46 MASS. EXPERIMENT STATION BULLETIN 345 



Phlox subulata MOSS PhLOX 



An almost too common, woody-based, fast-creeping, spring-flowering Phlox. 

 It may be had in numerous color forms some of which probably belong to 

 other species. The chief interest in this group at present is being directed 

 toward several varieties, such as VIVID, which do not spread rapidly and 

 hence become of value in the rockery of limited size. 



Photlnla villosa var. laevls 



A large, open, dark-barked, deciduous shrub some fifteen feet through if 

 unpruned, which is of value chiefly because of heavy autumn crop of small, 

 red, long-persistent fruits. Something for the backs of large groupings or for 

 use in semi-wild roadside development. 



Phyllodoce coerulea 



A depressed, six-inch, heath-like native plant with June-borne purple 

 flowers, turning bluish, which can be used in shaded rock-garden situations. 



Phyllodoce empetriformis 



A western species of like vigor but showing slight differences in branch-habit 

 and flowers. 



X Phyllothamnus erectus 



A hybrid evergreen shrub of some twelve inches, which has narrow shining 

 leaves and round, bell-shaped, pink flowers. A rock-garden plant. 



picea Abies (P. excelsa) Norway Spruce 



A well-known, quick-growing conifer which is now being displaced rapidly 

 in large plantings by other finer large spruces and on more limited areas by 

 its own dwarf or slow-growing varieties. It has little place in fine gardening 

 and should be relegated to use in shelter belts, coarse hedges, or other rough 

 purposes. It is not considered by some to be as valuable for Christmas trees 

 as Balsam Fir because of quicker needle drop. It is a common host to a gall- 

 forming aphid. Var. CLANBRASILIANA is a slow-growing, compact, 

 rounded bush rarely exceeding eight or ten feet. Var. gregoryana is a 

 dwarf, dense, conical form usually seen as a two- or three-foot plant. Var. 

 MAXWELLII is a dense, round, flat-topped form which, though spreading to 

 a diameter of several feet, seldom exceeds more than two feet in height. It 

 sometimes produces aberrant coarse shoots which, if propagated, produce 

 stronger-growing plants of the same habit. Like other dwarf forms of Norway 

 Spruce, this is subject to attacks of red spider mite. Var. nidi form is as a 

 young plant is round, bushy, depressed at the top. Var. pygmaea when young 

 forms a dense cone. Vars.PROCUMBENS, REPENS,andTABULIFORMIS, 

 unlike some of the other dwarf forms which later send out prostrate growth, 

 spread from the very start and can form creeping mats if given room enough 

 on the right sort of location. Listed also are narrow fastigiate forms and 

 weeping forms. 



PICEA ASPERATA 



One of the more recently introduced Chinese spruces, which makes a dense, 

 broad, pyramidal tree with an ultimate height of sixty to one hundred feet. 

 Its dark-green foliage and superior garden aspect make it a likely substitute 

 for the Norway Spruce in large plantings. 



PIcea Engelmanni EnGELMANN SpRUCB 



In its native state in western North America, this spruce may develop into 

 a tree one hundred and fifty feet tall. However, in gardens it becomes usually 



