178 THE ORCHID REVIEW. [JUNE, 1913- 
these which has not come out in the photograph. It is a handsome hybrid, 
and should develop into a fine thing when the plant becomes strong. It is 
named after M. Chollet, Messrs. Sander’s able hybridist at Bruges. We 
know of only one other hybrid with which it is at all comparable, namely, 
Odontonia Vuylstekei (O.R., xviii. p. 209), raised by M. Ch. Vuylsteke 
from Miltonia vexillaria and Odontoglossum amabile, which is very nearly 
allied, for the Miltonia parent is common to both, while Odontoglossum 
amabile is partly derived from O. Harryanum. Odontonia Firminii (M.- 
vexillaria X O.crispum), though somewhat similar in shape, is very different 
in colour. A promising development would be the intercrossing of M. 
vexillaria with some of the large and very highly-coloured hybrid Odonto- 
glossums now in existence. 
THE AMATEUR’S COLLECTION. 
By C. Atwyn Harrison, F.R.H.S. 
DurinG this and the following months, one of the main items in the 
cultivation of Cool Orchids is to keep the temperature within the limit of 
65° F., and should the weather prove hot this isa matter of some difficulty, 
but the following hints may be of help to a beginner: Keep the house well 
saturated with moisture, damping down usually three times daily, at ten 
a.m., midday, and again in the afternoon. Lower the blinds about ten, and 
do not raise them until the sun is not shining on the house. Admit as 
much air as possible by means of the top and bottom ventilators, and by 
these means it will be found that the internal temperature of the house can 
be kept near the prescribed degree. 
Although not of vital importance, I am strongly in favour of having the 
blind raised a few inches above the roof glass, as by this method a free 
current of air can pass between this and the glass, thus enabling the latter 
to be kept cooler than would otherwise be possible. 
All plants in flower and actively growing must be kept well supplied 
with water, and a dose may probably be needed once a day, but any which 
are passing out of bloom and entering upon their season of rest must be 
kept drier, merely giving sufficient to kept the compost moist, not wet. 
Odontoglossum grande will now be starting into growth, and should be 
repotted, using a mixture of two parts osmunda fibre to one each of oak 
leaves and sphagnum moss. Place the plant at the warmest end of the 
house and in such a position that it will get plenty of light. Pot fairly 
firmly, and be careful to see that the base of the bulbs is not buried in the 
compost, but is slightly above it. In my opinion, however, it is now too 
hot to repot other species and hybrids of Odontoglossum. I prefer to defer 
it until the beginning of September, when a better start will be made. 
Thrips are liable to be troublesome now that the warmer weather has set 
