﻿Maxon: North American species of Psilogramme 



sparsely and laxly pubescent upon both surfaces, 



Segments larger, the lobes longer and broader, 

 widely divaricate, glabrous above, bearing a 



I. Psilogramme Warscewiczii (Mett.) Kuhn, Gruppe Chaetop. 

 17. 1882. 

 Gymnogramma Warscewiczii Mett. Ann. Sci. Nat. Bot. V. 2: 



211. 1864. 

 Type locality: Cartago, Costa Rica {Warscewicz.). 

 Distribution: Costa Rica and Colombia, ascending to 3,000 



Illustration: Karsten, Fl. Columb. 2: pi. 188, f. 3 (as G. 

 Warscewiczii) , 



Psilogramme Warscewiczii was described by Mettenuis upon 

 two collections, one from the Paramo San Fortunato, Colombia, 

 altitude 2,800 meters {Lindig 290), the other from Cartago, Costa 

 Rica {Warscewicz) ; the latter must be regarded as the type. The 

 original description, which is very complete, points unmistakably 

 to the common Costa Rican plant redescribed by Christ erron- 

 eously as Gymnogramme hirta Desv. It is true that P. hirta and 

 P. Warscewiczii are similar in stature and cut of frond. The 

 former species, however, has the numerous fronds closely fascicu- 

 late upon a very short rhizome, and the lamina conspicuously 

 hispid or hirsute with stiff spreading hairs; whereas in P. War- 

 scewiczii the fronds are borne singly, an inch or more apart, upon 

 a slender, very widely creeping rhizome, and the lamina is in- 

 conspicuously short-villous along the rachises and veins, with lax 

 appressed hairs. The stout stipes and generally sturdy appear- 

 ance of P. Warscewiczii are equally characteristic. Karsten's 

 figure, above cited, agrees well with Costa Rican material and 

 differs only in representing a plant slightly above the 1 

 of the following specimens examined. 



