228 THE FLORIST AND P0M0L0GI8T. [October, 



BOUGAINVILLEA GLABRA. 



■ VEN those horticulturists who do not possess a suitable house wherein to 

 j^J/ plant out and grow the beautiful Bougainvillea glabra may, if they 

 possess a small stove, or cucumber house, or some similar structure, hope 

 to succeed in flowering it. Why I require for it a stove is because I am 

 about to advise that it should be grown in a large pot, or many small ones in 

 small-sized pots, and to do so will require a moist and somewhat confined atmo- 

 sphere during the growing period, to make up for the want of greater root-room. 

 Very pretty small plants may be formed by growing a young plant along quickly 

 m a moderate-sized pot, and in the full light and sunshine. The wood will 

 require to be well ripened subsequently, by keeping the soil in the pot moderately 

 dry, and placing the plant in a situation fully exposed to air, so that, in fact, it 

 may lose the greater portion of its leaves by the natural process of ripening and 

 falling off. To grow largpr-sized plants in pots, the best way is to plunge the pots 

 bodily into a convenient bed of some kind, and if a little extra warmth pervade it, 

 so much the better. The plant should then be allowed to grow freely along 

 under the glass roof of the structure, without any attempt whatever at stopping 

 or j)inching back. In either case a plentiful supply of root-moisture — occasion- 

 ally consisting of liquid manure — should be given during growth, along with 

 frequent syringings overhead, and a moist atmosphere. — William Earley. 



BLOTCHED SYCAMORE LEAVES. 



3*0 OTH before and after the " fall of the leaf " large black blotches may be 

 [^l;!)) seen on the leaves of Sycamore, Acer Pseudo-platanus, the Plane-tree of 

 cMT ^^^ Scotch. The number of blotches is variable, and the}- look somewhat 

 ^ like blots of ink. They are most prominent on the upper sides of the leaves, 

 nnd are indented underneath. What is the cause of these blurred spots, which 

 feol to tbc touch as if they were the cuticle of the leaf ? Some of the blots seem 

 as if two of them had fallen together, which led me to think that tliey weie 

 possibly the effects of cold rain or hail falling on the tender leaves in spring, the 

 injured parts being changed into blotches by the influence of the atmosphere. I 

 have Ijleached some of these scarred leaves with chloride of lime, but this did not 

 affect the black spots, though it obliterated ink spots of equal size which I made 

 upon them. — J. WifJHTON, Cossei/ Park. 



[The Rev. M. J. Berkeley has been good enough to communicate the 

 following explanation of the spots on t4ie leaves above referred to : — 



'•' It is no nncommon thing, as autumn advances, to see the Sycamore 

 loaves defaced by broad black spots, marked on the surface with waved lines. 

 Tlifse probably cause the leaves to fall sooner than they otherwise would, but 

 tlio leaves themselves with their black spots may still be found in quantities 

 ill the spring ; the waved lines then open, and clouds of spores are given out from 

 the leaves. It is therefore clear that the spots are due to a parasitic fungus, 



