210 THE ORCHID REVIEW. [JULY, 1915, 
M. rosea itself is very rarely seen. We believe that it requires particularly 
cool treatment during the summer months, for it occurs at a high altitude 
in Ecuador, and this particular specimen was grown outside from May to 
‘October in a cool shady place, protected by a canvas screen. In any case 
‘the species has disappeared from some collections where other Masdevallias 
‘are successfully grown, and it would be interesting to know the reason 
M. rosea is a native of the Eastern Andes of Ecuador and’ Colombia, 
growing at an altitude of about 9,100 to 10,400 feet. Consul Lehmann, to 
‘whom we owe its introduction to cultivation in 1879, states that it grows on 
trees in dense and damp woods, in a mean annual temperature of from 50° 
to 54° Fahr. It was originally described by Lindley from dried specimens 
collected by Hartweg, about the year 1843. 
By W. H. Wuite, for many years Orchid 
late Sir ‘lrevor Lawrence, Bart., K 
F CALENDAR OF OPERATIONS FOR JULY. j 
Grower to the 
-C.V:0, 
wr such warm weather as has prevailed during the past few week 
scarcely any fire-heat will be needed in the day time in either 
division. In the East Indian house the hot-water pipes should, by night, 
be made only just luke-warm, to assist in promoting a genial growing 
temperature, and to cause the air and moisture to circulate freely amongst 
the plants, and thus prevent spot occurring from the damp atmosphere 
The temperature at night should be kept as near to 70° as possible, and the 
lower ventilators should be left partly open whenever the weather is 
suitable. 
In the Cattleya house very little artificial heat will be needed at night 
if the inside temperature keeps a trifle above 60°. Should, however, the 
external air become damp and chilly, it will be advisable to make the pipes 
luke-warm, otherwise the young growths of some of the Cattleyas and 
Lelias may damp off. Afford the inmates as much fresh air as _ possible by 
night as well as by day. These remarks apply also to the Mexican house. 
The Intermediate house will need scarcely any fire-heat from this time, but 
a free admission of air is necessary at all times. 
The Odontoglossum house must also be freely ventilated, and, with the 
exception of a few hours during the middle of the day, the atmosphere 
should be kept well charged with moisture. Keep the plants well shaded 
so long as the sun shines upon the roof. On span-roofed houses, fully 
exposed to the sun all day, it is advisable to keep the temperature as low 45 
possible, and where lattice-wood blinds are in use, it is beneficial to 
supplement them with ordinary garden mats, placing these upon the glass 
so that a current of air passes between them and the blinds.. If the sut 
dhe teense eiabaeea Lil 
to Ss a eee 
