192 THE ORCHID REVIEW. [Nov.-DEc., 1919. 
affording only sufficient water to prevent shrivelling. Give all the light 
possible, in a house having a warm intermediate temperature. V. 
Hookeriana and the hybrid V. Joaquimi# should remain in the Warm 
house until their growth is completed. V. Amesiana, Kimballiana, and 
Watsonii, whilst pushing their flower spikes, should have the compost 
kept moist, but the supply of water should be reduced as soon as the 
flowers expand, which will keep them a longer time in good condition. 
When their flowering season is over only sufficient water is needed to 
prevent shrivelling. These terete-leaved plants need a long rest, and are 
capable of withstanding considerable drought without injury. 
CyPRIPEDIUMS.—The winter-flowering section of these useful plants will 
be in full beauty, and where an up-to-date collection is grown will make a 
delightful display. The ease with which they can be grown, their floriferous- 
ness, and the lasting quality and beauty of their flowers, are all well known, 
and need no recommendation from me. Another advantage to those in or 
near large towns is that they suffer less from smoke and fog than almost any 
other Orchids. Cypripediumsare always in active growth, hence absolute 
dryness at the roots is injurious. During their flowering season the 
minimum amount of moisture at the roots is required, but, whenever the 
compost becomes dry the plants should be watered, care being taken that 
they become fairly dry between each application. A moist atmosphere 
must be maintained at all times, but care should be taken to prevent 
saturation when the temperature is low. During their flowering period a 
night temperature of about 60° F., with a slight rise during the day, will 
suffice. When the flowering period is passed any necessary potting may 
be undertaken, using a compost as previously advised. 
ODONTOGLOssuMS. —The species and hybrids of this genus that were 
potted in September will by now have filled their pots with roots, and may 
be afforded more liberal supplies of water. The usual precautions are 
necessary, especially at this season, against keeping the compost in a 
saturated condition. Efficient drainage is important, and it should always 
be remembered how readily water passes away from them in their native 
homes. Odontiodas are of a similar nature to Odontoglossums, and require 
the same treatment. 
CALANTHES.—As varieties of the vestita section pass out of flower, the 
plants should be placed in a dry position close to the roof of a Warm house, 
where the light will assist in maturing the pseudobulbs. Water must be 
’ withheld till after the plants are repotted in the spring. 
, ZYGOPETALUMS are now growing freely, and will require water whenever 
they become dry at the roots. The popular Z. Mackayi produces its flowers 
during the winter, and owing to their colour are most acceptable. These 
plants when in full growth require an abundant supply of water, and, as 
be 
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