236 THE ORCHID REVIEW. [AUGUST, IgIo. 
until the flowering season is over, O. Forbesii requires similar treatment, 
but is not so far advanced, as its flowering season follows after the varicosum 
section. 
Another useful Oncidium for autumn and winter flowering is O. tigrinum, 
with its fine branched spikes of yellow and chestnut brown flowers. It 
lasts weeks in perfection, and is very useful for decorative purposes. It 
should be grown at the cool end of the Intermediate house. O. incurvum, 
with its pretty white and purple flowers and graceful spikes, is another 
autumn-flowering plant that should be in every collection. The spikes are 
now coming up freely, but patience is required in waiting for them to open, 
for they take a long time from the appearance of the spikes until the 
flowers expand. O. pulvinatum must be divided into two sections, the 
winter-flowering and the summer-flowering. The summer-flowering type 
should have the supply of water reduced as soon as the flowers are off until 
the young growths are well away, but should not be allowed to get dust dry, 
otherwise the treatment recommended for O. bicallosum will suit them, 
except that they should be grown at the warm end ofthe house. The winter- 
flowering type is now growing strongly, and requires copious supplies of water. 
PERISTERIA ELATA will now be throwing up flower-spikes, and requires 
abundance of water. Alternate waterings with liquid cow manure until the 
spikes are off will be very beneficial, but should be given very weak, or the 
flowers will become a dirty white instead of being a clear waxy white. The 
flowers are also much clearer and last longer if the plants are shaded whilst 
in flower. 
SOBRALIAS will now have finished flowering, and any requiring repotting 
may now be attended to. A good compost for them consists of one-third 
each of good fibrous loam, broken up roughly, peat, and sphagnum moss. 
Pot moderately firmly and water carefully until they are well rooted. If 
an increase of stock is desired, they are easily divided with a sharp knife, 
leaving four or five reeds to forma plant. Pot them in the usual way, and 
they will soon send up young growths. Care should be taken when potting 
not to break more roots than can be helped, as they are very brittle. 
SOPHRONITIS grandiflora and its varieties coccinea, purpurea, and rosea 
are now ready for repotting, if requiring new material. We find that they 
do well in a compost consisting of one-third each of Osmunda and poly- 
podium fibres and sphagnum moss, well mixed together. Pot moderately 
firmly in shallow pans, and suspend from the roof of the Cool house. 
Water carefully till well rooted. Unless the compost is decayed, or the 
centre of the plant bare, they are best left alone, as they do not like to be 
disturbed too often. When repotting, room enough to last them three or 
four years should be given, but do not allow too much, as they grow very 
compactly and do not spread very rapidly. 
