KO. 1867 AMERICAN FERXS — CIIRISTENSEN 37I 



characters agree very well. Still, it is very probable that this D. 

 oligocarpa is a collective species which includes several "elementary 

 species," the limitations of which I am unable to define at present. 



St. Kitts : Summit of Mt. Misery, Britton and Cozvell 529. 



Haiti: Without locality, Jaeger. (As the preceding rather doubtful.) 



Jam.a.ica: Cuna Cuna Pass, on banks, Frcdholm 3234. Swift River near 



Hope Bay, Alex. Moore. In the vicinity of Castleton, edge of Ginger 



River, Maxon 835. 

 Cuba: Upper slopes and summit of Gran Piedra, Oriente, 900 to 1,200 



meters, moist shaded bank, Maxon 4041a. 

 i\lExico : Pedro Paulo, Territorio de Tepic, Rose 3330. 

 Costa Rica : Juan Vinas, Reventazon Valley, 1,000 meters, on bank by 



road-side, Cook and Doyle 193. 



DRYOPTERIS NAVARRENSIS Christ 



Aspidiuin navarrcnsc Christ, Bull. Herb. Boiss. H. 6: 160. 1906. 

 Dryopteris navarrensis Christ, Bull. Herb. Boiss. H. 7:262. 1907. 



Costa Rica : Navarro, Werckle. 



This species, which in my "Revision" I regarded as a variety of 

 D. pilosula, may stand preferably as a distinct species, differing from 

 D. pilosula by its exindusiate sori. The rachis, costse, and veins are, 

 especially beneath, clothed with long whitish patent hairs. Some 

 specimens from Jamaica {Hart 304), distributed as Nephrodium 

 contcriniiiuiii var. puhcscens Baker, agree almost exactly with the 

 Costa Rican plants. Probably this is the species described as 

 "Polypodium puhesccns Raddi" by Jenman (Bull. Bot. Dept. Jamaica 

 II. 4: 128. 1897). 



DRYOPTERIS NOCKIANA (Jenman) C. Chr. 



(Revision 279, No. 8, Fig. 7 (small).) 



In my "Revision" I have compared this species, endemic in Ja- 

 maica, to D. panamensis and D. oligocarpa. Having now seen 

 numerous specimens, I find that the species very much resembles D. 

 concinna in habit and pubescence, but that it can be distinguished 

 at the first glance by its glandular under surface and by its densely 

 setose, persistent indusia. As a rule the hairs of the rachis and 

 midribs below are longer than those of D. concinna, but in some 

 specimens one finds the characteristic minute pubescence of that 

 species. 



D. Nockiana, besides a type specimen from Jenman's herbarium, 

 is represented in the U. S. National Herbarium by the following 

 specimens from different localities in Jamaica, ranging vertically 



