38 PRESENT-DAY GARDENING 
WATERING TERRESTRIAL ORCHIDS 
These, like the epiphytal Orchids, may be divided into 
two main classes, namely, those which lose their leaves 
annually, and those which are more or less evergreen, 
Some of the genera contain both of these classes, and 
notably the Calanthes. In C. vestita, C. Regnieri, C. rosea, 
and their varieties and hybrids the leaves turn yellow 
after the growths are fully made up, a sign which gives 
a good indication as to the necessity for withholding water 
for a lengthened period; while Calanthe veratrifolia and 
others of the class retain the last-made foliage green all 
the year round, the loss of foliage being in the old leaves, 
which should be removed at the first sign of decay. 
With these latter may be classed the Phaius, Zygopetalums, 
Cymbidiums, Cypripediums, and many others of evergreen 
habit, which require much care to be exercised in the matter 
of withholding water during the resting season, other- 
wise the plants will decline in vigour. After the growths 
are finished, most of these plants are benefited by removal 
to a cooler and more freely ventilated house for a few 
weeks, during which time the supply of water should be- 
restricted, but they should never be allowed to suffer 
by being thoroughly dried. For Zygopetalums and other 
Orchids which it is customary to place in a rather drier 
atmosphere during the time they are in flower, such an 
interval would be sufficient rest, 
