68 THE ORCHID REVIEW _ [Marcu, 1916, 
loam, with all the fine particles taken out, mixed with some sphagnum 
moss and dried cow manure. The pots must be well drained, as they 
require an abundant supply of water when in full growth, and owing to 
their soft fleshy roots it is not advisable to pot them too firmly. Care. 
is necessary in the application of water until the plants have made consider- 
able roots in the new material. They require plenty of heat, but will not 
stand the strong rays of the sun, and therefore must have protection. 
THUNIAS require similar treatment, except as regards shading, for they 
require all the light and heat possible. It is needless to state that in both 
groups the bulbs and leaves should be thoroughly cleaned before being 
potted, and it is also a wise precaution to warm the compost before 
repotting plants that inhabit the warmer houses. 
PLEIONES.—P. humilis and any of the late-blooming section which 
have passed the flowering stage and commenced to grow, may now receive 
attention as regards repotting, should this be necessary. They are best 
grown in shallow pans, suspended from the roof. A similar compost to 
that used for Cypripediums will answer their requirements. P. maculata, 
lagenaria, and Wallichiana are now growing vigorously, and may receive. 
water whenever they become dry. If grown in a dry position these plants. 
are liable to attacks of red spider, and a slight spraying under their leaves 
on bright days will be beneficial. 
CATTLEYAS AND ALLIES.—There are now so many lovely plants which 
come under this head that one could fill the space at disposal every month 
with particulars dealing with these most gorgeous plants. C. labiata, 
Gaskelliana, and the innumerable hybrids which flowered during the 
winter months, may be repotted as soon as new roots are observed to be 
pushing from the rhizome. C. Percivaliana and Triane, shortly after 
they pass out of flower, will commence to push new roots, and should have 
attention. Many growers keep these plants in the same material for 
several seasons, but to my mind this is an error, as I find my plants are 
ready for new material each year, and when potted at that season when 
about to push new roots receive no check. Many amateur growers, I am 
convinced, kill these plants simply from the reason that they are afraid 
they may hurt them by repotting, but if they would pot them at their 
respective seasons, and treat as advised, Cattleyas would be as simple to 
grow as anything else. 
CyPRIPEDIUMS of the green-leaved section, as they pass out of flower, 
should be treated as advised in the January number. The secret of large 
fine flowers and robust plants of this large family is to keep their roots ip 
sweet and healthy material. I have previously remarked that loam in the. 
potting material can easily be used in excess. 
DeENpDRoBIUMsS of the nobile section will now be making a great show, 
