. be entertained of its inhabiting a damp, cool, shady situa- 
tion. This certainly reveals the secret of its cultivation, and 
shews that a very different climate from that of East and 
West Indian Orchidacee is requisite for it. Probably it 
will like the management recommended for Lelias at pages 
26 and 27 of this work for 1839, and most undoubtedly it 
must be guarded against exposure to a high temperature at 
any period of the year. 
With reference to this subject cultivators will probably 
be glad to see the following extracts from Humboldt’s ac- 
count of the Mexican climate. 
** Mexico in lat. 19° 25’, at the height of 7008 feet, has a 
mean temperature of 63”; that of the hottest months is from 
60° to 70”; of the coldest months 50° to 59°. 
** Toluca in lat. 19° 16’, at the height of 8280 feet, has a 
mean temperature of 59°. 
“On the Puerta del Volcan, a volcanic mountain, near 
Toluca, at the height of 10,494 feet, the temperature of a 
rivulet flowing down from it is about 49°.” 
Humboldt does not mention Orchidacee in his list of 
plants growing within the boundary of this tierra fria; but 
he speaks of Peperomia umbilicata, Cheirostemon platanoides, 
Rosa Montezume which is our R. canina, Hoitzia coccinea, 
ue and common Horehound, among many other 
plants. 
