214 THE ORCHID REVIEW. (JULY, 1915. 
the old roots are gradually but slowly decaying, and the new roots will not 
thrive for long’in excessively wet material. Give the plants a nice evenly- 
balanced growing atmosphere, especially in the afternoon and evening, and 
plenty of fresh air at all times. Undoubtedly Cattleyas and Leelias 
appreciate fresh air as much as any Orchids, in fact a great deal more ‘than 
many growers would care to risk. Some of these plants that have been 
repotted—C. Warneri, as an example—should, after making a quantity of 
roots, be placed at the cooler end of the house, because, so far as growth is 
concerned, the plants will be at rest. Lelia purpurata should not be 
disturbed until growth commences. It is advisable to keep this plant fairly 
cool also, and in a resting condition as long as possible, as the growths 
that start away too early in the season are not so likely to produce flower 
sheaths as those that push up later. C. Warscewiczii (gigas) and its 
varieties are now coming into bloom, and should be kept at the warmer end 
of the house, so that the flowers may develop properly. A little extra water 
may be afforded to the roots till the flowers open, but when the plants 
have flowered gradually expose the growths to more sun and air. 
ODONTOGLOSSUM CITROSMUM.—Plants of this Mexican species in many 
collections have passed their flowering season, and as the young growths 
are making considerable headway, now is the time for repotting if 
necessary. As the plants do not make many roots, receptacles of the 
smallest size should be used. Shallow Orchid pans that may be suspended 
_ from. the roof are preferable to baskets. Afford good drainage, and use 
a shallow compost of osmunda fibre and At fibre, chopped up rather small 
and well mixed together. Cut off all useless back bulbs, and pot each 
plant quite firmly. Suspend the plants from the roof of the Mexican house; 
and for a few weeks after root disturbance keep the surface of the compost 
just moist. Towards the completion of growth the plants will take plenty 
of water each time the soil becomes dry. O. citrosmum, like Lelia 
anceps, requires a rather warm sunny position by day, but cooler and 
moister conditions at night, with plenty of ventilation at all times. : 
CooL HousE.—In this house plants of Odontoglossum grande, 
Williamsianum, Insleayi, and Schlieperianum are growing freely, and any 
that require larger pots should be attended to. A very porous compost of 
osmunda fibre should be employed, for, although these plants require 
copious waterings when in full growth, water should pass quickly through 
the soil, as through a sieve, as the fleshy roots are liable to decay if the 
compost becomes dense and saturated. See that no water, either from 
drip or syringe, lodges in the growths, or they will probably damp off. 
of these plants grow well on a high dry shelf in the Cool house, and they 
need plenty of light when growing, but not direct sunshine. Slugs and 
woodlice are fond of the tissues of the young growths, also the succulent 
