262 UNDERWOOD: AMERICAN FERNS 
Liebmann’s types should be, places it among the little-known 
species. 
GLEICHENIA TRACHYRHIzOMA Christ, Bull. Herb. Boiss. IL. @ 
280. 1906. (Type from Valle del Rio Navarro, 1,400 meters, 
Werckle.) . 
GLEICHENIA BREVIPUBIS Christ, Bull. Herb. Boiss. II. 6: 280. 
1906. (Type from Valle del Rio Navarro, Costa Rica, alt. 1,400 
meters, Wercklé.) 
Although Dr. Christ has sent fragments of these two Costa 
Rican species we are unable to differentiate them satisfactorily in 
our synopsis, as they do not show distinctive characters ; Werc- 
klé’s specimens are poorly preserved and do not show essential 
parts of the plants. 
COLUMBIA UNIVERSITY. 
@ 
