76 THE ORCHID REVIEW. [MaRcH, 1914. 
y 
OR amateur growers, and especially for those who exhibit at autumn 
f shows, this Odontoglossum is of great use, being free-flowering and of 
easy culture. Its spikes of large yellow and chestnut brown blossoms are 
thrown up well above the foliage, and are very effective. 
To keep this plant in a healthy and vigorous condition annual repotting 
is advisable, which is best done this month, when the new growths have 
nicely broken away and are ready to derive nourishment from new compost. 
This should consist of osmunda fibre, oak leaves, and heads of living 
sphagnum moss, mixing all well together and taking care not to plant too 
‘deeply in the pot. After repotting, the plants must be shaded from strong 
sun, and water be given with caution, until the young roots begin to take 
hold of the new soil. 
When the plants have got over the effects of repotting, the best position 
for them is on a shelf near the roof glass, where they may get abundance of 
light and air, and during the summer copious watering every other day will 
usually be needed, with a light spraying over the leaves morning and evening. 
Up to the middle of September light shading will be necessary for a few 
hours, in the middle of the day, to prevent the sun from scorching the 
leaves. Keep a sharp look-out for thrip, and if any are detected fumigation 
must be resorted to. 
When finishing their bulbs they will need all the light possible, so as to 
mature them properly, and a little weak cow manure water about twice a 
week will help them to throw up strong spikes. Keep a sharp look-out for 
slugs, which, if unchecked, cause serious havoc among the spikes. As soon 
as the buds begin to colour discontinue the application of manure water 
and overhead spraying, and if when in blossom the plants are moved to a 
cooler and drier house, their flowers will last for several weeks. 
After flowering, the plants should be gradually rested, by decreasing the 
amount of water, until only just sufficient be given to keep the bulbs from 
shrivelling. A light and airy house, where the temperature does not fall 
below 50° Fahr., will suit them to perfection, and no attempt should be 
made to induce them to start into growth again until the spring, as a long 
and decided rest is of absolute necessity. 
In regard to Mr. Ashworth’s note on page 362 of the last volume, I 
may say that I have repeatedly attempted to raise seedlings of this Orchid 
without success. Often the pollinated flowers have failed to set at all, or else 
a capsule has formed only to fall off prematurely. At the moment of writing 
a pod is forming by intercrossing this species with Oncidium tigrinum, but 
1 am not sanguine of success. C. ALwyn HARRISON. 
S| CULTURE OF ODONTOGLOSSUM GRANDE. 
