288 PROF. OLIVER ON NEW PLANTS FROM RORAIMA. 



rigida. Spiculae masculse singular, copiosse, § unciam longoe, castanese, inferiores pedun- 

 culatse. Gluinse 3 vacuse, staminiferae 6, lanceolatae aristatae, marginibus parce ciliatis, 

 arista brevis crassiuscula. Stamina in flore circiter 6. Anthera acuminata fila- 

 mento aequalis, \ unciam longa, apiculus brevissimus, tricbomatum fasciculo terminali 

 brevi. Spiculae feminese parvae angustse. Glumae vacuae 4, suprema fertilis, exteriores 

 cartilagineae lanceolatae brevi-aristatae, castanese, interiores scariosse, carina violacea. 

 Stylus stigmati aequalis, teres, crassiusculus brevis. Stigma breviter bifidum lobis 

 lanceolatis obtusis planis, violaceis. Ovarium ellipticum oblongum obtuse trique- 

 trum breviter pedicellatum, pedicello subtereti. Seta? hypogynae, copiosae, tortae. 

 Pistillum ^-unciale ; caryopsis fere ^ unciam longa. 

 Ledge, Roraima. 



Tbis genus is most nearly allied to Lagenocar+ms, but differs entirely from that genus, 

 and from the rest of the Cryptcmgieai, in the lateral inflorescence, the bifid stigma, with 

 short flat lobes, the absence of any cupule, and the presence of a large number of hypo- 

 gynous bristles. 



262. Paspaltjm stellatum, Fliigge, var. ? 



261. Panictjm nervosum, Lam. ? 5400 ft. 



254. Arundinella brasiliensis, Eaddi. 5400 ft. 



154. Echinol^na scabra, H. B. K. 5400 ft. 



246. Saccharum (§ Eriochrysis) catennensis, Beauv. 5400 ft. 



260. Isch^mum latifolium, Kuntb. 5400 ft. 



359. ? GtiADUA (barren). 5400 ft. 



18. ? Chusquea (barren). Arapoo B,. 

 302. Gram. dub. (barren). Top. 



FEBNS. By J. G. Baker, E.R.S., F.L.S. 



The following is a complete list of the Ferns collected. The numbers are Mr. im 

 Thurn's collecting-numbers. Those enclosed within brackets indicate the position of 

 the new species in the sequence followed in our ' Synopsis Filicum.' In determining the 

 species I have had the kind help of Mr. Jenman, the government botanist of the colony, 

 who has paid special attention to Ferns ever since he has lived in Demerara. 



343. Gleichenia pubescens, H. B. K., var. (G. longipinnata, Hook.). Upper slopes of 



the mountain. 

 92. Cyathea vestita, Mart. In the neighbourhood of the encampment. 

 270. Alsophila bipinnatifeda, Baker. With a slender caudex 6 or 7 feet in length, in 



the neighbourhood of the encanipmeut. 



87 (16*). Alsophila macrosora, Baker, n. sp. ; stipitibus basi paleis linearibus brunneis 

 imbricatis dense vestitis, frondibus amplis deltoideis tripinnatifidis crassiusculis 



