174. MASS. EXPERIMENT STATION BULLETIN 267 



Prunus serrulata sachaUneiisis, Yama Cherry. One of the fine, large, orna- 

 mental Japanese cherries. Perfectly hardy and satisfactory. 



Frunus subhirtella ascendens, Shmo-higan Cherry. One of the very best 

 ornamental Japanese cherries; hardy, permanent, and satisfactory. There 

 is a weeping variety of the same species, but this upright variety is much 

 more desirable. 



Prunus triloba j)Iena, Doubleflowering Plum. This highly ornamental 

 variety has been used on the grounds as a small formal tree budded on hardy 

 stock. Tlie flowers are large, double, and very showy. This seems to be 

 fairly hardy and reasonably permanent, and worthy of recommendation as a 

 hardy flowering shrub. This is one of the plants that are often though 

 erroneously called "flowering almond." 



Pseudotsuga douf/Iasi, Doitglas-Fir. A strong-growing evergreen suited to 

 mass plantings, borders, and screens. 



Ptelea trifuJiata, Commox Hoptree. A curious and interesting native shrub 

 or small tree. Rather sprawling and awkward and suited only to planting 

 along woodland borders. 



Quercus alba, White Oak. A hardy native tree of considerable value. Un- 

 fortunately it is rather hard to transplant and slow-growing while young. 

 When once established it grows more rapidly than is commonly sujiposed, 

 and should be more frequently used. 



Quercus bicolor, Swamp W^hite Oak. A fine, strong, thrifty species well 

 worth more general use; makes excellent specimens. The campus has one 

 notable specimen about fifty years of age and the species is used freely in 

 general mass plantations. 



Quercus cnccinea, Scarlet Oak. An attractive native species comparative- 

 ly easily transplanted and well worth general use. 



Quercus imbricaria, Shingle Oak. A fine, attractive species, probably 

 one of the best of the oaks for general park planting. 



Quercus macrocarpa, Mossycup Oak. An interesting species but of no par- 

 ticular horticultural value in this latitude. 



Quercus jjalustris, Pix Oak. A native tree adapted to moist soil along 

 streams, but will do well on a more elevated location if not too dry. It 

 makes a very symmetrical tree, of good foliage texture. The characteristic 

 s])read of its branches gives it a very attractive a})pearance in winter. It is 

 becoming justly popular as a street tree. 



Quercus robur. English Oak. Much resembling native white oak though 

 of smaller and more compact growth. It is perfectly hardy. 



Quercus rubra, Commox Red Oak. One of our native oaks that is well 

 worthy of consideration in large plantings. Isolated specimens develop wide- 

 spreading, rounded crowns. 



Quercus velutina. Black Oak. This is another of our common native oaks, 

 often associated with the last. It is more upright in habit and suitable for 

 groups in larger plantings. 



