Noy.-DEc., 1918.] THE ORCHID REVIEW. 237 
water will be needed; only sufficient to keep the plants from shrivelling. 
Too much water at the roots, or in the atmosphere, especially in conjuntion 
with a low temperature at this season, may be the means of many plants 
getting the dreaded black spot in the leaves, which is not easily eradicated. 
VANDA TRICOLOR.-—Vandas of the tricolor andsuavis group may at this 
season be repotted, if they have lost their lower leaves and become leggy: 
These plants resent being disturbed at the roots at any time, and the 
mistake is often made of placing them into too large pots, thereby encum, 
bering them with more rooting material than they can push through. Live 
sphagnum moss pressed firmly among the roots makes a suitable compost, 
and sufficient broken crocks should be added to keep the whole porous. 
Ample drainage is necessary, and each stem should be made secure .and the 
moss sprinkled with water to keep it alive whenever it becomes dry. These 
plants thrive much better when placed upon the damp bottom, where the 
moisture ascends around them, than when placed upon an open-work stage. 
A warm Intermediate house temperature is to their liking at all seasons. 
ANGR&cUMs, Saccolabiums, and Rhynchostylis, are all evergreen plants 
which require the warmth of the East Indian house the whole year round, 
anda reasonable amount of atmospheric moisture should be retained at all 
seasons. They will now have completed their growths; the green tips of 
the roots having become sealed over ; and only sufficient water is necessary 
whilst the plants are in this condition to keep them plump, and in a normal 
condition. 
MILTONIA VEXILLARIA and its hybrids should now be growing rapidly 
and pushing their roots through the compost. During the winter months 
they require watering with extreme care, and the compost should be allowed 
to become dry between each application. In the spring they will then be 
Well rooted, and take up water readily, and produce strong flower spikes. 
They should at this season occupy a light position in a house where a 
lemperature of 53° F., is maintained at night, with a slight increase during 
the day. M. Roezlii and M, Phalaenopsis, with M. Bleuana and other 
hybrids, require more heat than M. vexillaria, and should either be grown 
‘Na house where a higher temperature is maintained, or placed in the 
Warmest part of the house. 
DENDROBIUMS.--The deciduous Dendrobiums now at rest must have 
Water afforded them whenever they become dry, as should the plants be 
allowed to shrivel, not only may the crop of flowers be lost, but the plants 
May become so exhausted that it may take considerable time to bring them 
back to good health. D. Phalenopsis and D. formosum, as they pass out 
of bloom, should be carefully rested in a temperature which does not fall below 
*,and receive sufficient water to maintain them in a plump condition. The 
atmosphere should be kept in a fairly dry state, which will assist in 
