172 MASS. EXPERIMENT STATION BULLETIN 267 



Pinus cembra, Swiss Stonk Pine. An attractive syniinetrical tree useful in 

 ornamental planting. It has not proved to he a lonji-lived tree on the campus. 



Pinutt montnud mu(jhuti, Mroiio Pine. A dwarf pine widely planted and 

 quite satisfactory. Old specimens have a tendency to get ragged and bushy. 

 When this condition ari.ses, the plants may be heavily cut back and allowed 

 to branch out and start again, or they may be cut out and thrown away, 

 their place being taken by fresh young stock. This j)lant is so much better 

 during its early years than during its later years that it seems hardly worth 

 while to keej) it after it begins to get ragged. 



Pinus iiiiird, .VusTRiAx Pine. One of the best pines for general ornamental 

 planting, rugged, symmetrical, with good foliage. The tree is not very large, 

 but seems to be permanent and satisfactory. 



I^iiiut) resinosa, Red Pine. A fine, strong-growing, lusty species of prime 

 value in forest plantations and excellent for heavy masses in landsca^ie work. 

 One of the best of all the pines. 



Pinus riijitla, Pitch Pine. Grows abundantly throughout the region, but 

 especially upon dry gravelly sterile soil. It is picturesque in form. It is easy 

 to propagate and transplant and is really worthy of frequent consideration 

 where plantations have to be established on sand or gravel. It is especially 

 abundant and attractive in the Cape Cod region. 



Pinus strobus, White Pine. This native species is a deserved favorite. It 

 is attractive in all conditions whether youn^ or old. It does well on a variety 

 of soils from moderately dry to moderately moist. It makes excellent speci- 

 mens or fine woodland plantings, and has an outstanding forest value. When 

 thickly set and closely sheared it makes a fine hedge. One serious drawback 

 is found in its susceptibility to the attacks of the pine borer. This insect cuts 

 out nearly all the leaders when they reach a height of about ten feet. The 

 more recently introduced white pine blister-rust is also a menace to this 

 species. 



Pinus syh'est.ris, Scotch Pine. A thrift}", hardy pine which makes itself 

 entirely at home on the college grounds and reproduces itself freely from 

 seed. It is a picturesque, attractive tree for mass planting, but does not make 

 good symmetrical specimens. The ease with which it reproduces and trans- 

 plants recommends it for general use. 



Platanus ocridrnfiilis, A^iekkan Pi.anetkee. This nati\e species is thor- 

 (aighly hardy and satisfactory, i)eing especially at home along the moist banks 

 of streams and in allu\iai land. It is a rapid-growing tree, large and lordly 

 thougli not especially symmetrical. Its foliage and bark present an interest- 

 ing coarse texture. This s})ecies is distinctly useful in certain kinds of park 

 planting, especially for large masses viewed from some little distance. 



Platanus orienlalis, European Planetuek. Tiiis species generally forms a 

 more symmetrical and attractive siiecimen than its .American congener, but 

 does not seem to be fully adapted to this climate. Apparently it docs imich 

 belter farther south. 



Populus alba, White Popi..\r. Like all the poj)lars this makes a rather i)oor 

 tree, but where (piick results are required it may be used for tenq)orary plant- 

 ing. 



Populus boUeana, Boi.leaxa Poplar. Botanically this is but a columnar 



