Nov-Dec. 1917:] . THE ORCHID REVIEW. 261 
every encouragement, and be given water at the roots whenever they 
become dry. C. insigne and its hybrids, which have been grown in the 
Cool house during the summer, will now do better if removed to a house 
where a few degrees more heat are maintained. 
EPIDENDRUM VITELLINUM.— This bright-coloured Orchid deserves to be 
grown in quantity. Both the spring and autumn-flowering varieties are 
desirable, as they supply a colour that is poorly represented in our 
- collections. The plants should be well supplied with water whilst making 
their growths, and after producing their flowers a partial rest may be 
allowed. A clean porous compost answers their requirements. The 
autumn-flowering variety has just passed out of bloom, and should for some 
little time be kept on the dry side. 
PLEIONES.—P. maculata, P. lagenaria, and P. Wallichiana, as they pass 
out of bloom, may be repotted. The treatment of these delightful little 
plants has been given so frequently in these pages that there is no need to 
repeat it. I mention them so that amateurs may know that the season has 
arrived when any necessary repotting may be undertaken. 
ZYGoPETALUM Mackayl, the best-known species of the genus, succeeds 
in a stove-like temperature, and is now sending up strong spikes of bloom 
Z. intermedium, crinitum, and the hybrid Z. Perrenoudii require the same 
treatment. When flowering is over, any necessary repotting should be 
done. Being free-rooting species, plenty of pot-room and a good depth 
of compost is required. A mixture of good turfy loam and osmunda fibre, 
with sufficient crocks to keep the soil sweet and open, makes a suitable 
compost. The pots should be well-drained, and care in watering is 
neccessary until the roots have taken hold of the new compost. 
Oncip1uMs.—The dwarf, yellow-flowered O. cheirophorum, with O. 
tigtinum and some late-flowering O. varicosum, are in bloom. They 
succeed well in the Intermediate house, and after flowering must be induced 
to rest, sufficient: water only being given to keep the bulbs firm and plump. 
There is no month in the year when some species of this large genus is not 
i bloom, and there is plenty of material to select from. 
GENERAL REMARKS.—Each species of Orchid has a proper season for 
fepotting, that is to say, a season when it suffers less from root disturbance 
than at any other, hence the necessity of repotting plants at the right time. 
Twould recommend all cultivators to study the roots and their action to 
the best of their ability, as I feel sure that they will find much to instruct 
and interest them. It is by these small things that plants teach us their 
kes and dislikes, and talk to those who are able to comprehend them. 
Many Orchids are ruined by an excess of water to the ae aoe gait 
; a 
_ little when in full growth, so that both the state of the plan 
ason of the year have to be taken into consideration. 
