408 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
oblique, exceeding the sorus, terminating in a slender hydathode remote from the 
Tachis; sori round, relatively large, lying against the rachis at maturity, distinct or 
(in small fronds) fully confluent; annulus consisting of 15 or 16 cells; spores sub- 
globose, shallowly granulate. 
Type in the U. 8. National Herbarium, no. 575795, collected upon a stump at the 
edge of the forest near La Palma, Costa Rica, altitude 1,450 to 1,550 meters, May 6 to 
8, 1906, by William R. Maxon (no. 406). 
The following additional specimens are in the U. 8. National Herbarium: 
Costa Rica: Cafias Gordas, alt. 1,100 meters, Pittier 10976, in part. Vallé de 
Agua Buena (Cafias Gordas), Pittier 10973. San Jeronimo, alt. 1,500 meters, 
Wercklé (Jimenez, no. 557). Also several specimens without exact locality, 
Wercklé (ex herb. Christ). 
GUATEMALA: Forests near Coban, Alta Verapaz, alt. 1,350 meters, von Tiirckheim 
(J. D. Smith, no. 946). Vicinity of Cacao (between Panzés and Senahd), 
Barber 160. 
Polypodium blepharodes belongs to the group of P. trichomanoides and apparently 
is most nearly allied to P. daguense Hieron. and P. tagufolium Jenman (P. sintenisii 
Hieron.). From the former species, known only from Colombia, it differs in its 
larger, narrower, and more freely ciliate rhizome scales, its differently shaped seg- 
ments, and its much longer leaf bristles, and in having the veins forked far below 
their middle, the proximal branch being longer than in P. daguense. From the West 
Indian P. taenifolium it differs widely in the cellular structure and color of its rhizome 
scales, in its longer fertile veinlets, and in its smaller and differently shaped fronds 
which are more freely setose, the hairs also much longer. 
In some: respects P. blepharodes recalls the problematical P. gibbosum Fée, but 
that imperfectly described species, whose exact origin also is doubtful, is figured by 
Fée as having few pinnules, the lower ones very long-decurrent upon the rachis, and 
the annulus is said to have 11 or 12 cells; in none of which characters does P. blepha- 
rodes agree. 
Polypodium cookii Underw. & Maxon, sp. nov. 
Rhizome erect, about 8 mm. long, 5 mm. in diameter, bearing 4 to 8 erect closely 
fasciculate fronds from 3 to 7 cm. long; scales of the rhizome borne in a relatively 
conspicuous terminal tuft, pale yellowish brown in mass, concolorous, about 1.5 mm, 
long, deltoid-lanceolate or narrowly deltoid-ovate, entire, devoid of cilia or marginal 
teeth, attached just above the rounded base, attenuate, terminating in a slender 
curved tip consisting of a single series of 3 or 4 oblong cells; scales 7 to 12 cells broad 
in the basal part, the cells broadly to narrowly oblong, uniformly lutescent, trans- 
lucent, the partition walls darker optically, thin but very distinct; stipe up to 7 mm. 
long, subterete, 0.5 mm. thick, or sometimes obsolete, the rachis then narrowly alate 
to the base of the frond; lamina 3 to 6.5 cm. long, 3 to5 mm. broad, linear or sometimes 
very gradually narrower in the apical half (the tip short, noncaudate, obtusely lobed), 
pinnatifid throughout to within 0.5 mm. of the rachis, the basal portion slightly 
narrowed, only the lowermost pair of segments broadly triangular and long-decurrent; 
segments monosorous, 15 to 30 pairs, close, slightly oblique, all but the basal pair 
broadly oblong, nearly equilateral, obtusely rounded, long-setose (like the whole 
lamina), the hairs reddish brown, 1 to 1.6 mm. long, especially numerous at the 
minutely crenulate apices of the segments and upon the lower side of the rachis; veins 
simple, terminating in a conspicuous elliptical hydathode remote from the apex of 
the segment, slightly arcuate at the base, or those of the fertile segments more strongly 
so, the sorus being borne upon a roundish receptacle at the upper side of the bend 
of the vein; sori roundish, a little more than 1 mm. in diameter, nearly basal, spreading 
againsi the rachis and confluent at maturity; annulus consisting of 14 cells; spores 
subglobose, shallowly granulate. Leaf tissue rigidly spongiose-chartaceous, glandular- 
