248 THE ORCHID REVIEW. 
however, that one can succeed in growing it well. The conditions under 
which Disa grandiflora thrives best are so delightfully simple and easily 
obtainable that ‘its cultivation is always well worth a trial. The chief 
points to keep in mind are as follows:—a cool, moist frame or pit during 
summer, during which time they should never be allowed to become dry for 
the want of attention, nor burnt for the want of shade and air. About 
now they bloom, and, immediately the flowers are over, divisions of the 
roots, or re-potting, should take place when needful, employing sandy peat 
for this purpose. Let them still occupy their cool, moist frame or pit 
until the nights are too cool for them to remain longer, when they should 
be taken to winter in a house where the temperature averages from 40 to 50 
degrees. From the time they bloom in August or September until the 
ensuing winter is past, but little water at the root will be required, enough 
only to keep them plump and healthy. Be careful to keep yellow thrip 
away by the use of a little tobacco powder. When once the proper 
treatment is rightly hit upon, Disas grow and propagate very freely, as the 
offshoots, which are always plentiful, may be removed from the parent 
tuber and potted off in small pots. 
The present season is a good one for doing up the various species of 
the cool Orchid-house which have not yet been done. Odontoglossum 
Rossii and O. Cervantesii are two very pretty species, which pay to grow 
well, so that they bloom profusely; otherwise, with individual flowers here 
and there only, they are too little to make a show. Both species suffer 
greatly from too much meddling with at the root, and, on this account, 
they should hardly ever be re-potted. If re-potting is contemplated, it 
should be performed not later than this month, and the greatest possible 
care taken not to disturb or break the roots more than is necessary. If 
the stages are pretty near the roof glass, they grow well there in small 
pots, otherwise they are better in pans, and suspended. What little 
compost is required about their roots should be mostly all fibrous peat, 
which will not decay so quickly as moss. They delight in a cool, airy 
atmosphere, and require but little water at the roots at any time of the 
year. The above remarks, so far as they refer to matters of re-potting, 
apply also to the other chief inmates of this department, which are 
principally Oncidiums and Odontoglossums. Let the roots be preserved 
in a sound and healthy condition by sensible and discreet watering, and 
then but little re-potting is necessary. Of course, throughout the growing 
season, a good deal of moisture is indispensible about these cool Orchids, 
as well as the warm ones. The compost should not, however, be soddened 
by being water-logged, as it turns the compost sour and makes it decay, 
_ and the roots of the Orchids perish. 
Cattleya citrina is just now commencing to grow. It does well either 
