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DECEMBER, 1909.] THE ORCHID REVIEW. 365 
spikes should not be allowed to become dust dry, or the flowers will be 
small. 
DENDROBES.—Many of these will be showing the buds just bursting 
from the node, and these will need careful watering, or the buds will fail to 
develop. They should not be put into stronger heat until the buds are 
properly formed. Let them come as naturally as possible, and give all the 
light and air possible on favourable days. 
SEEDLINGS are often difficult to manage just now, especially where they 
have to be grown with the other Warm house plants, and cannot often be 
given the attention which they require. Any that require larger pots can 
be shifted on without disturbing the roots, provided that the old material is 
sweet and sound. Keep a nice genial atmosphere to encourage them to 
keep growing. Use the sprayer on favourable days, as it assists in keeping 
them free from thrip, which is the worst enemy seedlings have to contend 
with. 
FUMIGATE the houses occasionally to keep the plants clean, always 
avoiding an overdose, even of what are termed harmless fumigating 
preparations. 
DampinG the houses should be closely attended to, but do not get them 
overcharged with moisture. On the other hand, do not get them too dry. 
If moisture is hanging about the plants in the morning the night damping 
should be made lighter. A little observation will soon give the right 
condition. It is difficult to work to a set rule as houses vary so much, and 
the outside conditions have so much to do with working the houses. 
TEMPERATURES should be kept about as follows :— 
Stove ne s Morning, 65° ae Midday, 70° 
Cattleya house... Morning, 60° jae Midday, 65° 
Intermediate house Morning, 55° sie Midday, 60° 
Cool house Hy Morning, 50° Midday, 55° 
A rise of 5° in the day-time issufficient by aukisiotsl heat, but 5° more is 
permissible by sun heat on bright days, and at such times the fires should 
be kept well under control. 
ONCIDIUM VARICOSUM CONCOLOR.—A plant of this very rare variety has 
just flowered in the establishment of Messrs. Stuart Low & Co., Bush Hill 
Park. It appeared in a mass of O. varicosum from the district whence the 
plant is so often imported, and was in the same mass as an QO. varicosum 
Rogersii. It is a form from which all the brown markings have vanished. 
It originally appeared in the establishment of M. de Langhe-Vervaene, at 
St. Gilles, Brussels, in 1898, and was described by Prof. Cogniaux (Dict. Ic. 
Orch., Oncid., t. 18 ; Chron. Orch., p. 136). The plant was exhibited at the 
R. H. S. meeting held on November 23rd.—R.A.R. 
