Underwood: The Genus Phanerophlebia 



213 



It was next collected by Mr. qnd Mrs. Lemmon, August 12, 1882, 

 in "Conservatory Canon," Huachuca Mountains, Arizona, and 

 ten years later by Professor E. O. Wooton in the Organ Moun- 

 tains, New Mexico. The range of the plant is quite circumscribed 

 as it appears to be confined to northern Mexico and the adjacent 

 portions, of the United States. The following may be referred here. 



\zo— Chihuahua : Pringle, 831 (K, G, N, C, P, U) Palmer, 



450 (K, E, N, P); Hartman, 578 (K, G) (plants mostly imma- 

 ture). 



Arizona: Lemmon, August, 1882 (K, E, G, U, N). . 

 New Mexico: Wooton, May, 1892 (U). 

 Texas : Mexican Boundary Survey (C). 



7. Phanerophlebia macrosora (Baker) 



spidijun juglandifi 



var. viacrosoruni Baker, J 



of 



25 



1887. 



Rootstock unknown : stipes brownish, the color extending 

 throughout the rachis : jjinnae coriaceous, brownish in drying, 

 2.5-3 cm. apart, 18-20 cm. long, 2.5 cm. wide, the apex tapering, 

 the base unequally cuneate with a distmct cartilaginous margin 

 and brownish .spines throughout : veins free, 3 times forked, the 

 primary branch rising from near the base, short, bearing the sorus 

 near its middle: sori very large, hemispheric, 2.5 mm. in diameter, 

 forming a continuous inner row 2 mm. from the midvein and one 

 or two more or less irregular outer rows leaving a considerable 

 bare space near the margin. 



Costa Rica : J. J. Cooper (K, G). 



This very distinct plant was distinguished by Mr. Baker as a 



variety but we can discover no close relation 



lifoliuni 



t- 



to which he united it. It does not appear to be closely related to 



any of the described species of the group, but does show a striking 



affinity with the next species with which it forms a somewhat 



natural group. It is known only from its type locality unless the 



imperfect specimen at Kew collected by Skinner in Guatemala 



should belong here. There are no specimens in the U. S. National 



Herbarium, although the original material was sent thence to Mr. 

 Baker. 



* Mr. Baker's brief description is as follows : " veins all free, conspicuously raised; 

 sori much longer [«VJ tlian in the type " 



r. 



\ 



