TWO NEW FERNS OF THE GENUS LINDSAEA 

 By LUCIEN M. UNDERWOOD and WILLIAM R. MAXON 



The two ferns of the genus Lindsaea here to be described, one 

 from Colombia, the other from Cuba, we regard as very distinct 

 and readily recognizable ; otherwise we should hesitate to add to the 

 list of names in a genus so thoroughly in need of careful revision. 



LINDSAEA PITTIERI Underwood & Maxon, sp. nov. 



Apparently mature plants 10 to 11.5 cm. high. Rhizome very 

 short-creeping, with close-set, bright brown, glistening, narrow, 

 lanceolate-attenuate scales about 1 mm. in length; fronds subces- 

 pitose, conform, erect, simply pinnate, very dark green; stipes 2.5 

 to 3 cm. long, relatively stout (about 0.75 mm. in diameter), casta- 

 neous, smooth, lustrous, convex dorsally, the upper surface concave 

 with two narrow greenish-yellow wings extending to the quad- 

 rangular rachis; lamina exactly lanceolate, 8 to 9 cm. long, with 

 about 10 pairs of approximate or somewhat spaced pinnae and a 

 hastate unequal terminal segment (3 cm. long) ; pinnae nearly sessile, 

 spreading, the lowermost pair lunate and strongly deflexed, the lower 

 margin nearly parallel to the rachis, the other pinnae subopposite and 

 nearly of equal size, 11 to 13 mm. long, 5 mm. maximum width, 

 decidedly lunulate, spreading or somewhat deflexed, at the base 

 sharply cuneate, the inner margin (length 5 mm.) slightly concave 

 and parallel to the rachis, the superior margin continuously rounded, 

 the lower decurved; venation free, oblique, repeatedly dichotomous,' 

 ultimate veinlets 10; sori continuous, following the deeply curved 

 upper margin from the base above around the subobtuse apex ; in- 

 dusium narrow (less than 0.5 mm. broad), one-third or less as wide 

 as the opposed indusiform margin, at maturity the sporangia distant 

 about 1 mm. from the sharply and irregularly erose margin. 



Type in the U. S. National Museum, sheet no. 530,720, collected 

 at an altitude of 30 to 100 meters near Cordoba, in the Dagua Valley, 

 Pacific coastal zone, State of Cauca, Colombia, in December, 1905,' 

 by H. Pittier, no. 533. 



L. Pittieri probably finds its nearest ally in L. Leprieurii Hook., 1 

 a French Guianan species erroneously referred to L. falcata by 



1 Sp. Fil. 1 : 208, pi 62. D. 1846. 



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