x06 THE ORCHID. REVIEW. (APRIL, 1910. 
mobile shape, and more or less of the maroon disc, but the ground colour is 
‘buff yellow, except the right and left hand flowers of the upper row, which 
are primrose. Both the yellow and the maroon vary in depth of tint, and 
‘the latter also somewhat in amount, this detail being less distinct in the 
figure than could be wished, because of the position of the lip. Had both 
‘the parents been hybrids it is probable that the range of variation would 
dhave been greater, and it will be noticed that none of the seedlings reverted 
‘to purple, though the centre flower showed a slight trace of this colour at 
the apex of the petals and dorsal sepal. Some day we hope to be able to 
figure a group showing a greater amount of dissociation of the original 
‘specific characters. Such a group could best be selected from a batch of 
-seedlings derived from two primary hybrids in which four dissimilar species 
were represented. 
CALENDAR OF OPERATIONS FOR APRIL. 
By W. C. Price, Oakdene, West Didsbury. 
“TEMPERATURES, when the sun is shining, may be allowed to rise five degrees 
-or so above the figures given last month, but must not on any account be 
run up with fire-heat. They must be governed by the mildness of the 
weather. The amount of moisture must be increased to meet requirements, 
and care should still be taken with the ventilation. The top ventilators 
‘should only be used when favourable conditions prevail, but the lower 
ventilators should be partially opened early in the morning, and opened 
wider as the temperature rises, so that there is no sudden drop by having to 
-open them all at once. On mild nights the lower ventilators may be left 
‘open about an inch, as it helps to keep a free circulation, and the houses do 
not feel so stuffy the first thing in the morning as they do sometimes when 
-shut right up on a mild night. 
ANGULOAS are now pushing their young growths and flower buds, which 
appear together, and if repotting is required, it should be done as soon as 
ithe new growth is seen. Repotting can then be done before the roots are 
advanced enough to be damaged by the operation. Use a compost consist- 
ing of one-third each of good fibrous loam, peat, and sphagnum moss, with 
a good sprinkling of coarse silver sand, all mixed well together. Use pots 
large enough to last them two years ; put about one inch of clean crocks at 
the bottom for drainage, and pot moderately firmly. Bring the compost 
just to the base of the bulbs, as it is very important that the young growth 
should not be below the surface. Leave about half an inch of space below 
the rim of the pot so as to allow for watering. They should be very 
‘sparingly watered after repotting, but when well rooted they require copious 
supplies till the bulbs are fully matured. We find that they grow and 
flower admirably at the warm end of the Intermediate house. 
CaTTLEyAs.—C. Warscewiczii (gigas) and its varieties imperialis and 
