UNDERWOOD: AMERICAN FERNS 253 
This very distinct species was first collected by J. J. Cooper 
and was referred by Mr. Baker to the all-embracing Gleichenia 
pubescens, as “a large glabrous form.” From Cooper’s fragment 
we had recognized a plant unique and distinct from any known 
species as early as 1898; the material then at hand was too 
meager for description. 
3. Dicranopteris Brunei (Christ). 
Gleichenia Brunei Christ, Bull. Herb. Boiss. II. 5: 13. 1905. 
TyPE LocaLity: El Desengano, Costa Rica, Brune. 
DistripuTIon: Known only from its type collection. Dr. 
Christ has kindly favored me with a part of spray which appears 
to be rather close to D. Bancroftii. 
4. Dicranopteris costaricensis sp. nov. 
A flabellate, 3-4-forked plant with narrow pinnae. Rootstock 
creeping ; main stalk slender, 2 mm. in diameter, smoothish or 
with scattered scales; primary forks diverging at an angle of 100°, 
the primary internodes 4—8 cm. long, with 1 or 2 small obtuse lobes 
at the base ; terminal bud large with dark-brown, ciliate-margined 
scales, sometimes forming a forking of the second order ; secondary 
branching diverging at an angle of 80°—g0°, the secondary inter- 
nodes 4~6 cm. long, pinnate on one or both sides in the lower 
half; tertiary branching at an angle of 40°-60°, the internodes 
5-6 cm. long, uniformly pinnate throughout, sometimes not form- 
ing a quaternary fork ; pinnae 12-20 cm. long, 1.25-2 cm. wide, 
the segments short, glaucous underneath, with strongly revolute 
Margins ; veins once forked; rachises more or less densely cov- 
ered underneath with delicate brown ciliated scales ; sporangia in 
3's or 4’s. 
Type from Costa Rica, Volcan Poas, alt. 2600 meters, a 
Donnell Smith 6859, Volcan de Turrialba, alt. 2800 meters, 
Pittier (J. D. S. 7486). 
This very distinct Costa Rican species has been confused ed 
nearly every writer with Gleichenia revoluta H. & B., a species 
described from Ecuador, which differs materially in its narrower 
pinnae, different vestiture of the segments, and different bud-scales 
and decurrence of the segments on the internodes. 
5. Dicranopteris cubensis sp. nov. 
A straggling plant of wayside banks, with stems a meter or 
h 
mote high. Rootstocks wide-creeping, slender ; 3-forked at the 
