146 THE ORCHID REVIEW. 
by the accompanying illustration (fig. 8), which is reproduced natural size 
from a photograph from Messrs. Sander. The living flower measures’ 
3% inches in diameter across the petals, which themselves are seven- 
eights of an inch broad. Messrs. Sander must be congratulated on the 
possession of such a beautiful novelty. 
R.. Alig 
DENDROBIUM HYBRIDS. 
WE are now able to record the third hybrid between the D. thyrsiflorum and 
D. nobile groups, in the collection of R. Brooman White, Esq., of Arddarroch. 
It is believed to have been raised from D. Farmeri x D. nobile, and should 
be strong enough to flower next year, in which case we hope to have the 
pleasure of seeing it. In our note at p. 110, the parentage of the second 
hybrid of this group was given as D. densiflorum xX D. nobile. It should 
have been D. densiflorum x D. tortile. Our readers should make the 
necessSary correction. 
CALENDAR OF OPERATIONS FOR MAY. 
By W. H. YounG, Clare Lawn, East Sheen. 
THE summer treatment of Orchids may be said to commence with this 
month, though each particular item in the daily management of these 
subjects should, at the beginning of the summer season, be carried out in a 
moderate and circumspect manner, for as all gardening operations depend 
so much on the state of the weather, so also will the adoption or rejection 
of the “ fine weather” treatment of Orchids have to be considered with the 
advent of each day. The maximum temperatures will now be reached— 
that is, with the aid of fire-heat—namely :— 
Day. Night. 
East Indian and Phalenopsis house fe 70° 65° 
Cattleya and Mexican house... = oe 65° 60° 
Intermediate house... ae == A; 60° 58° 
Cool houses... 55° 50° 
The day temperatures of the first four may rise to anything under 85°; 
providing the rise is caused by sunshine alone, the above figures only indi- 
cating the degree of warmth required to be maintained by artificial means 
if that from natural sources be lacking. 
The question is often asked by persons unacquainted with the habits of 
Orchids as to when is the best time to see them—meaning, when is the best 
floral display produced by these varied and gloriously-coloured flowering 
plants? Time was when it was safe to give the month of May as the “‘ best 
