LIST OF COOL ORCHIDS. 113 



0. roseum (Lindley, Loxa). — This is but little known at pre- 

 sent, although one of the oldest and prettiest of the entire 

 group. Messrs. Backhouse and Sons, of York, have been 

 fortunate enouf^h to introduce it within the last few years. 

 Pseudo-bulbs ovoid, two-leaved ; leaves ob-lanceolate, about a 

 foot long; spike arched or drooping, from ten to twenty- 

 flowered ; flowers about an inch across, and of a uniform deep 

 rosy-crimson colour, the apex of the column only being white. 

 It is very distinct, and should be more cultivated, on account 

 of its colour. Flowers in April, lasting a month. 



0. Rossii, — A beautiful Mexican species, of dwarf habit. 

 Pseudo-bulbs angular, rather larger than those of 0. citros- 

 mum, which it resembles in habit ; scapes from one to three- 

 flowered ; flowers from one to two inches across ; sepals 

 lanceolate, about an inch long, white, banned with brown trans- 

 versely ; petals sub-hastate, much broader than the sepals, pure 

 white, with a few spots at their bases only; lip oblong or cor- 

 date, pure white, with a lemon-yellow bilobed crest : column 

 white. A delicate, free-flowering plant, blooming during the 

 winter, and lasting from three to four weeks. It is a native of 

 Mexico. 



a. 0. Bossii sui:>erhum. — This select variety is a better form, 

 having larger flowers than the typical species. Its flowers are 

 from two to three inches across, barred with crimson, very 

 distinct and effective. 



h. O.Eossii Warnerianum. — This is another fine form, having 

 pseudo-bulbs two inches high ; flowers from three to five, on a 

 scape longer than the leaves, two to three inches across, with 

 broad segments ; sepals and petals pure white, barred and 

 blotched with purple at the base ; lip cordate, crenate, white, 

 with a golden crest. 



*0. Schliej^erianiim (New Granada). — In habit this resem- 

 bles 0. grande ; but it flowers in June and July, lasting a long 



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