OF THE CAMEROONS MOUNTAINS, ETC. 227. 
Folia 11-2 unc. longa, 1-3 lata, plana, membranacea, viridia, margi- 
nibus non ciliatis, nervis primariis ad 7 a secundariis perplurimis vix 
distincta, nervulis paucis transversis trabeculatis, paginis laevibus. 
Panicula 2-3-pollicaris, laxa, ramis solitariis }-1-pollicaribus apices 
versus 1-2-floris ; rhachi ramisque filiformibus levibus. Spicule pedi- 
cellate, z une. longe, glaberrime. Valvula exterior brevis, late 
ovata, apice rotundata ; secunda et tertia consimiles, concave, oblong, 
obtusz, loves, 5-nerves; 2 intimæ cymbiformes, coriacez, obtuse, leves. 
Similar in habit, &c. to P. aerotrichum, but at once distinguished 
by the glabrous leaves, fewer-flowered panicle, its solitary branches, 
and the glabrous, blunt, 5-nerved glumes, which are not ribbed. 
4. Panicum (MILIARIA) PUSILLUM, H.f.,n.sp. Molliter.laxe vil- 
losum, parvulum, debile, culmis decumbentibus filiformibus foliosis, 
foliis parvis lanceolatis, panicula laxa ovata ramosa, ramis deflexis 3-4- 
floris, ramis ramulisque flexuosis, valvulis 3 spicule costatis longe se- 
tosis. 
Hab. Cameroons Mountains, alt. 7000-8000 feet. (Fl. Dec.) 
Debile, annuum, pusillum, totum pilis mollibus patentibus elongatis laxe 
villosulum, culmis decumbentibus laxe foliosis fere capillaribus 2-3-pol- 
licaribus, nodis non barbatis. Vagine 1 unc.longz, laxe, costate. Folia 
1-i unc. longa, anguste lanceolata, acuminata, plana, multicostata, 
utrinque villosula. Panicula pollicaris, erecta, ramis solitariis brevibus 
capillaribus. Spicule vix j,; unc. longe. Valvule 3 exteriores sub- 
zquales, membranaceze, virides, ovate, acute, longe pilose, pilis basi 
tuberculatis ; exterior 3-costata, paulo minor; 2 sequentes 5-costate, 
costis acutis; 2 intime cymbiformes, coriacez, glaberrime, leves, 
subacutz. 
A very remarkable little species, quite unlike any with which I 
am acquainted; its habit is that of Isachne dispar. 
5. IsAcHNE REFRACTA, H. f.,n.sp. Fere glaberrima, culmis basi ge- 
niculatis decumbentibus demum erectis gracilibus strictis levibus, va- 
ginis lævibus sulcatis versus margines pilosulis, foliis refractis anguste 
lanceolatis longe acuminatis strictis scabrulis marginibus incurvis, 
panicula effusa, ramis strictis hic illic longe pilosis, valvulis ovatis 
subacutis valide costatis. 
Hab. Cameroons Mountains, alt. /000 feet. (Fl. Dec.) 
Gramen rigidulum, perenne, 3-unc. ad pedale, culmis caespitosis basi 
decumbentibus ramosis. Folia stricta, 1-2 unc. longa, omnia deflexa. 
Culmi superne gracillimi, levissimi. Panicula 1-3-pollicaris, late ovata, 
fere æque lata, ramis alternis capillaribus flexuosis ramulis 1-4-floribus. 
Spicule pedicellatz, +; unc. longs, purpurez, ovate, subacute. Val- 
vule glabre, exterior minor ovato-oblonga acuta 3-costata, 2 sequentes 
subsequales 5-costatz; flosculus inferior (interdum neuter v. imper- 
