﻿84 Maxon : North American species of Psilogramme 



densely short-villose ; secondary pinnae approximate or mostly 

 apart, short-petiolate, deltoid-oblong, the basal ones reflexed, up 

 to 4.5 cm. long, the others spreading; pinnules 4 or 5 pairs, spread- 

 ing or slightly reflexed, rounded-triangular or narrowly subovate 

 in outline, the larger ones cut to the narrowly marginate costa, 

 with about 2 pairs of deeply cleft dichotomo-flabellate segments, 

 the ultimate divisions i to 1.5 mm. long and about i mm. broad, 

 their tips narrowly emarginate to the slender brownish vein ; leaf 

 tissue delicately herbaceous, together with the rachises and costae 

 densely short-villose beneath, more sparsely so above, the hairs 

 similar to those of the primary rachis or a little longer and stifTer; 

 sporangia very numerous, usually borne throughout the veins of 

 the segments and almost wholly covering the leaf surface, with 

 numerous hairs intermixed. 



Type in the U. S. National Herbarium, no. 471992, collected 

 upon the Cerro de las Vueltas, Costa Rica, altitude 3,000 meters,. 

 January, 1897, by H. Pittier {no. 10502). A second sheet of this 

 collection contains two laminae which are smaller but otherwise 

 identical. 



This, which is a very distinct species, is founded upon one of 

 the two members cited by Christ* as representing Gymnogramme 

 Warscewiczii; but it agrees not at all either with Mettenius's 

 excellent description or with Karsten's later illustration. The 

 second specimen cited by Christ (El Paramo, region du General,. 

 Pittier 10452) is probably still another species. 

 6. Psilogramme haematodes (Christ) Maxon. 



Gymnogramma haematodes Christ, Bull. Herb. Boiss. H. 4: 

 1097. 1904. 



Type locality: Summit of Volcan de Poas, Costa Rica, 

 altitude 2,644 meters {Tonduz 10713). 



Distribution: Upper slopes and summits of the volcanoes 

 Pods, Barba, Irazu, and Turrialba, Costa Rica, altitude 2,400 ta 

 2,644 meters. 



This species, well described by Christ, is exceedingly well 

 marked by its minute, short, slightly pubescent, close-set ultimate 

 segments. It can hardly be confused with any North American 

 species, except possibly the plant here listed as P. refracta. 



Costa Rica: Summit of Volcdn de Poas, alt. 2,644 meters, 



* Bull. Herb. Boiss. II. 4: 1098- 1904. ~~ 



