252 
THE FLORIST AND POMOLOGIST. 
[ November, 
Orchids are subjected. Among those best adapted for cold treatment are Odoti- 
toglossums, Oncidiums such as 0. macranthum , 0. serratum, 0. cucullatum , 0. nubi- 
genum , and many others too numerous to mention here ; Disa grandijlora and many 
other species as yet unintroduced ; and last, but not least, the Masdevallias. Most 
of the species of the latter genus bear comparatively large, brilliantly-coloured 
flowers,—some of a glowing scarlet, like a bar of red-hot iron ; others of the softest 
silvery lake, purple, red, yellow, green, or of the purest white ; and the plants 
themselves are of remarkably free and rapid growth when cultivated in a cool, 
moist temperature. 
We find fifty or perhaps more species in books and herbaria, but many have 
yet to be introduced to this country. On the highlands of Peru they attain to 
an altitude of 9,000 ft. to 10,000 ft. above the sea-level, and are exposed to varied 
and often very sudden changes of temperature. In growth they are neat and 
compact, occupying but little space, and they last in flower for several weeks, or 
