OcToBeEr, 1917-] THE ORCHID REVIEW. 23! 
Oncipiums.—In the Cool house several species of these useful plants, 
such as O. crispum, Forbesii, varicosum and others are developing new 
roots and flower spikes. These plants produce flowers so abundantly that 
they exhaust themselves quickly if the flowers are allowed toremain upon 
the plants for too long a period. To keep the plants in good health it is 
advisable to remove the spikes soon after the flowers are open, and weak 
plants should have them removed as soon as they are observed. After 
flowering tie plants should have a good rest, but not be allowed to suffer 
for the want of moisture at the root. — This also refers to O. concolor; which 
by this time will have made up its bulbs, but resents a long dry rest more 
than the others mentioned. 
TuuniAs.—As soon as the plants have lost their leaves they may be 
placed in their resting quarters. Those plants which have not yet lost 
their foliage should have water afforded them from time to time, and they 
should be syringed occasionally to keep them free from red spider and 
thrip, which often affects them at this season. 
GENERAL REMARKS.—Every opportunity should be taken to push on 
with necessary work, much of which is very pressing at this season, 
especially with the limited staffs now available. The cleansing of the 
houses and the plants is of the greatest importance, and takes up much 
time, tor if it is to be effectual it must be thoroughly done. Thoroughness 
is more essential in plant cleaning than perhaps anything else, as when 
only half done we may safely say it is not done atall. The placing of the 
plants in their winter quarters is an item which will occupy our time during 
the present month, and efforts should be made to give every plant a 
position to its liking. The winter months are the best to eradicate scale 
and other insect pests which trouble us, and war should be made on every- 
thing which feeds on the life-blood of our plants. The true horticulturist 
is always fighting the pest which affect his plants, well knowing that it is 
one of the essentials to success. 
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CaTrLeya Oxtvia.—Flowers of an attractive hybrid are sent from the 
collection of E. F. Clark, Esq., Evershot, Dorset. There is a little doubt 
about the exact parentage, though Mr. Clark believes it came from a cross, 
C. intermedia X Trianz nivea, made by him in April, 1903, as other 
crosses, which he mentions, would not account for the characters. We 
fully agree. As to C. intermedia, there cannot be the slightest doubt, for 
the resemblance to C. suavior, in colour and other details, is unmistak- 
able, and the modifications are such as would be expected from the influence 
of C. Triane. The flowers are blush pink, with the front of the lip crimson 
purple. C. Olivia was originally raised by Messrs. Veith from the reverse 
cross, and received an Award of Merit from the R.H.S. in October, 1897. 
