THE ORCHID GENERA 1.15 



Tetramica 



This genus is commonly known as Leptotes. The 

 only variety known to me is T. bicolor, a native of Brazil. 

 The plant should be grown upon a block suspended 

 near the glass of the Cattleya house, a liberal supply of 

 water being needful when growing. The flowers are 

 small but very pretty, the sepals and petals white, lip 

 purple, sometimes margined or shaded with white. 



Thunia 



A small genus, those at present known being con- 

 fined to North India, Assam, and Burmah. The species 

 most generally cultivated are T. alba y T. Bensonia, T. 

 Marshalii, T. Brymeriana, T. pulchra, T. candidissima, and 

 the distinct hybrid T. Veitchii. Thunias should be re- 

 potted annually as directed for Calanthes, and water 

 afforded on the same principle. Grow the plants on 

 the sunny side of the East Indian house. The flowers 

 appear on the apex of the new growth, and, immediately 

 they fade, the plants should be placed in more sun- 

 light, and afforded water until the leaves change colour, 

 when it should be gradually discontinued, and the plants 

 removed to a cooler and drier atmosphere. 



Trichopilia 



Plants of this genus are found on the Andes of South 

 America, at moderate elevations, and northwards as 

 far as Mexico. The greater number of the known 

 species possess large, showy flowers, and the following 

 are worthy of culture : — T. brevis, T. Galeottiana, T. 

 marginata, T. suavis, and T. coccinea, with its several 



