172 THE ORCHID REVIEW. [JUNE, 1903. 
Barringtoniz, mesochlena, costata, Cobbiana, etc., which may all now 
be attended to. 
Oncidium tigrinum produces better results when grown in an inter- 
mediate temperature than when subjected to cool treatment. It has 
been resting since maturing its bulbs last season, but is now beginning to 
grow again. Until the flower spikes appear in the young growths, no 
large quantities of water should be given. When these are seen, fresh 
material may be supplied if a shift is not required intoa larger pot. After- 
wards more water may be given, though those that have been disturbed 
should have less frequent applications than those only re-surfaced. 
As soon as Dendrobium thrysiflorum, densiflorum, Farmeri, clavatum, 
moschatum, and others of this section, have gone out of bloom, they 
will soon commence to grow, and when the elongation of the young 
bulbs has reached the foliage stage, roots will appear at the base, and 
any re-potting or top-dressing should then be done. The best fibrous 
peat should be used, with a small proportion of clean living sphagnum. 
The quantity used to each should only be about two inches in depth, 
the remainder of the receptacle being filled with clean drainage. Secure 
the bulbs to a stake or two placed in the middle of the plant to keep 
it in shape, and water sparingly until the roots have worked their way inte 
the new compost. D. Falconeri should be grown in an airy part of the 
Cattleya house, either on a block or raft, or in shallow pans or baskets. 
In either case little material should be used, for although abundance 
of water is required during the growing season, these plants do not 
like a soddened base. The small leaves of this lovely species are very 
subject to the attacks of red spider, and to keep this pest at bay the plants 
may be sprayed frequently. Re-potting is very seldom necessary, as 
its mode of growing is more of a branching character than an extension at 
the base. Fresh material should however be added, where any of the old 
can be picked away without damaging its very fine roots. D. chrysotoxum 
and suavissimum flower and proceed to make new growth almost at the 
same time, but little root action takes place until the flowers are over, when 
potting or other requirements may be attended to. These enjoy a short 
quick growing season, and afterwards a long rest. 
Sobralias now take a more exalted position among Orchids, since 
the introduction of so many lovely species and varieties as leucoxantha, 
Lowii, Lucasiana, xantholeuca, and the white forms of macrantha. They 
flower at various times of the year, and consequently the bulk cannot 
be re-potted at the same time, and for this and other reasons each must be 
studied separately, and operated upon when in a suitable condition, and 
this is generally a few weeks after the plant has flowered. The majority of 
these grow well in a warm Intermediate House, or the coolest part of the 
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