260 THE ORCHID REVIEW. { AUGUST, 1913, 
all ready to pot at one time. The autumn-flowering varieties are best left 
over until the early spring months before repotting is attempted. A similar 
compost to that used for Odontoglossums will answer their requirements, 
and a suitable position for them is a moist position in the Intermediate 
house. M. Bleuana should be found a slightly warmer position than M. 
vexillaria, whilst M. Roezlii, and its variety alba, should be found a position 
in the warm Intermediate house. 
PHALNOPSIS.—The large flowering varieties, such as P. Schilleriana, 
P. Aphrodite, P. Stuartiana, P. Sanderiana, and the free-growing P. 
amabilis Rimestadiana, owing to the favourable season, have made 
considerable progress with their new leaves. A high sun-heated 
temperature is always to their benefit. During the warm weather every 
opportunity should be taken to ventilate the house in which they are 
growing, as a daily supply of fresh air is important. It is advisable that 
the house should be shut early in the afternoons, thoroughly damping the 
floors and staging, and everything under and about the hot water pipes. 
The temperature should be maintained at night as nearly as possible from 
70° to 75°, and should the temperature fall lower no damping down should 
be done until the former figure is reached. The chief causes of failure with 
these plants are a low, damp atmosphere and saturated sour material at the 
roots. 
OpoNTOGLOssU Ms.—Towards the end of the month, should the weather | 
not be too hot, a commencement can be made with the repotting of these 
plants. Take each plant as it gets into the desired condition, and should 
there be any likelihood of the compost becoming decomposed, don’t 
hesitate to repot, as these plants cannot thrive in sour compost. A 
compost as previously advised for this genus will be found quite satis- 
factory. 
DenprosiuMs.—During the present month many of the Dendrobiums, 
especially those of the D. nobile section, will be completing their growth. 
It will be necessary to examine them frequently, in order that those which 
have completed their growth, and have the terminal leaf fully expanded, 
may be removed to a cooler and dryer atmosphere, where they will receive 
the benefit of more light and air. They should be exposed gradually to full 
sunshine in order to thoroughly mature the newly-made growths, and 
should receive sufficient water to keep them plump. 
GENERAL REMARKS.—We are fast reaching that season of the year when 
we shall have to make preparation for the safe keeping of the plants during 
the winter, and it will therefore be. advisable to put everything that. Is 
considered faulty in the heating apparatus, or other. things appertaining to 
the successful working of the houses, in thorough repair. The work for 
the month will consist of the usual routine of potting and cleaning, and 
