June, 1913.] THE ORCHID REVIEW. 183 
species enjoys the stronger will the growth be when the season of activity 
commences. For some weeks it will only be necessary to keep the compost 
moist, but on no account must the plants be allowed to suffer for want of 
moisture either at the roots or in the atmosphere. In damp and cold 
localities the cool Intermediate house is the best place for this Orchid at 
this season, but in more favoured districts the warm end of the Cool house 
is more suitable. The hybrids, M. Bleuana and M. Hyeana, should always 
be given a position in the Intermediate house. They make their growth in 
the same way as M. vexillaria, and require similar treatment, with the 
exception of temperature. They thrive in a slightly higher temperature 
than M. vexillaria at all seasons. 
CypRIPEDIUMS.—Such plants as C. bellatulum, b. album, niveum and 
concolor, with their hybrids, C. Boltoni, Venus, Mrs. E. V. Low, Vipanii, 
and others that have recently flowered, should be repotted if necessary. Well- 
tooted specimens in good material, and with room to develop, should not be 
disturbed. These plants are best grown in pots, which must be provided 
with ample material for drainage purposes. They are often considered 
difficult to cultivate, which is usually attributable to faulty treatment. 
Failures are often caused by the excessive use of the water pot, especially 
during the winter months. Many succeed in growing these plants in a 
compost in which loam preponderates, but I find they thrive quite satis- 
factorily in a compost made up of two parts peat fibre, one part loam 
fibre, and sphagnum moss, with some small pieces of mortar rubble added. 
The plants must be potted rather firmly, and should be elevated close to 
the glass in a warm Intermediate house. The greatest secret as regards the 
successful culture of this plant is to give water at the roots only when really 
dry, and never to apply water overhead. 
ODONTOGLOssUM cITROSMUM and O. URosKINNERI.—Plants of these 
Species may be repotted as they pass out of bloom, should they require ‘it. 
The pots must not be too large, and the drainage must be perfect, the pots 
being quite half-filled with clean crocks. The usual Odontoglossum 
compost is quite suitable, and the plants must be potted quite firmly. O. 
¢itrosmum thrives suspended quite close to the roof of either the Cattleya 
or Mexican house, whilst O. Uroskinneri will succeed best at the warm 
end of the Cool house. 
Ca:LoGcynrs.—Such plants as C. asperata, and others that flower at this 
season, should be repotted, if necessary, when their growths are well 
advanced, and about to push forth roots. Owing to the immense quantity 
of water these plants take up when in full growth, the pots or pans used 
must be well drained, and the compost must be placed around the plants 
moderately firmly. They should be grown in a warm humid corner of the 
East Indian house, and be well shaded from strong sunshine. The species 
