240 Trees for Shade and Ornament 



length), brush-like, lively blue-green foliage, enclosing its large silvery- 

 white bud, with its candelabra-like, upturned ends of branches, it is a 

 striking specimen tree. Its unusually deep-growing roots require deep, 

 well drained sand soils, and it is difficult to transplant, except in small 

 specimens. 



P. echinata Mill, {niitis Mx.) (165), Shortleaf Pine, extending its 

 botanical limits into Northern States, compares favorably with any of the 

 yellow pines of similar character, and should be more widely planted 

 than it is. 



P. glabra Walt. (66), Spruce Pine, one of the far southern species, 

 with a very fine, flexible, slender foliage and globular form, is one of 

 the most promising ornamental pines for southern planting, although 

 as yet hardly known. 



P. ponderosa Dougl. (67), Bull Pine, is a stately and very hardy tree 

 from the western mountains; of long, stout, light-colored foliage; re- 

 tains its conical shape in deep soils, but flattening its crown in poor 

 soils. Its ornamental value is hardly established, but it promises 

 well, being at least equal, if not superior, to the Austrian pine which it 

 resembles. 



The European species, P. Pinaster Sol. (68) {marilima), Cluster Pine, 

 resembling P. Laricio, but not adapted to limestone soils, nor hardy 

 with us, offers no special points of ornamental value. 



P. Mughus Scop. (69) and P. Pumilio Haenke (70), (montana Mill), 

 the two popular dwarf pines from the Pyrenees and Alps, are shrubs 

 rather than trees, growing up with several stems from the ground, or 

 at least branching low, and often growing in bush form. Where a low 

 mass of foliage is desired, as to hide unsightly places, etc., they furnish 

 an excellent material. They are much used in rock gardens and formal 

 plantings with other evergreens, and are perfectly hardy. Numerous 

 varieties are in existence. 



SPRUCES 



■ Picea. (Formerly confused with Abies, or the names transposed, 

 just as the common names of spruce and fir, and even hemlock, are often 

 promiscuously used or interchanged, although the distinction between 

 the different genera is easily made.) There are in existence some eigh- 

 teen species of northern or alpine range, which are not fit for southern 

 planting, although the Norway spruce appears perfectly at home in 

 Washington. Tall to medium size, and some small trees; with sharp- 



