XO. 1867 AMERICAN FERXS — CHRISTENSEN 383 



gist prefer to let D. Jenmani stand as a distinct species I shall ap- 

 prove it. 



1. Form without glands [D. Jenmani (Baker) C. Chr.]. 



St. Vincent: H. H. and G. W. Smith 855. 



Jamaica: Without , special locality, Jenman; Hart 281(7, 215. Latimer 



River, 4,000 ft., Clut€ 142. Vicinity of Morce's Gap, 1,500 meters, 



moist wooded slope, Maxon 2679. 



2. Glandulose form [D. Germaniana var. glandulosa C. Chr., Re- 

 vision 311]. 



Jamaica : Near the summit of Blue Mountain Peak, 7,000 ft., steep 

 moist wooded slope, Maxon 1404 (= Underwood 2529) ; moist woods, 

 Maxon 1422 (= Und. 2540), 1422a; Underwood 1496. 



DRYOPTERIS RORAIMENSIS (Baker) C. Chr. 



Polypodium roraimensc Baker, Timehri 5: 214. 1886; Trans. Linn. Soc. IL 



Bot. 2: 291. 1887. 

 Dryopteris roraiinensis C. Chr. Index Fil. 289. 1905. 



British Guiana : Mount Roraima, upper slope, im Thiirn 168 (type num- 

 ber). 



A weakly characterized species, not unlike D. pachyracJiis in essen- 

 tial characters, but having the mider side of the lamina without 

 glands, the segments oblique or subfalcate, obtuse, sori exindusiate, 

 and the 3 or 4 pairs of lower pinnae reflexed. 



Leaf gradually and shortly attenuate downwards, with 2 or 3 

 pairs of reduced pinnae, the lowermost about i cm. long. The whole 

 leiaf glabrous, except as to rachis and costse, these setose above. 

 Veins distant, 6 or 7 to a side, simple. Sori about medial or slightly 

 supramedial, globose, superficial, exindusiate. Sporangia glabrous. 



In the key to species given in my "Revision" (p. 267) this species 

 must be placed between no. 44, D. pachyrachis, and no. 45, D. Hiero- 

 nymusii. It differs from this latter mainly in its lower reflexed 

 pinnae and its more oblique or even subfalcate segments. 



DRYOPTERIS RUSTICA (Fee) C. Chr. 



(Revision 310, No. 53.) 

 St. Vincent: H. H. and G. W. Smith 1130. 



Agreeing very well with the type from Guadeloupe. Known also 

 from Jamaica (Nephrodium nimbatum Jenm.). 



