iSyo.] HARDY HERBACEOUS PLANTS. 353 



found a small tunnel, in which the larva is lying and feeding upon the 

 inner bark of the tree. Two generations are yearly produced, the one 

 in May, the other in August. The best means to destroy them is to 

 thrust a needle down through their abodes, whereby they will instantly 

 be destroyed. Mr M'Intosh recommends painting the branches so 

 affected by a solution of lime on the first appearance of the enemy. 



The Ditula angustiorana is a greenish caterpillar, which, feeding 

 upon the leaves, does considerable damage. It makes its appearance 

 in May, and forms itself a home by binding together the extremities 

 of the leaves, which, as they continue to grow, become curled. In the 

 course of a short time it changes into a chrysalis, from which emerges 

 the perfect moth in the month of July. The best means to destroy 

 these is by hand-picking, which ought to be repeatedly and carefully 

 done during the early part of the summer. James M'Millan. 



{To be continued.) 



NOTES ON NEW, RARE, AND CHOICE HARDY 

 HERBACEOUS PLANTS. 



The attention now being given to those plants, a pledge of their rising 

 popularity, induces me to forward you the following notes of a few 

 thoroughly good things, which, though not new save in a few instances, 

 are yet comparatively little known and seldom met with. 



Aquilegia ccerulea is a beautiful plant from the Rocky Mountains, 

 which is not sufficiently known. It is remarkably showy, and distinct in 

 character from any other species, and produces in a somewhat free 

 manner large erect flowers of a beautiful violet-blue hue, delicately 

 suffused with white towards the mouth. A little protection during 

 winter, though not absolutely necessary, should be given to this fine 

 species, for the sake of safety. 



Arabis purpurea or rosea. — This is a new and distinct species, of 

 recent introduction, from the mountainous districts of Asia Minor, 

 closely resembling the well-known Arabis albida, and blooming about 

 the same time. Its flowers are produced in great abundance, and are 

 of a pale rose colour ; it is very attractive, and is certainly a valuable 

 acquisition for the spring garden. Mr William Ingram, of Belvoir, 

 whose spring gardening can compare with anything like it in Great 

 Britain, has used this Arabis this season, and speaks of it in the 

 highest terms of praise. 



Armeria Alpina grandiflora. — This is a beautiful large-flowering 

 variety of A. Alpina, which, from its immense distribution, will soon 

 become a familiar plant. It is of very free growth, resembling the 



