ORCHID TREATMENT DURING REST. Z7 



and between the hot-water pipes, so that it may become 

 warmed on entering the house. In the case of those plants 

 that come from the hotter parts of India, the temperature 

 should not be allowed to go below 60°. The BraziHan house, 

 which may also include all the species from the warmer parts 

 of Mexico, should range from 50° to 55° by night, and from 

 55° to 60° by day ; this should not be allowed to go below 

 50° at night. The New Grenadan, or cool-house, should not 

 be allowed to get below about 45° at night. 



Rest is induced by lowering the temperature, and with- 

 holding water. During this period the plants should only 

 receive suflScient water to keep them from shrivelling. There 

 are, however, some that will grow during the winter months, 

 amongst which may be enumerated many species of A'erides, 

 Vanda, Saccolabium, Phalanopsis, Zygopetalum, and similar 

 genera. These will require water at the roots to keep them 

 increasing, but care should be taken not to wet the young 

 shoots, for if they get wet they are very apt to rot. Those 

 that are growing should be placed at the warmest end of the 

 respective houses, giving all the light possible. 



Some Orchids are deciduous, losing their leaves after they 

 have finished their growth. To this class belong the species 

 of Cijrtopodium, Barkeria, Cycnoclies, Thuiiia alba, T. Ben- 

 sonicE, and T. Marshalliana , some of the Dendrobiums and 

 Calanthes, with Plcione maculata, P. Wallichiana, P. 

 lagenaria, and many others. These should be always so 

 placed that they may have as much light and sun during 

 their season of rest as possible. This is the only way to 

 ripen their pseudobulbs, which causes them to grow stronger, 

 and to flower more freely. When at rest the previously 

 named kinds require but very little water, but when those 

 without pseudobulbs like Vanda, Angracum, A'erides, Sacco- 

 labium, and Phalanopsis are at rest, they should never be 



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