120 LANDSCAPE GARDENING. 



of the most useful, though for larger plants selected 

 varieties of P. Americana make the finest of small trees. 

 The Sand cherries, P. 2^i(niila, and P. Besseyi, growing 

 from two to five feet high, are excellent; while for 

 heavy masses in certain places the common Choke 

 cherry is one of tlie best species known. It is vig- 

 orous, clean and healthy, though occasionally denuded 

 by caterpillars. 



Rhododendrons. — These magnificent ornamental 

 plants are hardy in most situations and not usually diffi- 

 cult to grow. There are many wonderful and striking 

 varieties ofl;ered by the nurserymen, but the beginner 

 will hardly be able to discriminate their merits. 



Ehus, Sumach. — The sumachs are mostly all very 

 hardy and good ornamentid plants. Their spreading, 

 luxuriant pinnate foliage gives a peculiar and somewhat 

 troincal suggestion. In most places they are best if the 

 old growth is constantly cut out and the vigorous young 

 shoots depended on. Their colors in autumn are espe- 

 cially desirable. Ehus glabra is probably best, followed 

 by P, co^mlUna and P. ty2)liina. P, Cotinus, the Smoke 

 tree, is quite different from the others. It is a well 

 known shrub, five to ten feet high, bearing large feath- 

 ery wands of reddish or purplish abortive blossoms. 



RiBEs AUREUM. — A uativo currant, now often cul- 

 tivated for fruit as well as for ornament. It bears many 

 pretty, spicy, sweet scented, bright yellow flowers in 

 spring, and always shows a clean, attractive foliage. 

 Four to seven feet. Other species of currants and goose- 

 berries are also useful in shrubbery masses. 



Roses. — Hardy flowering roses are usually best 

 planted in beds by themselves ; but many of the native 

 species are remarkably fine if grown in the border with 

 the other shrubbery. Posa Incida, P. llanda and nearly 

 all the native species may be planted. The Sweet Brier 

 and the Prairie rose, P. setigera, are among the best. 



