278 THE ORCHID REVIEW. 
grow intermixed, a search when the plants are in flower might yield som) 
interesting results. I have heard of importations of both these Species 
being received, but do not know if any hybrids flowered out of them.. Lam 
not without hopes that the attention now being paid to this subject gene 
rally will result in a considerable increase in our knowledge, as it isa 
matter of great interest, both from a horticultural and a scientific stand. 
point. : 
R. A. R 
(To be continued.) 
CALENDAR OF OPERATIONS FOR SEPTEMBER. 
By W. H. WuirTe, Burford, Dorking. ; 
THE month of September is generally considered by Orchid cultivators a 
the commencement of what is termed the resting period, and therefore the 
great object of the grower should be to give the plants every assistance 10 
thoroughly ripen and consolidate their growths, so as to prepare them to 
pass safely through the coming winter. As the autumn 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 a 
air should be encouraged. The blinds on the north side of the houses wil 
scarcely be required at all, while those facing south need not be let dows 
So early as usual in the day, and must, of course, be drawn up sooner ia 
the afternoon, while in a very short time they may be dispensed with 
altogether. In this matter of reducing the amount of shading, it 8 | 
very important that discrimination should be used, as there are certain 
plants that are liable to permanent injury if exposed to extra sunlight. . 
For instance, such plants as Phalenopses, Angraecums Ellisii, citratu | 
and Kotschyi, Phaius tuberculosus, Cypripediums generally and C. supe 
biens in particular, Ccelogyne asperata, and C. Cumingii, also many of od 
Oncidiums, Masdevallias, and Odontoglossums, are easily affected hy @ 
mesh sunlight. I am well aware that in mixed collections of Orchids #® | 
a difficult matter to suit all plants in their special requirements as oo 
Shading, especially during the spring and autumn months, but a Bt o 
amount of good may be done by every grower in selecting the most suitab™ 
Positions for certain plants. I remember a good grower, when writing © 
this point, stating that he learnt a great deal by visiting other collection 
and noting down the positions that the best grown plants occupied. 5 ] 
One of the greatest mistakes young beginners in the cultivation © 
Orchids are liable to, especially when the plants are at rest, is the comm 
uld bee! 
keeping up of excessive supplies of atmospheric moisture. They sho 
