JAN.-FEB., 1920. | THE ORCHID REVIEW. 15 
which produce thin roots, and are delicate growers. The Brassocattleyas, . 
and the numerous Cattleya Dowiana hybrids are examples of the thin- 
rooting section, but there are many others. Plants which produced flowers 
during the late autumn and winter months may have fresh material- 
afforded them, as soon as new roots are observed to be pushing from the 
base of the last made pseudobulb. The majority of these plants produce 
new roots twice a year, and may be repotted at either season, but 
preferably in the spring. A clean open material, made up of equal 
portions of peat, Ar and osmunda fibre, and sphagnum moss, answers 
their requirements, and the plants should be potted firmly. The later- 
flowering varieties may be done when their flowering period has passed. 
L#@LIA ANCEPS and its varieties are now flowering freely, and make a 
most attractive display, and coming when Cattleyas are somewhat scarce, 
are most useful and acceptable. After flowering, the plants should be kept 
moderately dry until new roots are observed to be pushing from the 
rhizome, when any necessary repotting may be undertaken. Coarse 
osmunda fibre makes a suitable compost, which should be thoroughly 
cleaned and placed in the receptacles quite firmly. Before being repotted, 
the plants should be thoroughly cleaned. 
ODONTOGLOssuUMs will now be in all stages of growth; some just 
starting, others in full growth, whilst some are pushing up their flower 
spikes. The latter should be carefully and neatly staked as they attain 
sufficient length. Flowering plants are best placed by themselves, so that 
they can be examined from time to time for the presence of slugs, which 
devour the spikes and do irreparable harm. Small or weakly plants should 
have their spikes removed as soon as they are observed, as the production 
of flowers may mean the death of the plant. Should any plant be in need 
of fresh material, and its new growth in the desired condition, namely 
some few inches in height and about to push roots, it may be repotted. 
A compost of equal portions of peat and Ar fibre and sphagnum moss, to 
which some broken leaves may be added, will answer their requirements. 
Newly potted plants at this season must be watered with extreme care. 
CyMBIDIUMS, both species and hybrids, should have attention at the 
roots as soon as their flowers are over, should they be in need of it. As 
they resent root disturbance, this operation should only be performed when 
the compost becomes exhausted. A compost in which fibrous loam, of a 
lasting nature, is the main constituent, answers their requirements. The 
material should be made moderately firm, and water applied with care for 
some considerable time after repotting. _ 
ONCIDIUMs thrive in a similar compost to Odontoglossums, and as they 
resent a sour, decayed compost, any that are in need of new material may 
have attention. The smaller kinds are best grown in shallow pans, 
