108 THE ORCHID REVIEW. (APRIL, I9gI5. 
Fast Indian house, immediately the sun has sufficient power to raise the 
temperature six or seven degrees, the blinds should be lowered. The 
‘Cattleyas will nct require shading quite so soon, but when the sunshine is 
bright and continuous, the sun being strong enough to overheat the foliage 
of the plants, the plants should be shaded. This may be judged when the 
leaves begin to feel warm to the touch. The blinds should be run down on 
the Odontoglossums and Masdevallias immediately the sun, on bright 
mornings, has raised the inside temperature to 55°, and it should be kept 
down so long as the sun shines upon the plants. Where the side lights or 
ends of houses allow the sun to play upon the plants or their pots, they 
should be covered outside with some thin material, or the glass may be 
thinly stippled. 
In the East Indian house, where there is a great number of distinct 
Species from both hemispheres, and from many different altitudes, it is 
‘sometimes very difficult to find suitable positions for the plants, some 
requiring plenty of light, and others a warm, shady corner. Those species 
that need extra light at all times include Thunia, Dendrobium, Catasetum, 
‘Cycnoches, Mormodes, Cyrtopodium, Arundina, Grammatophyllum, Ipsea, 
Lelia acuminata, Schomburgkia, Lissochilus, Renanthera coccinea, the 
terete-leaved Vandas, &c., while those that need shade are Phalenopsis, 
Saccolabium, Aérides, Angrecum, Renanthera Lowii, Cypripedium, 
Cirrhopetalum, Bulbophyllum, &c. As previously mentioned, to suit in 
the matter of shading, ventilation, temperature, atmospheric moisture, &c., 
of so many species and varieties in one house is a matter of considerable 
difficulty, but a great measure of success can be attained by careful study, 
and by selecting special positions for certain plants. Much information 
can also be gained by visiting other collections, and noting well the 
positions the best grown plants occupy. The inmates of the Mexican 
division, as Lelia anceps, L. autumnalis, L. Gouldiana, L. Jongheana 
Epidendrum radicans, E, macrochilum, Odontoglossum citrosmum, and 
the Barkerias, will need but very little shade, and then only for a few hours 
during the middle of the day when the sun would be shining directly on the 
plants. : a 
All enthusiastic Orchid growers will certainly derive a considerable 
amount of pleasure and interest by looking through their Orchid collections 
during this month, and will observe how quickly a number of different 
species have responded to the increase of light and sun-heat. Many young 
breaks will have commenced to grow, new roots are pushing rapidly 
through the soil, and fresh flower spikes appear every day. The growing 
season for the majority of the plants has begun, and conditions essential for 
their healthy development must be regularly and systematically carried out. 
CALANTHES.—Among the numerous plants that are commencing t0 
