. Eaton. 
W. obtusa (Spreng) Tore. 
Botrychium virginianum (L.) Swz. 
. matricariaefolium A. Br. 
A few notes on the above list may be of interest. There is a good deal 
of individuality about the Colorado climate, and the same is true of its 
ferns and their habits. The Woodsia and the Pteris are almost the only 
ferns found jon the open hillsides, and these but sparingly; the others 
seek the protection of the mountain cafions. Most of them prefer 
cafions opening toward the north. During three summers spent in 
Colorado I do not remember finding a single fern in any canon opening 
toward the south. 
In Notholena fendleri we are told that the pinnules are oval in mature 
specimens. In most young fronds I have found them deltoid or spatu- 
late, and in some beautiful specimens this form is retained. In such — 
ferns the stipes are lighter in color and weight, the zigzag course of 
the rachis is less pronounced, the pinne are more distant, and the 
pinnules less numerous, giving the specimens a much lighter and more 
graceful appearance. The departure from the normal form is worth 
noting, but not sufficient to constitute a variety. 
Cheilanthes tomentosa, according to the books, is from eight to fifteen 
inches in length at maturity. Most specimens live up to the rule, but 
