ORCHIDACEiE. 



289 



introduced into cultivation ; it has very pretty purple flowers, 

 which appear in July. The soil should be peat, loam, and 

 sand. 



DISA. 



A genus, from the Cape of Good Hope, of very beautiful 

 Orchids, with the curious flowers either growing singly or 

 in long spikes. D. cornuta has a loose spike of blush-co- 

 loured flowers, often more than a foot long ; clirysostaclvya 

 has them of a golden colour ; grancliflora produces a large, 

 solitary flower of a brilliant scarlet colour ; other species 

 have purple, lilac, or blue flowers. They are said to be 

 difficult to keep in health, as they are bog plants, and yet 

 require considerable heat. Another Cape genus requiring 

 the same treatment is called Disperis, the flowers being 

 either crimson, lilac, or straw-coloured. 



OPHEYS. 



This genus contains many of those species the flowers of 

 which so greatly resemble insects ; and, as they are princi- 

 pally natives of England and the Continent, they may be 



YOL. II. v 



