196 ORCHIDS. 
will enable us to regulate the treatment for Dendrobiums, 
so as to accord in a measure with what they get in a 
state of nature. 
Culture.—All the species grow upon trees or rocks in 
positions exposed to sunshine, so that under cultivation 
they require very little shading. For the tropical species 
the temperatures most suitable are as follow: 
MonTHs. NIGHT. Day. 
deg. deg. 
November to February... ... 55 60-65 
March to April fo AS 60-65 70-80 (with sun) 
May to August Peni aca 65-70 75-85 59 
September and October ser 60-65 70-80 . 
During the growing season the atmosphere should be 
kept saturated by frequently damping the paths, stages, 
&c.; and in very hot weather the plants may be dewed 
with a fine syringe in the morning at ten o’clock, and in 
the afternoon at about five o’clock. As the new pseudo- 
bulbs ripen, less water should be given; and when they 
are plump and full, the plants should be removed to a 
drier, airier house, and only sufficient water be given at 
the roots to prevent shrivelling. In winter, no water 
should be given to the deciduous species, but those with 
foliage upon them should be watered a little. 
The plants should be re-potted as soon as the new 
growth begins to push. Pots, pans, baskets, rafts, and 
blocks are used, the first two for such strong sorts as 
D. chrysanthum, D. chrysotoxum, D. fimbriatum, D. 
speciosum, &c.; baskets are preferred for the smaller and 
more delicate kinds, and rafts and blocks for those which 
do not like to have their roots confined. Grand specimens 
