DECEMBER, 1923.] THE ORCHID REVIEW. 365 
lowering the temperatures or chilling the plants. Air is best admitted 
through the bottom ventilators, which should be arranged so that it 
becomes warmed,.somewhat by: passing. over the hot-water pipes. The 
ventilators on the side sheltered from the wind should be opened first, and, 
as the temperatures in the houses rise, those on the other side may be 
opened a little to cause the air to circulate among the plants. Orchids now 
in bloom are various forms of Dendrobium Phalenopsis, the colour of the 
flowers ranging from pure-white to rich crimson-purple. If these plants are 
placed in a Cattleya house while in bloom they will last in good condition 
for quite a long period. After the spikes are cut, place the plants in a 
house where the temperature does not fall below 60°, in a position well 
exposed to the sun’s rays. When their growths are well matured, very little 
water will be needed during the long season of rest, afford them just 
sufficient to prevent the pseudo-bulbs from shrivelling. 
PHAL#Nopsis.—Plants of Phalaenopsis amabilis, P. Schilleriana, P. 
Sanderiana, and others of this genus are developing their flower spikes. 
These plants should be watered with great care during the winter, as an 
excess of moisture at the roots may set up decay in the leaves. The 
plants should be examined each morning, and if the sphagnum moss 
is dry it should be lightly sprinkled, as soon as the temperature rises above 
65°. At the same time damp the sides of the receptacles and the roots that 
are clinging to them with tepid rain water. The flower spikes should not 
be allowed to remain on for any length of time after the flowers are developed 
or the plants will be weakened and permanently injured. The plants should 
be afforded a light position, but not exposed to direct sunshine. 
CALANTHES.—Plants of the early flowering varieties of Calanthes, such 
as the C. vestita section, are developing flower spikes. After a few of the 
blooms are expanded, the plants may be removed from their warm growing 
quarters to the Cattleya house, where the flowers will last in good condition 
for a considerable time; as cut blooms they will not fade so quickly as 
when brought from a close, moist atmosphere. The plants will require but 
very little water, as they should be afforded a thorough season of rest after 
the inflorescences are cut by being placed in a dry position, near to the roof- 
glass, in a temperature that does not fall below 60°. If space is limited the 
bulbs may be removed from the pots, the soil shaken from the roots, and 
stored in boxes, placing silver sand around the bases, but it is preferable to 
leave them in the pots, as they then start more freely into growth in the 
spring. 
MitontAs.—Plants of Miltonia vexillaria, M. Bleuana and their many 
hybrids are growing freely, and the roots are very active; they should be 
afforded enough water to keep the sphagnum moss on the surface in a fresh 
growing state, and be placed in a light position in.an intermediate tempera- 
