APRIL, 1923.] THE ORCHID REVIEW. 113 
should be mixed well together. In repotting press the compost with 
moderate firmness around the base of each pseudo-bulb, and keep the soil 
about an inch below the rim of the pot. After repotting the plant will 
require little or no water until the young roots have developed well into the 
compost and have grown near the sides of the pots, when it should be 
gradually increased. When the soil is well filled with roots, copious supplies 
will be needed all through their season of growth. The plants should be 
grown in plenty of heat and atmospheric moisture, and not be exposed to too 
much bright sunshine. The back pseudo-bulbs may be employed to increase 
the stock ; arrange them on a layer of sphagnum-moss in a shallow recep- 
tacle, and place them in a warm, moist house; they will quickly produce 
new growth, when they may be potted and treated in a similar manner to 
the older examples. 
CATASETUMS, CYNOCHES AND Mormopes.—After a long decided season 
of rest these Orchids are now commencing to grow afresh and should receive 
attention for repotting. Shake the plants out of the old compost, cut away 
all decayed parts, and pot the plants each season in receptacles of moderate 
size only, for overpotting is injurious to them; plenty of drainage is 
essential. Osmunda fibre is the best rooting medium, this should be chopped 
up in rather small pieces. The most suitable receptacle is the ordinary 
flower pot, with three holes just under the rim, and wire handles attached. 
suspend the plants in the warmest house, and grow them as quickly as 
possible, giving them very similar treatment to the Calanthes. 
DENDROBIUMS.—The species and numerous hybrids of the Dendrobium 
nobile type commence to make new growth as they pass out of flower. 
They quickly emit new roots from the base of the young growths, when 
they are a few inches high, and those that need repotting should then be 
attended to. Ordinary flower pots or pans without side holes are the most 
suitable receptacles. These should be just large enough to hold the plant 
comfortably. Dendrobiums root freely in Osmunda fibre chopped rather 
Small, and fresh sphagnum moss. When repotting well-established plants 
that have filled their pots with roots it may be difficult to turn them out 
without causing injury to the roots, and in such cases break the old pot and 
remove it in small portions. If the old soil is decayed pick out as much of 
it as is practicable, cut away the useless back pseudo-bulbs, leaving three 
behind each leading joint. Pot rather firmly, and, when finished, the base 
of the plant should be a little below the rim of the pot. For some time 
after root disturbance water should be applied with great discretion, for 
there is a danger of both the young roots and growths damping off if too 
much moisture is applied. Healthy specimens that have ample pot room, 
and the compost in good condition, should have a little of the old materials 
Temoved from between the surface roots and replaced by new. The old 
