JoLy, 1907-] THE ORCHID REVIEW. 205 
Those that have been disturbed will not require much water till the new 
roots have taken good hold of the compost. At no time do they require 
water till they have become fairly dry. Afford them a position in the 
Intermediate house, choosing one that is fairly light. Those that do not 
require potting will be benefited by having some of the surface material 
removed and fresh added for the new roots to enter. One important factor 
towards success in growing this fascinating species is to see that the 
quarters given are buoyant, as they resent a close and stuffy atmosphere. 
DENDROBIUM thyrsiflorum, densiflorum, Farmeri, and most of the long- 
bulbed section, such as D. fimbriatum, and moschatum, will have their 
growth sufficiently forward to enable any repotting necessary being done. 
A compost of good peat and sphagnum in equal parts, with some sand and 
small crocks, should be used. Give a good drainage of rhizomes, over a 
few crocks, and pot firmly, keeping the compost level with the rim of the 
pot. These are very beautiful, but they are often sadly retarded by having 
a host of back bulbs, especially D. thyrsiflorum and D. densiflorum. _ It is 
most desirable to remove any beyond three behind each lead, and when 
plants are being overhauled cut them out freely, and when being potted cut 
away the rhizome from which the bulbs have been removed. Place them 
in the stove to finish up their growths; afterwards they are best suited 
when removed to a rather cooler and drier house. Water carefully till root 
action is very pronounced, after which a liberal supply should be given till 
the new pseudobulb is thoroughly made up. 
D. chrysotoxum and suavissimum may also be potted in the same 
material, using non-perforated pans. These should be given a place where 
they have much light, in about Cattleya house temperature, so that the 
growths made may be very firm. Soft, immature growths are most 
difficult to flower, and my experience has been that no amount of 
ripening afterwards ever fully makes up for the loss sustained through 
being grown in too shady and too limited a house. When growing 
freely keep them well supplied with water, at other times only water when 
they become dry. 
D. Parishii and primulinum will both be ready for potting this month, 
and the same treatment given to D. chrysotoxum will be found very suitable, 
The rotting of the new pseudo-bulb so often seen in D. primulinum during 
the winter months is due more or less to its being developed in a hot shady 
house; the growths made in the Cattleya house may be shorter, but are 
much firmer in texture and better able to resist the evil effects of our dark, 
dull winters. Neither of these species require much water at any season. 
D. Brymerianum will also be ready for potting during this month. Use 
the same compost, and ordinary pots, giving a drainage of one half of their 
depth. This extraordinary species does not like being disturbed, so if 
