Costus. 385 



A Spica erecta, folia retrorsum scabra 

 oblongo-lanceolata. 

 X Galyx G mm longus, folia subfalcata ; 



Guiana 5 1 . C scaberulus. 



XX Calyx 9 — 10 mm longus, folia ob- 



longo-obovata vel obovata; Peru . 52. G. scaber. 

 /\/\, Spica nutans folia sursum scabra . . 53. C. nutans. 

 B. Caulis foliiger a florente discretus; species scaposae. 



a. Caulis floriger apice foliis paucis rosulatim dispositis instruc- 

 tus, folia abbreviata et latiora quam in caule foliigero (C. 

 maeulatus Roscoe interdum apice folium parvum unum 

 alterumve portal). 



a. Stirps gigantea robustissima ad 8 m alta, folia ad 60 cm 



longa, labellum fimbriatum 54. G. giganteus. 



ß. Stirpes duplo et ultra breviores minus robustae, folia vix 

 unquam ultra 25 cm longa, labellum undulatum nee fim- 

 briatum. 



I, Planta glabra ob. G.megalobractea. 



II. Planta hirsuta 56. C. Dinklagei. 



b. Caulis floriger typice scaposus aphyllus i. e. vaginis tantum 

 vestitus. 



a. Spica parva subglobosa depressa vix 2 cm diametro, 

 stirpes tenues. 



I. Caulis foliiger basi luteo-maculatus plurifoliatus, brac- 



teae apice obtusae; Africa 57. C maeulatus. 



II. Caulis foliiger basi haud maeulatus pauci-(4-)foliatus, 



bracteae exteriores apice calloso-pungentes; Malacca . 58. G. oligophyllus. 

 ß. Spica major oviformis vel ellipsoidea. 

 I. Bracteae obtusae haud pungentes. 



\ . Bracteae infra apicem haud manifeste calloso-lineatae 

 nee impressae. 



* Vaginae scapi imbricatim sese obtegentes ; Africa. 

 f Folia ampla ultra 25 cm longa, subtus scabra 



at haud manifeste induta, ligula alta . . . 59. C. trachyphyllus. 

 ff Folia minora vix unquam 20 cm longa subtus 



aureo-sericea 60. C. dubius. 



** Vaginae scapi inter se remotae, sese haud ob- 

 tegentes 61. C. Zechii. 



2. Bracteae infra apicem calloso-lineatae, folia amphs- 



sima; Ecuador 62. C geotkyrsus. 



3. Bracteae infra apicem impressae, folia multo minora; 



Peru 62^^. G. eryfhrocoryne. 



II. Bracteae et lobi calycis apice calloso-indurati acuti; 

 India orientalis. 



1 . Folia utrinque glabra ubi nota, bracteae et calyces 

 longe pungenti-mucronati, spica globosa. 



* Spica maxima 7 cm diametro et ultra globosa. 



f Bracteae et calyces aureo-hispidi 63.G.chrysoeephalus. 



ff Bracteae et calyces glabri vel puberuli haud 

 aurei. 



(3 Bracteae appendicuHs instructae, flores rubri 64. G. Bidleyi. 

 QQ Bracteae exappendiculatae, flores flavi. 



/\ Bracteae calycesque papillosi scabri, 

 priores 3,5 — 4 cm longae, laxiores, 



A. Engler, Das Pflanzenreicli. IV. 46. 25 



