UNDERWOOD: AMERICAN FERNS 261 
1887. Having already described a new species (Gleichenia inter- 
media) from the collections of J. J. Cooper, he evidently lost cour- 
age upon finding two others in the same collection undescribed and 
referred them both, as varieties, to his G. intermedia. One of 
these is D. orthoclada, described by Dr. Christ, and the other is 
the present species, whichis the most peculiar of all the anoma- 
lies in a strange genus. We were at first inclined to regard the 
scrappy material collected by Cooper as a sport, but ample mate- 
rial collected by Mr. Maxon places us in the possession of a suffi- 
cient illustration of the species to doubt its normality no longer. 
18. Dicranopteris strictissima (Christ). 
Gleichenia strictissima Christ, Bull. Herb. Boiss. II. 5: 13. 
1905. 
Gleichenia glaucina Christ, Bull. Herb. Boiss. II. 6: 283. 1906. 
(Type from Navarro, Costa Rica.) . 
Type LocaLity: Costa Rica, Wercklé 215. 
Distrisution : Known only from Costa Rica, alt. 1450-1550 
meters, 
With specimens communicated from Dr. Christ before us, we 
are not able to separate these two species. Werckle’s specimens, 
unfortunately, do not give us good representatives of the species. 
More recently however Mr. Maxon has gathered some beautifully 
preserved specimens from La Palma (0. 432); these are of the 
Slaucina type being. strikingly glaucous beneath, a character on 
which too much reliance should not be placed in separating the 
members of this genus. The original G. strictissima has smooth 
but not glaucous under surfaces, but seems to differ in no other 
Way. 
SPECIES INQUIRENDAE 
MERTENSIA GLEICHENIOIDES Liebm. Mex. Bregner 144. 1849. 
(Type from Cuapa, Dept. Vera Cruz, Mexico, Liebmann.) 
Gleichenia Leibmanni Moore, Ind. Fil. 379. 1862. 
This species we have never seen. A tracing of a single fork 
appears in the collection of Mettenius at Berlin, and shows a 
narrow elongate pinna with crenately lobed segments wholly 
Unique in the genus. It is only known from its type collection, 
‘nd Mr. Christensen, who is at the Copenhagen museum where 
