22 THE ORCHID REVIEW. [JANUARY, 1915. — 
watered till the flowers fade. Species that have bloomed recently, as C-. 
Rossiana, C. graminifolia, C. sulphurea, and C. Cumingii may be repotted | 
if they require it. Plants of C. flaccida (Intermediate house), C- 
Massangeana, and C. tomentosa (Warm house) are at rest, requiring very 
little water at the root before the flower spikes appear, or growth 
recommences. 
ZYGOPETALUMS.—Such Intermediate house plants as Zygopetalum — 
Mackayi, Z. crinitum, the rare Z. Ballii, and others of this section should | 
be repotted, if necessary, as they pass out of flower. As the two former 
species produce numerous large Cattleya-like roots, they need rather large 
pots, which, it is very important, should be well drained. Fibrous loam, 
chopped osmunda fibre, and sphagnum moss, in equal proportions, with 
plenty of broken crocks, well mixed together, form a suitable compost for 
all of these species and their hybrids to root in. Such scandent-growing 
species as Z. maxillare, and its variety Gautieri, with the rare white-lipped — 
Z. Sanderianum, should now be attended to, as they will be starting into — 
growth. Avoid disturbing these plants more than necessary, for if once 
they are removed from the blocks of tree-fern stems, or whatever their 
roots may be clinging to, they are not very easy to re-establish. A good 
method is to firmly fix a new piece of tree-fern on to the top of the old 
piece, and the young-growing rhizomes quickly take hold of the added — 
portion. These plants when well flowered, are always appreciated, and: : 
the flowers, even when cut, last a long time in good condition. These — 
Zygopetalums grow freely when suspended well up to the roof glass in a4 
moderately-shaded position in the Intermediate house, and kept well a 
supplied with water at all times, which may easily be done by lightly 
spraying them overhead every morning, and again early in the afternoom 
when the weather is fine. 
obtain a foothold in the young growths it is difficult to eradicate them, and 
the fresh green-growing shoots become irretrievably ruined, therefore all : 
through the growing period these destructive insect pests must be - 
persistently sought after and destroyed. Whether thrips be present oF 
not it is advisable that whenever a house is being vaporised the plants 
should be subjected to the fumes, as this will check and prevent their — 
increase. This practice cannot be too deeply impressed on the mind of the — 
young beginner, because if such work is neglected until the young growing 
shoots become infested with these tiny 
from their attack. 
CooL HouSsE.—Plants of Odontoglossum Edwardii, or of its hybrids, 
which have recently bloomed and are starting well into growth should be 
If such plants as are well established, having sufficient 
attended to. 
rooting space and the drainage ascertained to be in good condition, a top~ 
Thrips are their greatest enemies, and once they — 
insects, the growths seldom recover 
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