206 THE ORCHID REVIEW. [SEPTEMBER, 1917. 
are about to produce new roots from the base of the pseudobulbs, which will 
occur soon after the flowers are faded. The newly-potted plants must be 
be kept on the dry side until the roots have freely entered the new compost, 
but shrivelling must be avoided by keeping their surroundings fairly moist 
and humid. This family of plants at the present day produces a succession 
of bloom the whole year round, and where flowers are required in large 
quantities there are none to compare with them for general usefulness. 
L2LIA ANCEPS and its varieties are now fast pushing up their flower- 
scapes, and when they attain sufficient length should be neatly staked, to 
prevent them from injury by touching the roof glass or getting broken. 
OncipIvMs also that produce their flower-scapes at this season will need 
attention as regards staking before they attain any great length. Slugs are 
very fond of these young succulent flower-scapes, and must be continually 
watched for, and, of course, destroyed. 
DENDRoBIUMS.—Plants of this genus should be gone through at 
intervals, and those that have completed their growth removed to cooler 
and lighter quarters, as advised last month. The amount of moisture, both | 
at the roots and in the atmosphere, must be considerably reduced, but dry- 
ness at the roots must be strictly guarded against. The resting period of a 
plant is as necessary to its full development as its growing period, and both 
must have proper attention if plants are to be kept in full vigour over a 
series of years. Plants that are still growing should have every inducement 
given them to complete their growth as quickly as possible. This may be 
attained by shutting up the house a little earlier, and exposing them to 
slightly more sun-heat. When their growths are completed they should 
be exposed to plenty of light and air to consolidate them. Sickly plants, I 
am fully convinced, are often due to their being coddled in badly-ventilated 
houses, combined with having too much water during the winter months, 
and not sufficient when well rooted and in full growth, a condition that 
applies to other genera. A fully-developed plant of the very commonest 
species is a delightful object. 
DENDROBIUM FORMOSUM, having finished growing, is about to expand 
its lovely white flowers. It blooms at a season when Orchid flowers are 
scarce, and is doubly valuable on this account, so that it should be grown 
freely wherever its requirements can be satisfied. The treatment required 
at this season is precisely the same as advised for D. Phalznopsis. They 
require plenty of heat, light, and moisture whilst making their growth, and 
a long dry rest in a lower temperature, but they must not be allowed to 
shrivel if the best results are to be attained. The evergreen Dendrobiums, 
as D. Farmeri, thrysiflorum, and others should received a reduced supply 
of water as they complete their growths, but must not be so severely rested 
as the deciduous species of this useful family of plants. 
