SEPTEMBER, 1923. THE ORCHID REVIEW. 283: 
new roots from the base of the growths. These should be potted into- 
larger pots, and given every encouragement to grow as quickly as possible. 
They will not make much growth in the winter, and will not require so 
much water at the roots or in the atmosphere as in the.summer, but they 
must not be rested until the flowering stage is reached, neither must they 
be allowed to become root-bound. Seedling Cymbidiums should be treated’ 
in a similar manner, very young plants should be potted in a mixture of 
osmunda-fibre or Atr-fibre, and sphagnum moss, while those further 
advanced in growth, and near the flowering stage, should be given a more 
substantial compost, one-third of the bulk should be Sega fo of good 
fibrous-loam with some crushed crocks incorporated. 
As the present month advances, we begin to think of shorter days and: 
less sunshine, this deficiency may be made up to some extent by gradually 
removing the permament shading. Some shade will be necessary, but it is 
impossible to give precise directions, for much depends on the kind of plants 
contained in the separate divisions. In all cases the reduction should be 
gradual, the object-being to cause the foliage to become hardened, so that 
little shading will be necessary after the end of the month, but the blinds 
should be used with discretion. The plants should be exposed to all the 
light possible without causing damage by scorching. The amount of 
atmospheric moisture must be regulated with extra care, and be reduced in 
each division. The cooler houses will require damping the least, as there 
will be less evaporation in these structures. In the warmer houses sufficient 
moisture must be promoted to counteract the effect of fire-heat, by damping 
down on mornings and afternoons. In the cool houses where little fire- 
heat is employed the floors and stages should be damped only in the 
mornings, except on bright days when rather more atmospheric moisture 
will be necessary. The watering of the plants must be regulated according 
to their various stages of development. Those with pseudo-bulbs near 
completion should receive a diminishing supply, but water must not be 
withheld to such an extent.as to cause shrivelling. As the nights become 
colder it will be necessary to provide extra fire-heat ; on warm days the 
ventilators should be opened slightly to prevent scorching, but retain as 
much sun-heat as possible. The ventilation of the Odontoglossum house 
should be carried out with great care at this season. During warm nights. 
the top may be opened slightly to admit the autumn dews that are very 
beneficial to Odontoglossums. 
—< 
CypripepiuM HarRrIsIaNuM.—The first hybrid Cypripedium appeared 
in 1869. It was raised from C. villosum fertilised with C. barbatum, and 
was named after Dr. Harris, of Exeter, the man who first gave to Dominy 
the idea of hybridising Orchids. 
