0. membrcinaceum has no difference in the flower, but only 
varies in the colour of the pseudobulbs. 
As to the temperature of houses in which Odontoglossa 
may be grown, we find that the minimum temperature of Mr. 
Anderson’s house during the year varies only from 48*70° to 
56*30°; the maximum temperature varies according to sunshine 
from 5° to 20°, but, as he justly observes, “the minimum is of 
infinitely more importance for the amateur to study; for plants, 
like animals, to be in a thriving condition, must have a diurnal 
repose.” 
