Nov.-DEc., 1920.] THE ORCHID REVIEW. 173 
and not sufficient during their growing season. Any that are in need of 
new material at the roots may still be taken in hand, but it is advisable that 
they should be pushing new roots when repotted, and that the new compost 
be afterwards kept on the dry side until the new roots have freely entered 
into it. Firm potting is necessary. These plants, although unable to 
stand direct sunshine, delight in abundance of light, hence the necessity of 
keeping the glass of the houses in which they are grown clean at this 
season. Sophrocattleyas, Brassocattleyas, and the many hybrids derived 
from intercrossing the allied genera, all succeed under the same conditions ; 
therefore there is no need to mention them in detail. 
ODONTOGLOossuUMs.— Plants of O. Uroskinneri, O. bictoniense, and others 
that are growing fast and pushing forth roots from the base of their growths, 
may be potted if necessary. These plants, having thick fleshy roots, 
should not be potted too firmly. O. grande, and those of a similar nature 
having completed their growths, and produced their flowers, should be 
gradually brought to rest, when only sufficient water to prevent shrivelling 
should be giventhem. This section of the genus requires a slightly warmer 
position than the O. crispum and O. Pescatorei section, and therefore 
should be grown at the warmest end of the house. 
Oncipiums, such as O. varicosum, O. Forbesii and others, that have 
been growing in a cool temperature, and are pushing up their flower spikes, 
will be better for a little more warmth, which will assist them in developing. 
their flowers, and thus a position in the Intermediate house is desirable. 
In a low temperature there is a danger of the buds turning yellow and 
dropping off, and I find that if placed in more favourable conditions the 
flowers are finer, and open readily. 
PHALZNopPsIS will now be showing their flower spikes. They give very 
little trouble where the structure is a suitable one. They should always 
occupy the warmest house, hence the reason that they are not seen as 
much now as in the past, when fuel troubles were not as prevalent as they 
are to-day. They are best grown suspended from the roof, at a sufficient 
distance from the glass to prevent the cold from. injuring them. These, 
like many other Orchids, are best kept on the dry side during the cold days 
of winter. 
Mexican Laias.—These, like Cattleyas, enjoy light, especially whilst 
making their growths, and delight in fresh air whenever the outside 
conditions will allow of it being admitted. The early varieties will soon be 
opening their flowers; others are naturally later, and by judiciously 
manipulating them, the blooming period may be considerably extended. 
L. autumnalis and its chaste variety alba, with L. albida, and L. furfuracea, 
will also be in bloom. These like to be kept slightly cooler while making 
their growth, also the now scarce L. majalis, which does best when 
