PROF. OLIVER ON NEW PLANTS FROM RORAIMA. 289 



praeter venas primarias faciei superioris glabris, pinnis oblongo-lanceolatis, pinnulis 



lauccolatis inferioribus distincte petiolatis basi truncatis ad costam alatani pinna- 



tilidis, segmentis tertiariis oblongis crcuulatis, venis simplicibus erecto-patentibus 



6-6-jugis, soris magais globosis superficialibus intramarginalibus, receptacvilis dense 



paraphysatis. 



Basal paleae extending 4-5 inches up the stipe, glossy, moderately firm in texture, the 



largest •£ in. long. Stipe a foot long, brownish, deeply grooved down the face. Lower 



pinnae 15-18 in. long, 8-9 in. broad. Lower pinnules 1 in. long f in. broad, with a 



petiole ^ in. long, which is articulated at the base. Tertiary segments £ in. broad. 



Allied to the Bahian A. prcec'mcta, from which it differs by its more coriaceous texture, 

 crowded sori, and densely paraphysate receptacle. 



37. Alsophila villosa, Presl. 



318 (1G*). Hymenophyllum dejectum, n. sp. ; stipitibus productis paleis pallidis ascen- 

 dentibus lanceolatis praeditis, frondibus oblongo-lanceolatis tripinnatifidis erectis 

 glabris, pinnis lanceolatis confertis decurvatis pinnulis, superioribus simplicibus infe- 

 rioribus profunde pinnatifidis, segmeutis ultimis linearibus integris uninervatis, soris 

 breviter pedicellatis ad basin segmentorum ultimorum impositis, involucro campa- 

 nulato valvis argute serratis. 

 Rootstock not seen. Stipes 2-3 in. long, clothed with minute inconspicuous pale 



membranous paleae, as is also the rhachis. Lamina 4-5 in. long, |— 1 in. broad. Pinna? 



decurved, not more than J— | in. long. Final segments tV - 1j m - long, not more than 



^ line broad. Involucre \ line broad. 



A very distinct novelty. Allied to //. demissum and H. javanicum. 



118. 199, 371. ITymenophyllum polyanthos, Sw. Upper slope of the mountain. 



207, 302, 370, 372, 373. Hymenophyllum microcarpum, ITook. Upper slope of the 



mountain. This is evidently not more than a variety of H. polyanthos. 

 205. Hymenophyllum cbjspum, H. B. K. Upper slope of the mountain. 

 203, 375. Hymenophyllum lineare, Sw. Upper slope of the mountain ; and 200, var. 



antillense, Jenman. 

 292. Hymenophyllum eucoides, Sw. Upper slopes of the mountain. 

 271. Trichomanes macilentum, Van den Bosch. Upper slopes of the mountain. Will 



have, I think, to be regarded as not more than a variety of T. Bcmcroftii, 

 198, 201, 349. Trichomanes pyxldiferum, L. Upper slopes of the mountain. 349 



represents the variety T. cavifolium, C. Mull. 

 99, 317. Trichomanes crisp um, Sw. The higher number from the upper slopes of the 



mountain, the lower from the neighbourhood of the encampment. 



119. Trichomanes rigidum, Sw. Neighbourhood of the encampment. 



120. Davallia Imrayana, Hook. Upper slopes of the mountain. 

 344. Lindsayana guianensis, Dryand. Upper slopes of the mountain. 



SECOND SERIES. — BOTANY, VOL. II. 2 X 



