Underwood: The Genus Piianeropiilebia 207 



Pinnae 18-20 cm. or more long ; normally set at an angle of 30-40° with the 



rachis. 

 Sori in a single row with two others incomplete, 2.5 mm. in diameter. 



7. P. inacrosora. 



Sori usually in four or less complete rows, small, 1.2 mm. wide. 



8. r. Guatcmaleusis. 



I. Phanerophleria juglandifolia (H. & B.) J. Sm. Hook. Jour. 



Bot 4: 187. 1842. 



Poly podium jnglandifolium litimb. & Bonp. ; Willd. Sp. PI. 



5 : 195- iSiO- 



pidinni jughindifot 

 irto m ill m jug! a n dift 

 mblya juglandifolia 



Z^Z- 1847. 

 m, Ixxxiii. 1857. 



pl.y.f.j. 1836. 



Rootstock short, ascending, with few scales : stipes slender, 

 rarely with a few straggling scales, stramineous, 30-40 cm. long : 

 pinnae 5-1 1 (mostly 7-9), 3-5 cm. apart, often with a tuft of to- 

 mentose scales in the axils, the terminal largest, 20x5 cm., the 

 lowest smallest, 12X4-5 cm., often falcate; base obtuse; ape: 

 acute and often strongly acuminate ; margin undulate below, be- 

 coming more and more distinctly serrulate toward the apex ; tex- 

 ture subcoriaceous with a cartilaginous margin which extends into 

 shoi-t rigid teeth, 0.5 mm. long; veins anastomosing throughout, 

 the first row of areolae elongate, 1.5 cm., mostly with a free in- 

 cluded veinlet which bears the first sorus about a millimeter from 

 the base, the outer areolae smaller : sori 1.5 mm. across, the inner 

 series 2 mm. from the midrib, the second scries 5-7 mm. further 

 out, a partial third series 2 mm. still farther removed from the 

 midrib. 



The type of this species is in Willdenow's collection at Berlin 

 and is marked 434 Caripe,^ Humboldt. This is almost exactly 

 matched by a considerable number of specimens in various collec- 

 tions as follows :t 



*Caripe, not always shown on the maps, is near the north coast of Venezuela, 28 



kilometers S. S. E. from Cumana. 



t In the citation of specimens it is desirable to indicate in what collections speci- 

 mens have been examined, both to convey information as to where specimens of any 

 given species can be consulted and because of variations existing under the same num- 

 ber of certain collectors. In this paper the herbaria are designated as follows:—!?, 

 Berlin;— C, Columbia ;—D, Davenport (Massachusetts Horticultural Society);— E, 

 D. C. Eaton, New Haven ;—G, Gray, Cambridge ;—K, Kew ;— N, United States 

 National Museum, Washington ;— P, Thiladelphia Academy of Sciences ;— U, the 

 writer* s own collection. 



