360 THE ORCHID REVIEW. (DECEMBER, IQII. 
day in bright weather, whilst at night it should not be lower than 53° 
Fahr. The bottom ventilators should be open whenever the weather and 
the internal temperature of the house allow of a little air being admitted. 
If possible, change the atmosphere daily. This applies equally to the 
Cool house. The flowers of Cattleyas and their allies are very delicate, and 
are easily injured by fog. Therefore on the appearance of this the 
ventilators should be closed, the floors well damped, and the temperature 
raised a few degrees. 
The various hybrids of Cattleya Dowiana aurea, Bowringiana, Hardyana, 
and labiata should now be in flower, together with C. Percivaliana, and a 
few early C. Triane. These should be placed at the warmest end of the - 
house, and kept well watered. Vanda ccerulea, if in spike, should be placed 
at the warmest end of the house, and given as much light as possible. 
Dendrobiums which have finished resting, and whose flower buds are just 
visible, should be returned to the warmest end of the house, and given an 
increased supply of water. Any which have finished growing—this can be 
recognised by the non-appearance of fresh leaves at the apex of the bulbs— 
should be moved to the coolest end of the house, and water given every few 
days. The leaves of the inmates of this house should be sponged regularly, 
and any loose bulbs neatly tied. 
SUGGESTED ADDITIONS. 
ONCIDIUM TIGRINUM.—At this time of year there are few Orchids which 
make a brighter show in the Cool house than the above. It is a strong 
growing species, throwing up long branching spikes, which carry any 
number of flowers-up to fifty. These individually are of good size, and last 
several weeks in full beauty. The sepals and petals are narrow, pale yellow 
in colour, but almost obliterated by thick bars of dark brown, and the lip is 
exceedingly broad, pure yellow, and of remarkable thickness. The whole 
flower emits a powerful scent of violets, and an individual bloom is suitable 
for a button-hole. The allied O. unguiculatum bears smaller but rather 
more numerous flowers. 
ZYGOPETALUM MackAyi.—This is a beautiful Orchid for the Cattleya 
house, and is now sending up long spikes of its handsome flowers, which, if 
kept cool and free from damp, will continue for many weeks in full beauty. 
In shape the blossoms bear a striking resemblance to the preceding, but the 
colour is very different, and in its growth the plant exhibits much dis- 
similarity. It makes large pseudobulbs, which bear leaves often a yard long. 
The flowers have a faint but pleasing scent. The sepals and petals are 
emerald green, barred with chocolate brown, the lip white, prettily pencilled 
and veined with deep violet blue. It is a comparatively cheap Orchid, and 
one which will do best at the shady end of the house, in company with the 
Cypripediums. 
