54 THE ORCHID REVIEW. [FEBRUARY, I913- 
‘new rooting material they may have attention, but the best season for 
,potting these plants is immediately after blooming. 
Mexican Laias that are in need of new compost should have attention 
as soon as the new roots begin to push. 
CYPRIPEDIUMS, as they pass out of flower, should be repotted if the 
-compost is at all decomposed, or if the plants are in need of larger pots. 
The compost given last month will answer their requirements. 
DENnpRoBIUMS of the nobile section which are showing for flowers may 
have water afforded them in more liberal quantities as soon as the flower 
‘buds are about half developed. It is a good practice to thoroughly clean 
-and overhaul these plants before the flower buds get any size, as there is 
danger of many getting damaged in the operation. These plants open 
‘their blooms quite satisfactorily in a temperature of about 60°. In a lower 
temperature the flowers are stunted, and in a higher one they are forced 
-out too quickly. Among present day growers these Orchids appear to have 
lost favour, from what reason I am at a loss to understand, as, when in full 
bloom, if well grown, there are few things to compare with them for effect. 
CyMBIDIUMS, that are pushing up their young growths, and any others 
‘that are in need of repotting, should be attended to when they are seen to 
be pushing new roots from their base. They do not like disturbing, and if 
the compost is not decomposed, and there is room for the new bulbs to 
develop, it will be wise to defer this operation until next season, as they 
bloom more freely when in a pot-bound condition. The species and hybrids 
-of this useful genus delight in a cool position in the Intermediate house, but 
must not be subjected to the direct rays of the sun at any time. Red spider, 
which sometimes attacks the leaves, especially if grown in a dry position, 
must be destroyed by sponging from time time with a weak solution of 
insecticide. These plants will succeed in a similar compost to that used 
for Cypripediums, and should be potted in the same way. Those that are 
now pushing up their flower spikes may have attention at a later date. 
They should have water afforded them whenever they become dry. 
OncipiuMs of the winter-flowering varieties, as they commence to grow 
and produce roots, may be repotted. It is essential to keep the rooting 
material in a sweet and healthy condition, and if the compost is worn out 
it is advisable to renew it. The compost used for Odontoglossums_ is 
-suitable, and is made up as follows: peat, polypodium, and osmunda fibres, 
and sphagnum moss in equal proportion, with a moderate quantity of leaves. 
They are best grown in shallow pans suspended from the roof. Most of 
‘these Oncidiums enjoy an Intermediate house temperature, but such species 
as O. Papilio, Kramerianum, Lanceanum, and Cavendishianum do best in 
the Warm house. 
Mictonias.—Plants of Miltonia vexillaria, M. Bleuana, and M. Hyeana 
