THE ARNOLD ARBORETUM 37 



perpetuate his name than by providing the Arboretum with the 

 means of estabHshing a real Rose garden, such as exists nowhere 

 else in the world. 



Some years ago Mr. J. G. Jack, of the Arboretum staff, visited 

 the far East, and although he spent only a short time in Korea, he 

 discovered several interesting new plants, among them DiennUa 

 fiorida venusta, perhaps the handsomest of all the species, varieties, 

 and hybrids of the Weigela. It is a shrub which grows five feet 

 tall, and in Spring is completely covered with dense clusters of 

 rosy-pink flowers from an inch and a half to two inches long. 

 It is perfectly hardj^ too, which cannot be said of all the Weigelas. 

 It grows rapidly, and no shrub known bears larger crops of flowers. 

 It is one of the purposes of the Arboretum to search out the best 

 varieties among the different shrubs, testing them for hardiness 

 and reporting on their availability for northern gardens. 



Repeated tests have shown that many of the Deutzias, handsome 

 as they are, are not suited to cultivation in New England. It is 

 not often that plants are actually killed, but they are frozen back 

 so hard that they do not bloom. Devtzia parvifolia, Deutzia 

 crenata, and a few others are known to be perfectly hardy. Several 

 Deutzias from western China are now being tested in the Arbore- 

 tum, and it is hoped that some of them will prove valuable ad- 

 ditions to New England gardens. 



The Arnold Arboretum has the largest and most complete collec- 

 tion of Loniceras, or Honeysuckles, in the world, just as Mr. 

 Rehder, of its staff, is the leading Lonicera expert in the world. 

 Lonicera Korolkovii is a shrub of peculiar elegance. A bush 

 Honeysuckle with grayish leaves is a novelty. At times this 

 gray is so intense as to be almost blue, while again it is nearer green. 

 View it in the morning when covered with dew, and it looks as 

 though encrusted with a kind of enameled jewelry. Many different 

 Honeysuckles have been tested out at the Arboretum, climbers 

 as well as those having a bush form. Among the newer arrivals 

 is Lonicera Henryi, one of the few evergreen climbers hardy in this 

 climate. 



Sorbaria arhorea is a discovery of INIr. Wilson's. It's a charming 

 shrub if given planty of elbow room. As a matter of fact it will 

 insist upon having all the room it needs, because it just naturally 



