298 THE ORCHID REVIEW. [OcToBER, 1907. 
had been made and that C. concolor was the second parent. He has since 
written, however, that as the flower has become mature the niveum 
character has developed, and no doubt the record of niveum is correct.” 
The matter was afterwards confirmed by Mr. Oakes Ames (O.R. viii. p. 358). 
Speaking of the plant of P. tonsum given as the frontispiece to that volume, 
Mr. Ames wrote that it was a particularly good fo:m, and was used by 
him to obtain P. x Olivia, which in his estimation is the most beautiful of 
the P. niveum hybrids. There is little further to add as the figure speaks 
for itself. The veining of the flower is reddish purple, and there are 4 
number of minute dark purple dots on the petals, which can be seen in the 
figure by the aid of a lens. It is certainly very beautiful. 
CALENDAR OF OPERATIONS FOR OCTOBER. 
By W. P. Bounp, Gatton Park, Reigate. 
WirH October comes a more or less general change throughout the whole 
of the Orchid houses, and the more gradually this can be brought about 
the better for the inmates. After such a sunless season as we have 
experienced this year, when the outside night temperature during what should 
have been our warmest months, has fallen below 45° many times, the plants 
in general have not benefited to the degree they should have done by the 
summer season, and they are now backward in growth for the time of year, 
and are not ready to withstand the evil effects of our short, dull days. I 
consider it is highly important that the new growth should be hardened 
and solidified as much as possible during this month, even if by so doing. 
the growths will not attain the size they would have done under more 
favourable conditions. 
It will not be possible yet to dispense with blinds entirely, but they 
should only be used on shade-loving plants that would feel detrimental 
effects from direct sunshine during the early and middle part of this month. 
Such plants as Cattleyas, Lzlias, and Dendrobiums will not need any 
further shading with blinds if stippling has been used, as by now it has- 
become very thin, yet quite sufficient to prevent any injury to the plants. 
The sun influence through a thin stippling has a much quicker action on 
the new growth, both in developing and maturing, than when blinds are 
used, unless they should be of a very open and light texture. I never mind 
seeing Cattleyas and the like take a somewhat yellow shade in the foliage 
during this month, for it will probably prevent any attack of the dreaded 
black disease. It is plants that are too succulent that most frequently 
come to grief during the winter months. On all favourable days it willbe 
well to admit a good deal of air to all the houses, and whenever possible the: 
