ODONTOGLOSSURt. 229 



ing its lovely spikes of bloom freely when kept quite cool. 

 There are many varieties of this beautiful plant, some much 

 finer and larger than others, but I have seen but few bad 

 ones. The finest that has come under my notice flowered with 

 Mr. Pilcher, gardener to S. Rucker, Esq., Wandsworth, each 

 flower measuring upwards of three and a half inches in dia- 

 meter. It lasts in beauty a long time if the flowers are kept 

 free from damp ; it is the same with all white or light-coloured 

 flowers when placed in a cool-house. If they become damp 

 they soon get spotted, and so lose their beauty. It grows 

 at an altitude of 7,000 to 8,000 feet in Bogota. 



0. AlexandrcR guttatum. — This is a distinct and handsome 

 variety ; the flowers are large, pure white, sepals and petals 

 bearing a few spots of reddish-brown ; lip large, deep yellow 

 at the base, and there dotted with red, with a single large spot 

 in the centre of the lip. Native of New Grenada, 



O. AlexandrcB (jiganteum. — Pseudobulbs and leaves large 

 and robust; flower spike three feet high, branching, and 

 many-flowered; flowers large, white, spotted all over most 

 profusely with reddish brown. I saw a plant of this variety 

 last October in the collection of the late T. Dawson, Esq., 

 Glasgow ; it had three spikes of bloom, each upwards of 

 three feet high, much branched, and bearing over fifty superb 

 flowers. 



0. Alexandra; TriancB. — A superb variety; flowers large, 

 nearly three inches in diameter; sepals white, shaded with 

 rose, the upper one having a single large round spot in the 

 centre, while the lower ones have each three such spots, with 

 several smaller ones ; petals pure white, and much broader ; 

 lip with a large blotch of rose in the centre, barred and spotted 

 with the same colour. 



0. Alexandra WarnerL — Another magnificent form of this 

 beautiful species. It was named by Mr. Bateman when 



