~~ attention sooner or later. 
274 THE ORCHID REVIEW. [SEPTEMBER, I903- 
rocks, but seldom on the perpendicular escarpments like many other 
Cypripedes.” It also occurs on the Tambilan Islands, between Sngapore 
and Sarawak. A note on the culture of this beautiful plant is given in our 
seventh volume (pp. 145, 146) by O. O. Wrigley, Esq., who is very 
successful in cultivating it. 
CALENDAR OF OPERATIONS FOR SEPTEMBER. 
By JOHN MAckKAY, The Gardens, Highbury, Birmingham. 
THE advent of September is generally considered by Orchid cultivators as 
the commencement of what is termed the resting period, and therefore 
the aim should be now to give the plants every assistance to thoroughly 
ripen and consolidate their growths, so as to prepare them to pass safely 
through the coming winter. As the season advances it will be necessary to 
gradually expose the collection as a whole to extra sunlight, and at the 
same time, on every favourable opportunity, a free circulation of air should 
be encouraged. The blinds on the north side of the houses will scarcely be 
required at all (as, indeed, they have been used here very little of late), 
while those facing south need not be let down so early in the day, and 
must, of course, be drawn up sooner in the afternoon, while in a very short 
time they may be dispensed with altogether. It is important at the same 
time that discrimination should be used in this matter of reducing 
the amount of shading, as there are certain plants that are liablé to serious 
injury ifexposed to extra sunlight, as, for instance, Phalaenopsis, Masde- 
vallias, and Odontoglossums. 
The atmosphere being cooler and moister at this. time, considerably 
less damping will be needed, and the plants will require water less often at 
the root. During the present month, unless a congiderable amount of fire- 
heat is requisite to keep up the temperature—which was the case last 
month—the East Indian and Cattleya divisions may be moderately damped 
down, both morning and evening. Immediately the houses are damped 
down start the fires gently, so that, if required, enough fire-heat may be at 
- command to prevent the temperatures from falling too low during the 
night. The thermometer in the Warm house by the morning should be at 
about 68°, and in the Cattleya or Intermediate house at 65°.. In the Cool 
houses, if properly attended to in the matter of ventilation, damping down, 
and shading, the temperature will be a few degrees below the external air. 
_ ‘Continue potting and top-dressing the Odontoglossums as they reach 
se the stage suitable for that operation. In addition to O. crispum, such species 
iy as O. Hallii, triumphans, tripudians, and those of the luteopurpureum section, 
with the natural hybrids O. X elegans, x excellens, &c., will all need 
Also-. cordatum and maculatum, Oncidium 
