DECEMBER, 1915.| THE ORCHID REVIEW. 363 
will be warm enough for the present, and until the buds are fully developed, 
when removal to the lightest position available in the East Indian house 
will be a suitable change, and will assist further to open the blooms. After 
removal from the resting-house, water must be applied at comparatively 
long intervals, as any undue excitement while the flower buds are developing 
frequently causes the new growths, now visible at the base of the pseudo- 
bulbs, to break away, and prevents the flower buds from coming to perfection. 
These remarks apply particularly to D. Falconeri, D. Wardianum, and 
their hybrids, plants of which have for some time been resting in a 
‘temperature of about 50°, or a little less at night. These for several 
weeks past have shown flower buds at the extreme end of the pseudobulbs, 
and if the plants had been put into extra warmth earlier, these buds would 
not have developed properly or would have gone off prematurely. 
Where many plants of D. nobile are grown, flowers may be obtained 
during several months by placing the earliest in a cool dry house to rest, 
and, as soon as the growths are fully matured, bring them into gentle 
warmth as flowers are required. There are many species of Dendrobium 
which bloom later in the spring, as D. Parishii, Bensonie, albosanguineum, 
superbum, and its several beautiful varieties. These, and many others, 
having completed their current season’s growths, should be placed high up 
in the Cattleya house during their season of rest, and all of them should be 
kept as dry at the root as possible, until their flower buds show, when they 
may be removed to the East Indian house. 
ZYGoPETALUMS.—Z. Mackayi generally does best in a warm stove-like 
temperature, and at this season is sending up strong spikes of bloom. 
When flowering is past, or the spikes are cut, the plants may be repotted 
if necessary, and as it is a free, deep-rooting species, plenty of pot room and 
a good depth of compost is required. The’ pots should, therefore, be filled 
to about a quarter of their depth with drainage materials, and a mixture of 
good turfy loam and osmunda fibre; with plenty of crocks mixed In, will 
form a suitable compost. Pot the plants with the compost up to within vit 
inch of the top of the pot, then take a portion of the compost and mix with 
ita moderate quantity of chopped sphagnum moss, and this should be used 
The rare Z. Burkei, now about to flower, — 
the same treatment. Still more rare is the beautiful Z. Ballii, also 
flowering, and this requires the cooler temperature of the Intermediate 
house. Other kinds that thrive best in a cool shady «orner of the 
Intermediate house are Z. crinitum, Perrenoudi, intermedium, cnee 
anum, brachypetalum, leucochilum, Armstrongii, Brewii, Gottianum, ae 
the rare Z. Lindenii. They should be repotted soon after ee 
commences in the same compost as that advised for Z. Mackayu. is 
fostratum is a fine species that requires a rather warm temperature. 
as a surface dressing. 
