146 THE ORCHID REVIEW. [May, 1912. 
are now pushing up their flowers within the sheaths, should be thoroughly 
cleaned and the flowering growths neatly staked up. A house should, if 
possible, be devoted entirely to plants in flower, where a slightly lower 
temperature and a drier atmosphere may be maintained, which will be the 
means of the flowers lasting longer, and afford more enjoyment to those 
who wish to inspect them. Push on with the repotting of any of this family 
which may require it, on the lines laid down last month. Where a collec- 
tion of species and hybrids of this most beautiful group is grown, something 
or other will nearly always be in the condition when repotting will be bene- 
ficial. To successfully cultivate these plants, I am fully convinced that 
they must have a sweet rooting medium, and many deteriorate through the 
compost being allowed to get into a decayed condition. 
DENDROBIUMS.—The evergreen species which flower at about this 
season comprise such beautiful and attractive plants, as D. densiflorum, 
Farmeri, thrysiflorum, moschatum, Dalhousieanum,  fimbriatum, 
chrysotoxum, Bronckartii, and several others. All are free-growing 
plants that can be accommodated in an ordinary plant stove during the 
summer months, whilst making their growths, and rested during the winter 
in a warm greenhouse, where the temperature does not go below 55°. 
These plants usually commence developing their new growths and flower 
spikes simultaneously, and by the time the flowers are past the young 
growths are somewhat advanced in making roots from their base. At this 
stage any necessary repotting should be attended to. They all may be 
cultivated in pots, and require a position where they get plenty of light, and 
only require protection from the direct rays of the sun during the hottest 
part of the day. 
DENDROBIUM PHAL&NOPSIS, and other species of this section, may also 
have attention in the same way, providing the young growths are seen to 
be pushing new roots. These plants should always be grown in shallow 
pans, as the best results are obtained when they are restricted as regards 
rooting space. The compost as advised last month for Dendrobiums will 
answer their requirements. The usual precautions as regards watering 
newly-potted plants must be adhered to. 
DENDROBIUM FORMOSUM is a very useful Orchid where there is a great 
demand for choice white flowers in the autumn. The plants which are now 
commencing to grow should be treated as advised for D. Phalaenopsis. 
Both species delight in plenty of heat and light when in full growth, and an 
abundant supply of moisture both at the root and in the atmosphere. D. 
infundibulum and its variety Jamesianum are also growing and making new 
roots, and may be repotted should they require it. This species succeeds 
grown in the same way as the preceding, with the exception that it delights 
in a cool intermediate temperature instead of a warm one. 
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