Mathewsiane. N. O. Filices. 
TAB. CXXI. 
PotypopiuM BIAURICULATUM. 
Fronde lato-lanceolata pinnata, pinnis sessilibus plerisque op- 
positis approximatis patentissimis lineari-lanceolatis integerri- 
mis basi utrinque auriculatis supra pilosiusculis subtus 
rachibusque dense pubescentibus, soris copiosis uniserialibus 
intra costam et marginem. 
Haz. Chacapoyas, Peru. Mathews, 1836, 
The stipes is about 6 inches long, terete, dark brown, opaque, 
slightly downy. The fructifications are exceedingly copious, 
occupying nearly the whole underside of the pinne, and through- 
out the whole length of the frond. 
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