59 
bus, sepalis lateralibus lineari-lanceolatis dorsali peta- 
lisque lanceolatis, labello unguiculato obovato cordato 
apiculato lineis duabus elevatis in unguem, columnæ 
brevis semiteretis alis angustis decurvis serrulatis. —— 
Peru.——A terrestrial plant. Flowers yellow, whole- 
coloured, with a very long narrow stalk to the lip. 
38. O. bicolor (Lindl. in Benth. Pl. Hartweg, Jan. 1845. 
ined.); foliis lanceolatis scapo simplici paucifloro flex- 
uoso subæqualibus, sepalis petalisque ovatis acutis 
subundulatis æqualibus, labello unguiculato obovato 
apiculato basi obtuso, denticulis quibusdam (sex) in 
unguem, columnæ brevis alis decurvis serratis.——- 
Peru.——Only known from a drawing by Mathews, in 
Sir Wm. Hooker’s Herbarium. The flowers are large, 
bright violet, with a great whole-coloured yellow lip. 
* * Species concerning which there is no sufficient information. 
a 39. O. erosum (Ach. Richard in Ann. Sc. Jan. 1845); 
** pseudobulbo ovoideo oblongo 1-phyllo ; fol. lanceolatis 
acutis ; scapo 1-floro ; sepalis luteis: labello lilacino late . 
ovali margine eroso-denticulato." — — Mexico. 
40. O. Ghiesbreghtianum (Ach. Richard in Ann. Sc. Jan. 
1845); '**pseudobulbis ovoideis compressis 3-phyllis ; 
scapo pedali 3-6-floro; flor. luteis brunneo-maculatis : 
labello luteo, longe unguiculato, transverse orbiculari, 
emarginato, sepalis duplo longiori, ungue lineari basi 
hinc et illinc obtuse auriculato, superne bi-cristato.” 
Mexico.—— 
61. CLEISOSTOMA discolor. 
C. discolor ; foliis oblongis canaliculatis oblique truncatis, racemo paniculato, 
labello trifido utrinque plicato lobo medio carnoso obtuso, intus bituber- 
culato dente dorsali indiviso carinato, calcare oblongo obtuso. 
A little inconspicuous plant obtained from India by 
Messrs. Loddiges. The flowering stem is long, slender, dull 
purple, and branched at the extremity. The sepals and 
petals are dull yellow, with a green tinge, the spur is nearly 
white. 
