JANUARY, 1913.] THE ORCHID REVIEW. 29° 
DENDROBIUMS.—Plants of these useful Orchids that have been rested in 
a house of comparatively cool temperature, and on which the flower buds are: 
well advanced, may now be placed in a slightly warmer house. A light 
position in the cool Intermediate house is suitable for them during their 
early stages, and later on a slightly higher temperature will do no harm. 
But there is great danger of these plants throwing the whole of their buds 
if placed in excessive warmth during bud formation, which should, there- 
fore, be avoided. Care should be taken in the application of water to the 
roots of plants that are in this condition, but they must not be allowed to 
suffer for want of it. 
UMS.—As soon as the growth of D. glumaceum and the 
variety validum reach a height of two or three inches they commence to 
push forth a number of roots, and if repotting is required this is a suitable 
time to perform the operation. They will succeed in the same compost as 
Cypripediums, and should be potted in the same manner. They delight in 
a fairly humid position in the Intermediate house, and the delicate perfume 
of the flowers of D. glumaceum makes its slender grass-like flower spikes. 
an acceptable ornament to our houses. . 
SPATHOGLOTTIS.—Such species as S. aurea, S. Lobbii, S. Fortunei, S. 
Vieillardii, S. Kimballiana, S. plicata, and the hybrids, S. aureo-Vieillardii 
and S. Colmanii, delight in the temperature of the warmest house when in 
full growth. These plants are often rested too severely, thereby causing a 
check, which, especially with S. Fortunei and S. Lobbii, may do irreparable 
harm. The plants should not be allowed to remain dry for any length of 
time, but have sufficient water to keep them plump and healthy. The 
hybrids, S. aureo-Vieillardii and S. Colmanii, are now pushing up their 
flower-spikes, and must be carefully watered, for with an excess of water 
there is a danger of the flower spikes damping off and the plants starting 
into premature growth. As the spikes get. long enough they should be 
carefully tied to neat stakes, otherwise there is a danger of their getting 
broken. When the plants commence to grow they may be repotted in a 
similar compost to that used for Cypripediums. They should not be potted 
too firmly, and be carefully watered until they become re-established. 
C@LOGYNE CRISTATA and its varieties are pushing up their flower spikes, 
and must have water whenever they become dry. After flowering they should 
be induced to rest. C. pandurata and other varieties, as they commence to 
grow, may be watered whenever they become dry. Those at rest must 
only have sufficient to prevent shrivelling, as many of the varieties will not 
flower unless they are subjected to a good rest. 
DecIpuous CALANTHES.—These useful Orchids, as they pass out of 
flower, should be placed in a safe position to rest, avoiding too low a 
temperature or much harm may accrue. 
