148 THE ORCHID REVIEW. 
and has white flowers, with a yellow disc to the lip, and a small maroon 
blotch near the base. In one of the seedlings the yellow disc is rather large, 
and the maroon blotch is almost divided into a pair of lateral ones, thus 
showing the influence of the pollen parent very clearly. It is uncertain at 
present which is the more typical form. It is a very promising hybrid. 
CALENDAR OF OPERATIONS FOR MAY. 
By H. A. BURBERRY, Orchid Specialist, King’s Heath, Birmingham. 
THE figures here given may be said to be the proper summer or growing 
temperatures, and should be given throughout the summer months. 
East INDIAN OR Warmest Hovuse.—This should range by day 
anywhere between the figures of 75° to 90°, or even higher by sun heat, 
being guided much by the outside conditions. The night reading should be 
from 65° to 70%, and it may fall as low as 60° by morning, the early 
morning temperature being the coldest in their native habitats. 
CATTLEYA AND INTERMEDIATE Hovuses.—The inmates of these 
departments are likewise fond of a considerable amount of heat from now 
onwards, and these houses may range from 70° to 80°, or higher during 
sunny, warm weather, with a night temperature of 60° to 65”. 
CooL, oR OponTroGLossum HovusE.—This structure must now be kept 
_ as cool as possible, both night and day, for strong heat is most distasteful 
to Odontoglossums, and especially is this so if insufficiently ventilated. 
One cannot avoid the temperature rising in hot weather, inside, 
as well as out, but he can, by Siving air, avoid a close, oppressive 
atmosphere. 
FirE Heat.—Very little of this will now be needed, and, indeed, none 
in the last-named department. For the warmest house, however, it must — 
yet be given at night for some time to come, and also during dull, sunless, 
or cold days. The intermediate departments will likewise, unless the 
weather very much alter, still require a little at night for some few weeks, © 
but during the days, unless they be exceptionally cold and cheerless, none 
should be needed. Fire heat should only be used when really necessary—at 
other times it becomes an evil, and does more harm than good. 
_ DAMPING-DOWN FOR MoistuRE.—As we are now entering on the 
growing season proper, when the days are long and the sun powerful, there 
must be no lack of atmospheric moisture. “This is now exactly what is — 
wanted, as everything is bristling with new growths and new rootlets, 
which must be encouraged by every possible means. Make use of the 
syringe about the house freely, two or three times at least, in fact, itis now. 
almost impossible to create too much moisture, that is if the ventilators are 
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