SEPTEMBER, 1912,] THE ORCHID REVIEW. 269 
crispum, and has probably occurred in many collections, but such cases 
appear to have escaped record. I have examined microscopically leaves of 
Odontoglossum sent to the Editor by Mr. Nye, and also those of a plant in 
the Kew collection, and find them badly infected with this fungus. 
The first sign of the disease is the change in colour of the leaves to a 
sickly yellowish green. This is soon followed by the appearance, here and 
there, on the lower surface of the leaf, of olive-green, ill-defined blotches, 
each covered with a delicate floceose mould, which is later coated with a 
fine greyish powder. 
A section through the leaf at a disease point shows the brown shrivelled 
tissue permeated by mycelium—at first colourless but when older changing 
to a pale brownish green. From this mycelium clusters of erect, sinuous, 
sometimes branched conidiophores are formed, which burst through the 
epidermis of the leaf and produce, at the tips of their branches, long narrow 
tapering conidia, at first continuous but at maturity becoming two or three 
chambered. These conidia are set free in great numbers and form the 
greyish powder previously mentioned. Each under favourable conditions 
is capable of infecting a new plant. 
Only the older leaves appear to be attacked, but when once the disease 
has obtained a foothold it kills the leaves in rapid succession, 
Infected plants should be isolated where practicable, and all the badly 
diseased leaves removed and burnt, the remainder being sponged at intervals. 
with a weak solution of copper sulphate. Where the disease in rampant 
such drastic measures as those used by Mr. Warren may be employed. 
F, W. ROLrFe. 
EXPORTING ORCHIDS BY POST. 
WE have received from Baron R. Kawada, Tokyo, Japan, a photograph 
showing a very ingenious method of packing Orchids for long distances by 
post, which has been adopted by Messrs. J. & A. A. McBean, of Cooks- 
bridge, by which the handsome Cymbidium Schlegelii and other hybrid 
Cymbidiums have been sent to Japan via Siberia. Three boxes were 
sent, on March 27th, 28th, and April rst, each containing two plants, and, 
in spite of the early date, Baron Kawada remarks that they arrived in perfect 
condition, not a sheath or leaf having changed its natural colour, and every 
root was fresh. The box is lined with cotton wool, and the surface papered,,. 
which protects the plant from cold. The pots are firmly fixed, one at each 
end of the box, and there is an oblique longitudinal partition, forming 
cavities in which the leaves are carefully inserted, without any further 
wrappings, the longer ones being carefully curved over. Ventilation is 
ingeniously contrived by means of holes covered with gauze, and protected 
with cotton wool inside so as to moderate the cold air before reaching the 
