‘DECEMBER, 1916.] THE ORCHID REVIEW. 289 
series. is O. Charlesworthii, which Messrs. Charlesworth obtained by 
crossing Odontoglossum Uroskinneri with the pollen of Miltonia vexillaria. 
Other remarkable things are O. Cholletii, raised by Messrs. Sander & Sons 
from Odontoglossum Harryanum x Miltonia vexillaria, and O. brugensis, 
from O. Edwardii X M. vexillaria. It is a gens of which more is likely 
to be heard in the near future. 
my 34), BARREN, The hd Hill Gardens, 
CALENDAR OF OPERATIONS FOR DECEMBER. 
Hess te; j Bo a9 o 
E have now reached the shortest month of the year, and as daylight 
is scarce the cultivator must be satisfied to move slowly, 
remembering that nature is never in a hurry. Plants that are growing 
should be encouraged to make slow and sure progress, whilst those -at rest 
should remain in that state until the return of more genial conditions. 
TEMPERATURES and other conditions should remain as advised in the 
two previous Calendars, care being taken to avoid an overheated 
atmosphere. Too much atmospheric moisture at this séason is most 
injurious, as is easily realized when one remembers that most Orchids in 
their native habitats rest during the dry season, and make their growths 
during the rainy one. Nature has a reason and purpose for everything, 
and if her laws are ignored the cultivator will soon find his plants in a bad 
way or failing to bloom satisfactorily. 
We can now take stock, so to speak, of the season’s work, comparing 
the results with previous years. Personally, I am well satisfied with the 
results attained, although many may think that, through lack of sunshine, 
the season has been far from an ideal one. It is our misfortune to have to 
deal with a changeable climate, but it is not without its advantages, as it 
necessitates vigilance and prevents us from taking unnecessary risks 
CALANTHES of the vestita and Veitchii section will now be in bloom, 
and if it is desired to keep them over the Christmas season, the plants may 
ba removed to cooler quarters as soon as two-thirds of the flowers are 
Open. They will need little water, but when the’ flowers are faded, or the 
spikes cut, they should be placed in a light position in a warm house to 
consolidate the bulbs. They require a thorough rest, during which period 
no water should be given. The later-flowering C. Regnieri and others, now 
pushing up their flower spikes, will require ee with care until the 
flowers are fully matured. 
MicTonias of the vexillaria section, including the hybrids, are now in 
active growth, and, like all plants that grow during the winter, require all 
the light possible. They are best elevated to within a foot of the glass, in 
