I'ROF. OLIVER ON NEW PLANTS FROM RORAIMA. 293 



Allied to the Brazilian J?, achilleafolium, Kaulf., but quite different in texture, in the 

 shape of the segments, and by its very short simple veins. Pound in the neighbourhood 

 of the encampment. 



172. Polypodium (§ Goniophlebium) loriceum, Linn. Base of the great cliff. 



340. Polypodium (§ Pulebodium) auueum, Linn., var. (P. areolatum, II. B. K.). In the 



neighbourhood of the encampment. 

 208. Polypodium (§ Campyloneuron) angustieolium, Sw., var. (P. ampuostemon, 



Kunze). In the neighbourhood of the encampment. 



295 (II*). Gymnogramme (§ Pterozonium) cyclophylla, n. sp. (Plate LIII. figs. 1, 2) ; 

 caudice erecto, stipitibus ca^spitosis elongatis erectis basi primum paleis minutis 

 lineari-subulatis patulis preeditis, frondibus parvis nitidis rigide coriaceis apice 

 rotundatis margine recurvato basi cuncatis margine piano, venis flabcllatis 

 immersis, soris oblongis ad venarum apicem solum productis cite confiuentibus 

 zonam angustam intramarginalem formantibus. 

 Stipes wiry, 5-6 in. long. Lamina only about an inch long and broad. Found on 



the summit of the mountain. 



101, 215 (14*). Gymnogramme (§ Pterozonium) elaphoglossoides, n. sp. (Plate LIV. 



figs. 1-5) ; caudice valido lignoso paleis parvis subulatis nigro-castaneis dense 



vestito, stipitibus elongatis erectis nudis castaneis, frondibus simplicibus integris 



rigide coriaceis nudis elliptico-lanceolatis acutis vel obtusis conspicue costatis basi 



cordatis, venis confertis patulis parallelis simplicibus vel furcatis intra marginem 



evanescentibus, soris linearibus cite confiuentibus frondis faciem totam inferiorem 



proeter zonam angustam marginalem occupantibus. 



Stipes wiry, sometimes above half a foot long. Fronds G-8 in. long, fertile 1-2 inches, 



sterile sometimes 3 inches broad. Sori occupying the whole under surface except a 



marginal border. Not more than ^~tV in. broad. Found both upon the upper slopes 



of the mountain and in the neighbourhood of the encampment. 



These two interesting novelties both fall under the genus Pterozonium of Fee, figured 

 on tab. 16 of his ' Genera Filicum.' The only species known previously is the very rare 

 Gymnogramme reniformis, Mart., figured Icon. Crypt. Bras. t. 26, and also in Hooker's 

 ' Second Century of Ferns,' t. 9, and on tab. 49 of the Fern volume of ' Flora Bras- 

 iliensis.' The two new species are very distinct, both from one another and G. reniformis. 

 In G. cyclophylla the sori form a narrow band just within the margin ; in G. reniformis 

 a broad semicircle, a distinct space within the margin, whilst in G. elaphoglossoides they 

 cover the whole surface except a narrow border. 



164. Gymnogramme Schomburgkiana, Kunze. Upper slopes of the mountain. 

 197. Gymnogramme hirta, Desv. Upper slopes of the mountain. New to Guiana. 

 159. Gymnogramme flexuosa, Desv. Upper slopes of the mountain. Also new to 

 Guiana. 



