683 
COSTUS afer; a: glaber. 
Smooth Sierra Leong Costus. 
MONANDRIA MONOGYNIA. 
Nat. ord, SCITAMINER. : Brown prod. 1. 905. 
COSTUS. Supra fol. 665. 
C. afer, foliis 5 elongatis, spicá turbinaté eoaretatä, bracteis her- 
'Aceis muticis obtusis, calyce brevè tridentato dentibus berbaceis muti- 
cis; filamenti dorso glabro. i 
(«) glaber. foliis utrinque viridibus ocreisque lzyibus. 
(£) pubescens, foliis utrinque viridibus subtüs vaginisque hirt? villosis ; vagi- 
narum Ocreá fimbriatä. 
Caules. pedales v. ultra, erecti, vaginati. Fol. laz2 sparsa, patentia, 
lanceolata, aristato-acuminata, utrinque viridia: petiolus brevis abusus 
vagina viridi infra ocream insertus. Spica terminalis, sessilis, iflora, 
arctissimè obovata, foliis in bracteas decrescentibus vallata: flores & itnatí : 
bracteæ virentes, mutice, obtuse, exteriores late, calyei equales Cal. mem- 
branaceus, infundibuliformis, semunciä longior, brevissimé trifidus lolmiis 
herbaceis oblatis acuminatis, muticis. Cor. candida, sesquiumcid altior ;. 
tubus communis brevissimus flavus cuneatus; limbus exterior tenuis, subeyna- 
lis, nitidus, interiore I v. eirchter brevior, laciniis elongato-0blongis, lineas 
3 v. circitèr latis, parüm inaequalibus (2 anticis reflexis? ich erectá? ) 
limbus interior opacus, unilateralis, anticus, lato-cuneatus, uxilabiato-convolu- 
tus, infernè longior erectus, supernè brevior recurvus rugatusque, margine labri 
eroso-denticulatus, disco incrassatus aredque flavä villosá filamento respon- 
dente et sulco verticali bisectá notatus. Fil. petaloideum, album, utrinque 
glabrum, elongato-oblongum, brevè acuminatum, limbum exteriorem nS, 
basi flavescens et cum limbo interiore in tubulum brevem intüs flavo-barbatum 
concretum: anthera verticalis, adnata, infrà m acuminis filamenti 
intramarginalis, oblonga, albida: pollen ochroleucum. Stig. album, trans- 
versum, lunatum arcús superni cornubus deflexis, bilamellosum lamellis 
transvers? parallelis equalibus corformibus conniventibus ciliolatis, à tergo 
infernè convexum et gibbo erecto bidentato (dentibus staminum lateralium 
rudimentis?) onustum. 
— — 
An unpublished species, introduced last summer from 
Sierra Leone, by Mr. George Don, collector for the 
Hortiegltural Society. Plants of it flowered shortly after 
their arriva] in one of the hothouses in the new garden of 
the Society. Samples from the same country had been long 
ago deposited in the Banksian Herbarium, in Mr. Brown's 
Library, by the late Dr. Afzelius, as well as in Mr. Lam- 
bert's Herbarium. 
vor, VIII. AA 
