150 THE ORCHID REVIEW. 
‘ Cavendishianum, O. Lanceanum, O. Papilio, O. Kramerianum, and O. 
splendidum, and this should be suspended in a very light position. I think 
this may apply generally to Oncidiums having thick fleshy leaves, as they 
like plenty of light, and in many cases actual sunlight. Oncidium Jonesianum 
is remarkable for its very rapid deterioration. The first few importations 
vanished almost as quickly as they appeared, and the secret of successful 
cultivation has still to be learnt. From my experience I believe that heat 
and strong light are necessary during growth, the plant afterwards being 
rested in a dry intermediate temperature. 
New live compost should be applied to its roots each year, or if grown 
on a block, which seems to be most natural, as it always grows downwards, 
like Cattleya citrina, it should be transferred to a new green block each year. 
Most of the Oncidiums, however, like the coolest house, and delight in the 
same treatment as Odontoglossums; and among the cool-growing Oncidiums 
may be mentioned the following, all of which are well worth growing :— 
Q. concolor, O. curtum, O. Forbesii, O.crispum, O.cucullatum, O. dasytyle, 
OQ. Garderi, O. Marshallianum, O. varicosum, and O,. cheirophorum. All 
these should be grown in small pans or baskets and suspended from the roof. 
The last-named species succeeds best if removed to the intermediate house 
for the winter. O. tigrinum, O. macranthum, and O. superbiens are best 
grown in pots on the stages. O. ornithorrhynchum, O. unguiculatum, O. 
incurvum, and O. Leopoldi grow well in the cool house in the summer, but 
are best removed to a warmer house for the winter, and this remark applies 
to most of the intermediate growing Oncidiums and Odontoglossums. 
Odontoglossum Cervantesii is a charming little Orchid when grown in 
small hanging pans, and, like O. Rossii, must be placed at the coolest end 
of the house. In fact, most of the Odontoglossums are very cool-growing 
Orchids ; but there are exceptions, some few of them requiring intermediate 
temperature, as QO. Harryanum and O. cirrhosum. This latter is one of 
the most handsome, but it is not one of the easiest to grow. O. CErstedii 
also requires some warmth to grow it well, as do O. Reichenheimii, O. 
Schleiperianum, O. Williamsianum, O. grande, O. Insleayi, and O. 
citrosmum, which are best left in the intermediate house. O. Londes- 
boroughianum should be given a position close to a ventilator in the 
Mexican house where it gets full sunshine. 
When writing of Miltonias, I omitted to mention that exceedingly 
pretty species, M. Phalznopsis, which is now in bloom. It should be 
grown in pans or baskets and suspended in the intermediate house during 
summer. I have grown it well in the cool house, but advise a little 
warmer treatment. In the winter it should occupy a position in the 
‘warmest part of the intermediate house, otherwise it will not bloom 
satisfactorily, and the foliage will become spotted. 
Trichopilias are interesting Orchids, but if treated too cold do not grow 
