164 



Pellaea atropurpurea (L.) Link. Under the edges of rounded 

 granite boulders in dry warm situations. Medial. 



Pellaea ternifolia (Cav.) Link. I have a single specimen of 

 what seems to be P. ternifolia but I am inclined to think it is 

 merely a starvling of the next species. Whether the true 

 P. ternifolia occurs in our region is uncertain. Sonoran. 



Pellaea Wrightiana Hook. One of our commonest species ; 

 grows in loose, dry soil under the edges of round granite boul- 

 ders, growing best during the early spring months. Sonoran. 



Pellaea intermedia Mett. Rare on the higher peaks on sili- 

 cious rocks, but found also on the calcareous outlier referred 

 to. Sonoran. 



Asplenium resiliens Kunze. Found only in a few places in 

 dryish soil under overhanging rocks where it is always cool 

 and shaded. Austral. 



Asplenium Trichomanes L. Under rocks in wet, cool, shady 

 places near running water. Cosmopolitan. 



Dryopteris Filix-mas (L.) Schott. This determination will 

 probably have to be revised. The largest fern of the region ; 

 xound only in one cool, moist canon, where it is not very 

 abundant. It forms clusters eight or ten inches in diameter 

 at the base, and the fronds are frequently two feet long. Boreal. 



Phanerophlebia auriculata Underw. Found only in cool, 

 shady, moist situations in a single canon. This locality is the 

 most northern station for this fern yet reported and one of the 

 four stations in the United States from which it is known. 

 Sonoran. 



Filix fragilis (L.) Underw. Rare in the higher parts of the 

 mountains, growing in open canons in wet soil. Cosmopolitan. 



Woodsia Mexicana Fee. Rare on the higher slopes of the 

 Organs ; much more common on other and higher mountains 

 in the Territory. Sonoran. 



A. & M. College, 



Mesilla Park, N. M. 



