Lissochilus.] cxxxiii. ORCHiDEiE (rolfe). 73 



Disc of lip one-keeled above the 



middle . . . . 58. i. Krehsii. 

 Expanded flowers 1 in. diam. 

 Disc of lip with 3-5 obscurely 



crenulate keels . . 59. L. Rueppellii. 



Disc of lip with 1-3 thickened 



keels .... 60. L. shirensin. 

 Spur about 1 lin. long, less than a 

 fourth »8 long as the side lobes. 

 Side lobes of lip 3 lin. broad j 

 front lobe scarcely convex 



near the base . . .61. L. ruaoenzoriensis. 

 Side lobes of lip 2 lin. broad ; 

 front lobe very convex near 

 the base. 

 Sepals acute . • . 62. L. oliverianvs. 

 Sepals obtuse . . . 63. L. Kirkii. 



Jl Expanded flowers f in. diam. . . 64. L. micranthu.<f. 



Spur reflexed at the apex . , . 65. 1>. Stuhlmanni. 



ttSepals about half as long as the petals. 

 Spur under 3 lin. long. 



Lip pandurate-oblongor obscurely trilobed. 

 Lip 6-7 lin. long; disc scarcely gib- 

 bous. 

 Front lobe of lip obtuse. 

 Leaves ^-1 in. broad. 



Front lobe of lip half as broad as 

 the petals. 

 Disc of lip with 9 thick keels 66. L. calopterua. 

 Disc of lip with 5-7 smooth 

 keels .... 

 Front lobe of lip not half as 

 broad as the petals . 

 Leaves 3-5 lin. broad . 

 Front lobe of lip acute or sub- 

 acute. 

 Front lobe of lip oblong, with 



many keels 

 Front lobe of lip ligulatc, with 

 5 lamellae .... 

 Lip 8-11 lin. longj disc distinctly gib- 

 bous . . . 

 Lip distinctly trilobed. 



Side lobes of lip 2 lin. long 

 Side lobes of lip 3 lin. long 

 Spur 3 lin. or more long. 



Side lobes of lip under 2 lin. long. 



Gibbosity of front lobe of lip regularly 



curved (Angolan species) 

 Gibbosity of front lobe of lip very ob- 

 lique (Zambesi species) 

 Side lobes of lip 3 lin. or more long. 

 Sepals acute. 



Front lobe of lip very strongly gib- 

 bous. 



