290 THE ORCHID REVIEW. [DeceMBer, 1916. 
a.moderately damp position in the warm Cattleya house. Water should 
now be applied with extreme care, and they should be allowed to get dry 
between each operation. Should black thrip, their greatest enemy, attack 
them, it is a sure indication that the atmospheric conditions are not to 
their liking, and plants growing under unnatural conditions are more liable 
to be infested with insect pests or other diseases. Weak plants will often 
throw up their youny leaves enfolded together, and these must be carefully 
liberated, or the new growth will be deformed. The sheath at the base of 
the young growth will often hold water, and if unattended to may be the 
means of the young growth decaying. Such sheaths are best removed as 
early as possible. 
Mexican La@iias.—Lelia anceps and its varieties are indispensable 
where flowers are required in quantity at the festive season. The varieties 
are well known, and the typical form is acceptable as a cut flower at this 
season. The beautiful L. autumnalis and its lovely white variety should 
also be included. These require water in moderate quantities until their 
flowers are fully open, and after flowering water may be almost withheld, 
but under no consideration must the pseudobulbs be allowed to shrivel. 
The plants may be repotted in the spring whenever root action becomes 
active. They succeed in the Mexican or cool Cattleya house temperature 
whilst in bloom, and require a dry atmosphere at this season. 
CATTLEYAS AND ALLIES.—With Cattleya labiata and its varieties over, 
we have to depend upon the many fine hybrid Cattleyas, Lzliocattleyas, 
and others which produce their flowers at this season. Little water is now 
required. Cattleya Warneri, which flowers in the spring, will soon be 
showing signs of activity by pushing roots and growth freely. They should 
be placed in a light position, well up to the glass, and receive water when- 
ever they become dry. Those in need of new material may have attention 
whenever the new roots are observed to be pushing from the rhizome. 
Other plants in the Cattleya house which are in various stages of growth, 
including Lelia crispa, purpurata, tenebrosa, and many others, must be 
watered with discretion at this season, Lelia harpophylla, whilst in full 
growth, and until the flowers are past, will require water whenever it 
becomes dry, when much less will suffice, and the plants should be induced 
to rest by placing them in cooler quarters. 
L&LIA PUMILA, and other plants which succeed in the Cool house 
during the summer months and the Cool Intermediate house during the 
winter, may be repotted, if necessary, as they pass out of flower and 
root action commences. They delight in small shallow pans, small 
quantities of potting material, and only sufficient water to keep them 
plump and healthy until growth becomes vigorous. 
CYPRIPEDIUMs will now be flowering in quantity, and a house of the 
