68 THE BOOK OF ORCHIDS 



deal must be left to the judgment of the cultivator. 

 When the new growths commence to root, water should 

 at first be given in small quantities and, when the roots 

 have obtained a firm hold of the compost, they must be 

 liberally supplied with water till they have completed 

 their growths, after which time the supply should be 

 gradually diminished in quantity. When the plants 

 are at rest, only a very small amount is needed to 

 preserve the plumpness of the newly-formed pseudo 

 bulbs. Plenty of heat and moisture is essential when 

 growing, reasonable exposure to light and air being 

 given to mature the growths. During winter, a cooler 

 and drier atmosphere is necessary. With the exception 

 of D. Brymerianum, D. Dearei, and D. Falconeri giganteum, 

 which require a Cattleya house temperature, all of the 

 Dendrobiums mentioned should be grown in the East 

 Indian house. Such of the nigro-hirsute section as D. 

 formosum, Z). Lowii, and D. Jerdonianum y prefer the 

 hottest division ; others, as D. longicornu, D. Wattianum, 

 Z). infutidibulon , and its variety Jamesianum, do best in 

 a cool, intermediate temperature. A few Australian 

 Dendrobes, as D. Kingianum, D. speciosum, D. lingueforme \ 

 and Z). teretetifolium, thrive well in the cool house. The 

 following distinct and little known species are very 

 curious and interesting, and well worth adding to the 

 collection : D. amplwn, D. coelogyne, D. cymhidioides , and 

 D. Treacherianum, all of which do well if suspended in 

 a shady position in the Cattleya house. Besides the 

 species of Dendrobiums named, a considerable number 

 of beautiful garden hybrids have been introduced into 

 cultivation, which have a special interest to horticulturists 

 generally. 



Epidendrum 



This genus has a wide geographical distribution, 

 scattered over nearly the whole of South America, 



