282 THE ORCHID REVIEW. 
the sides of the basket (unless they are actually overlapping) need not 
cause the cultivator to become uneasy and hasten to re-basket. 
Thirdly, “‘ What is the cause of white spots on the foliage of new 
growths of Odontoglossum crispum. Leaves enclosed?” These white 
spots are caused by yellow thrips. A small puncture is made with the 
proboscis of these insects, from whence they extract the life sap of the 
plant. At first the result is a watery mark, which afterwards turns whitish. 
Keep the plants quite clean, otherwise it is impossible to grow good 
Orchids. For the riddance of these pests our correspondent should get 
the back numbers of the Orchid Review, which he does not appear to 
possess. 
Fourthly, “‘ What to do when the new growths of Oncidium unguicula- 
tum, and others, come among the old bulbs, where there is not room for 
development.” In this condition nothing can de done, nor is it necessary, 
as Nature will provide for itself. Little fear need be entertained that the 
new growth will not find room to develop. In fact it frequently happens 
that when the new growths of Orchids have to fight for room, so to speak, 
they do better than those having an abundance of space. 
Fifthly, “‘ When Odontoglossum crispum, and others, keep sending out 
weak growths, are they useless, or can they be made to send out sturdy 
flowering-sized pseudobulbs?” When Odontoglossum crispum (and 
especially weakly plants) sends forth a number of growths from the old as 
well as from the new pseudobulbs, it is a bad sign and forbodes evil. As 
surely as these growths are allowed to remain, so surely will the plant 
collapse. Take away, immediately they are seen, every growth with the 
exception of one, and let that remain on the last-formed pseudobulb. 
Such a course, together with proper treatment, is the way, and the only 
way, to get weakly plants strong and of a flowering size. Well grown 
vigorous plants never break in this way, much less should weakly ones do 
so. The natural means for a healthy plant to propagate is by breaking 
double from the leading growth only. Rarely do they break back from the 
old ones. 
Sixthly, ‘I have a nice plant of Odontoglossum bictonense, the leaves 
of which are beginning to turn yellow on the strong new lead. I have 
only had it a short time and have watered very carefully. What is the 
cause?” I cannot say. This is another instance where such a result 
could be attained by a variety of ways—wrong treatment, accidents, 
parasites, &c. The plant is a free grower, and should do well with the 
cool Odontoglossums. 
Seventhly, ‘“‘ When does Zygopetalum crinitum flower? Last year 
it had three strong growths but no flower, and this year it has two growths 
12 inches long, but no sign of flower.” Zygopetalum crinitum flowers 
during the winter months, and the flowers are produced from spikes which 
