MOUNT ROKAIMA IX BRITISH GUIANA. 71 



I'.Kiui.Aviin s STJ3CAULESCENS, X. E. Brown, sp. n. Plants 4-8 poll. alta. Caulis 

 simplex, dense toliosus. Folia lineari-lanceolatu. acuta, glabra, juniora pilis lougis 

 laxe ciliata. Pedunculi 2-7-aggregati, obtuse 4-angulati, glabri, vaginis oblique fissis 

 apice siiliulato-apieiilatis glabris ore ciliatis. Capitula hemisphserica, albo-villosa. 

 Bractese involucrantes suborbiculares vel Late oho vatse, obtusissimse, minutee ciliata-. 

 fuscae. Bracteae inter flores oblongae, obtusse, apiculatae, apice albo-barbatae. 

 Receptaculum glabrum, sed pedicellis laxe pilosis. Floris masculi sepala obovata, 

 ohtusa, apice albo-barbata ; petala in tubum tridentatum longe stipitatum connata. 

 Floris foeminei sepala elliptica vel obovata, obtusa, apice albo-barbata; petala 

 libera, oblonga, obtusa, pilis longis dense ciliata, dorso glabra. 

 A perennial, with a simple densely leafy stem J-2^ in. long. Leaves f-1^ in. long, 

 1-2^ lin. broad, linear-lanceolate, acute, glabrous, striate, green, the younger laxly ciliate 

 with long white hairs, ascending, becoming deflexed with age. Peduncles 2-7 to a plant, 

 2^-5 k in. long, slender, obtusely 1-angled, glabrous ; their basal sheaths 1-1} in. long, 

 glabrous, with an oblique ciliate mouth, acute or subulate-pointed. Heads 2-3 lin. diam.. 

 hemispherical, monoecious, white-villous. Involucral bracts in 3-1 series ; the innermost 

 f lin. long, f-1 lin. broad, suborbicular or broadly obovate, very obtuse, glabrous, minutely 

 ciliate, fuscous, the outer gradually smaller. Flowering bracts f-1 lin. long, £ lin. broad, 

 oblong, obtuse, apiculate, fuscous, densely bearded with short white hairs on the apical 

 part. Receptacle apparently glabrous, but with the base of the pedicels pilose with Ion" 

 hairs. Male flowers: sepals f lin. long, ^ lin. broad, obovate, obtuse, brown, bearded 

 with white hairs at the apex ; petals connate into a hyaline, subtruncate, minutely 

 3-toothed tube, separated from the sepals by a stipes nearly ^ lin. long, glabrous ; anthers 

 white. Female flowers : sepals f-1 lin. long, nearly i lin. broad, elliptic or obovate, 

 obtuse, fuscous or brownish, densely bearded with short white hairs on the apical part ; 

 petals 3, free, arising close to the sepals, f lin. long, ^ lin. broad, oblong, obtuse, light 

 fuscous, densely fringed with very long hairs on the margins and borders of the inner 

 face, glabrous on the back; ovary glabrous, trigonous ; style elongated ; stigmas linear, 

 bifid to halfway down ; appendages rather thick, papillate at the apex. 



Kotinga Valley, McConnell 8f Quelch, 153. Savannahs generally, McConnell fy Quelch, 

 300. 



A very distinct species, bearing a resemblance to P. uncmatus, Gardn., in stem and 

 foliage, but with very different flower-heads. It might be placed near P. plantagmeus, 

 Koern. 



P.EPALANTHUS BIFO&MIS, X. E. Brown, sp. n. Planta pusilla, acaulis, ut videtur annua. 

 Folia rosulata, 3-1 lin. longa, linearia, acuta, supra arachnoideo-tomentosa, demum 

 glabra. Pedunculi 3-1, tiliformes, lf-2| poll, longi, laxe villosi vel subglabri, vaginis 

 glabris ore obliquis acutis. Capitula hemisphaerica, 2-2| lin. diam., pallide luteo- 

 alba. Bractese involucrantes oblongre vel ovato-oblongic, acuta?, glabrae. Bracteae 

 inter flores nulhe. Receptaculum et pedicelli lanati. Flores masculi quam fceminei 

 multo minores, oblique deltoidei, acuti, sepalis inasqualibus ad medium barbatis, 

 petalis in tubum minutum stipitatum connatis. Flores foeminei recti; sepala 



