14 THE ORCHID REVIEW. [JuLY-AUGUST, I919. 
suitable. The late flowering varieties are best deferred to a later period 
‘before attempting repotting. Their culture is similar, but their later period 
of growth necessitates a corresponding delay.in the time of potting. 
ODONTOGLOSSUM CRISPUM AND ALLIES.—Towards the end of August 
a start should be made to repot any Odontoglossums of this class that may 
require it.. Plants of which the new growth thas attained the length of 
several inches, and are about to produce new roots, should have attention 
first, to be followed by others as they reach this stage. As many as possible 
should be repotted at this season, as the plants quickly re-establish them- 
selves. Large pots should not be used, and the old rootless and leafless 
pseudobulbs should be removed. A suitable compost is madé up of equal 
parts of peat, Ar fibre, and sphagnum moss, with a slight addition of 
broken leaves. 
OponTIODAS.—The hybrids between Cochlioda and Odontoglossum are 
now becoming very numerous, and as their colour is highly desirable, they 
are worthy of extended culture. They succeed under similar conditions ta 
Odontoglossum, and in the same compost. They are’ of very diverse 
parentage, and naturally show much disparity constitutionally, some being 
more vigorous than others. There are other inmates of the Cool house that 
require repotting at this season, including the different Maxillarias. For 
such species as M. Sanderiana, and others which produce their flowers in a 
downward direction, shallow teak wood baskets make the best receptacles. 
For the othérs pots or pans are suitable, and all will succeed in a mixture of 
ATI fibre, or osmunda fibre when obtainable, mixed with a small quantity of 
sphagnum moss. ; . 
ONcIDIUMs.—O. concolor, Phalznopsis, dasytyle, nubigenum, Lawrence- 
anum, Mantinii, Marshallianum, varicosum, and others that have started 
into growth, may also be repotted. A similar compost to that used for 
‘Odontoglossums may be used for these plants, to which slightly. more leaves 
may be added. 
DENDROBIUMS.—Before another Calendar appears many plants of the 
deciduous section of this large genus will be completing their growth, and 
when this has been finally made it is necessary to remove the plants to a 
cooler and drier atmosphere, where they should receive the benefit of extra 
sunlight and air, so as to consolidate and thoroughly bring the newly-made 
growths to maturity. It is not always advisable to remove the plants 
immediately they appear to have finished growth, for at this time the roots 
extend actively, throwing out laterals, thereby gathering strength to bear 
uninjured the strain of flowering. Such free-flowering sometimes suffers by 
exhaustion, hence the desirability of taking steps to counteract it. 
GENERAL REMARKS.—The work for the two months under consideration 
will consist largely of the general routine of potting, watering, cleaning, 
