266 THE ORCHID REVIEW. [SEPTEMBER, 1900. 
When Lindley established the genus he added a Peruvian and a 
Brazilian species, these being based on old synonyms, and about a dozen 
others have since been added. There are now seven Brazilian species, 
six from Mexico and Central America, and one each from Peru and 
Colombia. The showiest species known is P. Lindleyi, Rolfe (Kew Bulletin, 
1893, p. 61), in which the flowers are larger and much darker in colour 
than in P. Loddigesii. It is a very floriferous and handsome plant.  P. 
Moorei, Hort. (Kew Hand-List Orch., ed. i. p. 189), is the same species. 
RACK, 
CALENDAR OF OPERATIONS FOR SEPTEMBER. 
By W. J. MorGan, Rann Lea Gardens, Rainhill, Lancs. 
GENERAL REMARKS.—AIll shadings should be removed by the second week 
in this month, as the sun will have lost its burning power. Canvas blinds 
should be dried and stored away for the winter; any patching can be done 
in spare time. Where the lath roller blinds are used they should be left on 
the houses for use in frosty weather. They will be found to make a con- 
siderable saving in the coal.bill, especially in snowy weather, when they act 
as a blanket, and it will not be necessary to force the fires. Where per- 
manent shading has been used it should be thoroughly cleansed off the 
glass. The down spouts into the tanks should be stopped up during these 
operations, as if allowed to run into the tanks it will soon cause an offensive 
smell, as well as mark the foliage if the water is used for syringing purposes. 
All the houses should be scrubbed down inside, and the bare walls lime- 
washed, as this always makes the houses lighter during the winter, especially 
lean-to houses. All pots and stages should also be scrubbed. Where coke 
is used on a double stage, this should also be washed through a sieve, and 
then the stone work swilled off with the hose pipe, which will help con- 
siderably in ridding houses of slugs, woodlice, &c., especially if the walls are 
washed down with hot lime. 
RE-STAGING.—-When re-staging the houses all plants should be put in 
their winter quarters, and be raised as near the glass as possible with safety, 
though if they are too near they are liable to get chilled when it is very cold 
outside. As plants finish up their growths they must be more carefully 
watered, but do not allow them to become dry enough to shrivel, or over- 
water them and cause spot. Try to get the happy medium. 
DAMPING DOWN will not require to be done so often now, though the 
houses should not be neglected. Always keep a nice buoyant atmosphere 
without getting the houses close and damp. If they are ventilated on every. 
favourable occasion they can easily be kept in good growing condition. 
INSECT PESTS.—Should any insect pests make their appearance the 
houses should be fumigated or sprayed lightly. It is better to do them 
