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THE FERN BULLETIN 



ferent from any that have been named before that I 

 feel warranted in naming it 



Cystopteris fragilis tenuifolia sub-sp. nov. 



Stipes 4 to 6 inches long, brownish ; blade lanceolate 

 10 to 14= inches long, 6 to 8 inches broad, bipinnate ; 

 primary pinnae distant, about ten pairs 1 to lyi inches, 

 broad at base tapering to a slender tip ; secondary pin- 

 nae lanceolate deeply cut into four or more pairs of 

 obovate segments ; sori one to each segment, large for 

 the genus ; indusium, heavy, persistent. Found in rich 

 soil, Carr Canyon Huachuca Mountains, Arizona by 

 James H. Ferriss, November 1907. Type in my her- 

 barium. 



In appearance this is very distinct from the ordinary 

 forms of Cystopteris fragilis. The type is described as 

 having fronds from 4 to 8 inches long and 1 to 2^ 

 inches broad. This is more than twice as long and 

 three times as broad. A distinguishing feature of the 

 type is found in the secondary pinnae which are decur- 

 rent on the rachis but in this the wing is not visible to 

 the unaided eye. Unlike the type, also, this grows up- 

 right in rich soil instead of more or less spreading on 

 rocks. Specimens identical with this were collected 

 many years ago in Conservatory Canyon by J. G. Lem- 

 mon who also noted its deviation from the type. Al- 

 though his labels read "A very curious form/' he 

 neither named nor described it. Conservatory Canyon 

 is only a few miles distant from Carr Canyon and it is 

 probable that the fern is not uncommon in the region. 

 Without doubt the plant owes its slender pinnules and 

 marginless rachis to the conditions which prevail in its 

 habitat, but it is a strongly marked plant that ap- 

 parently does not intergrade with the type and which 



