ONCIDIUM. 253 



yellow, with a long purple callus, and some purplish veins 

 in the base of the lip. From the Organ Mountains. 



O. divaricatum. — A small but abundant-flowering species; 

 the flowers are produced on long branching spikes during the 

 summer months ; sepals and petals yellow, blotched and 

 barred with brown ; lip orange yellow, it continues in per- 

 fection a long time. This is a useful plant for all pur- 

 poses when well grown ; pot culture suits it best. Native 

 >)f Brazil. 



0. euxantliinum. — A plant having much the appearance 

 of 0. hifolium, and requiring similar treatment. The flowers 

 are numerous, of moderate size, and very showy ; sepals 

 and petals small greenish yellow, banded with brown ; lip 

 large, rich yellow ; it blooms during the autamn. Native of 

 Brazil. 



0. excavation. — A robust- growing plant, with light green 

 leaves and pseudobulbs ; it should be potted in good fibrous 

 peat, and placed in the cool-house ; the flower spike is long 

 and branched, and bears an immense quantity of its richly- 

 coloured flowers ; sepals and petals rich yellow, profusely 

 blotched with cinnamon brown ; lip also rich yellow, blotched 

 only on the crest. This is also known by the name of 

 0. aurosum. Native of Peru. 



0. excavatum Dawsoni. — This, though bearing some resem- 

 blance to 0. excavatum, is very much stronger and more 

 robust in all its parts. The branching spikes are five feet 

 long, upon which its lovely large bright yellow and rich brown 

 flowers are borne in great profusion. I had the pleasure of 

 seeing a specimen of this splendid variety in bloom with the 

 late T. Dawson, Esq., Meadow Bank, each spike five feet 

 high, bearing upwards of a hundred flowers ; it was truly a 

 noble object. 



. flexiiosum . — A good old species from Brazil, producing 



