NO. 1867 AMERICAN rERXS — CHRISTEXSEN 39I 



paris superioris 4 cm. longis reflexis, inframedialibus maximis, 7-9 

 cm. longis, ad 2 cm. latis, obtusis vel breviter acuminatis, apice 

 integro vel serrato excepto ad alam 1.25 mm. latam pinnatifidis, 

 utrinque ad costas costulasque dense setosis, supra inter venas 

 minute pubescentibus. subtus glabriusculis. Laciniis 13-15 jugis, 

 paulum obliquis, subobtusis vel subrotundatis, integris, 3 mm. latis, 

 approximatis, sinubus angustis acutis separatis, basalibus reductis. 

 Venis in laciniis majoribus 10-12 jugis, simplicibus, satis approxi- 

 matis. Soris mediocribus fere medialibus, exindusiatis. Sporangiis 

 glabris. 



This new species I refer to the group of D. Sprcngclii, as it most 

 resembles species of this group in its very abruptly reduced lamina 

 below and in its rather close veins. It will stand in this group be- 

 tween D. lasiopteris and D. Chrisfcnscnii, being intermediate be- 

 tween these species in pubescence, but distinguished by its opposite, 

 horizontal pinnae with rather broad, subpatent and subobtuse seg- 

 ments. Its rachis is not so tomentose as in D. lasiopteris and D. 

 rndls; still not with the microscopical pubescence of D. Christcnsenii. 

 The species could also be considered a member of the group of D. 

 pachyrachis. It will then stand near D. atroruhcus, from which it 

 differs by its closer veins and gray puberulous rachis. 



Allied to this species is another specimen from Bolivia, Miguel 

 Bang 2320, which probably belongs to an undescribed species, but 

 the specimen is too incomplete for a description. It resembles D. 

 Riisbyi in pubescence of the rachis, but while the upper side is almost 

 glabrous, except along the costse, the under side is rather densely 

 hairy throughout. The acute segments have up to 15 pairs of veins. 

 The sori, which are small and covered by a setose indusium, are 

 placed within the margin. The collector's number 2320 is cited in 

 my "Revision" under D. oUgocarpa, but tJiis specimen does not be- 

 long to that species. 



DRYOPTERIS RUDIS (Kunze) C. Chr. 



(Revision 324, No. jT), Fig. 48.) 



Mexico : Sierra de Clavellines, State of Oaxaca, 9,000 ft., Charles L. 

 Smith 2056. Cerro de San Felipe, 3,000 meters, Gon::atti and Gonzalez 

 331. Wet mountain canyon above Cuernavaca, State of Morelos, 

 6,500 ft., Pringle 13773. Sierra Madre near Santa Teresa, Territorio 

 de Tepic, /. A''. Rose 2213. 



Guatemala: San Rafael, Zacatepequez, 6,500 ft., Donncll Smith 2732; 

 2461. 



Costa Rica: Sabanilla de los Granados, 1,200 meters, Alfaro 16302. 

 Vicinity of Coliblanco, about 1,950 meter.«, Maxon 267. 



