M\\<).\ STUDIES OF TROPICAL AMERICAN FERNS. 503 



7 to s mm. broad near the base, obtuselj cuneate, stalked (2 to 3 mm.), long- 

 attenuate, in drying folded along the midrib. 



Type in the i ■ S. National Herbarium, no. 174000, collected a1 Juau Vifias, 

 valley <>t' the Reventaz6n, Costa Rica, altitude 1,000 meters, by O. I. < '<m.u 

 and < '. B. Doyle (no. 208), April 22, 1903. Less perfect specimens are those 

 collected by Werckl§ and bj Cooper, both without exacl locality In Costa Rica. 

 Known also Prom Guatemala upon ;i specimen collected by \<>n Tiirckheim at 

 s;nii;il;i. Alin Wr;i i laz, altitude 1,200 meters, February, L887 (J. D. 8. 1129), In 

 the herbarium <>f Capt. John Donnell Smith. 



The present species is probablj most closely allied i<> the true 8. sorbifolia ' 

 which appears to be strictly a West Indian species. II differs in Its darker 

 almost reddish chaff, in having the frond not reduced below or only very 

 slightly si*, in the longer and relatively narrower pinnae, these tapering and 

 long-attenuate from near the middle and nol from the outer third as in 8, 

 sorbifolia. 



°As delimited by Professor Underwood, Bull. Torr. Club 33: 591-605. 1907. 



