348 List of Shrubs 
winter. They thrive in any except a very wet soil, and prefer light, 
but can stand half shade. 
C. horizontalis Decne (98), from China, a half-hardy, low shrub, 
with almost horizontal branches; is one of the most effective shrubs for 
rockeries, with half evergreen, roundish foliage, and single, pinkish- 
white flowers and bright red fruit. 
C. microphylla Wall. (99), a dense, prostrate shrub from the Hima- 
layas, has similar features, but oblong, glossy, evergreen foliage. 
C. Simonst Bak. (100), and C. frigida Wall. (101), the former less 
hardy, are large, beautiful shrubs, both in flower and fruit. 
Besides these evergreen species there are two deciduous ones, bear- 
ing their white flowers in showy, flat-topped clusters: C. multiflora 
Bonge. (102), a large (five to eight feet) shrub from China, with 
slender, curving branches, a very rapid grower, and attractive with its 
red berries; 
C. nummularia Fisch. & Mey. (103), native of the Himalayas, 
hardy, smaller, and more upright than the preceding, flowering later 
and more profusely, the red berries persisting into winter. 
* Exochorda. H. grandiflora Lindl. (104), Pearl Bush, a tall (eight to 
ten feet), hardy (not in Ottawa), Chinese shrub, growing sometimes into 
tree form, can only by proper pruning be kept in good form; is prized 
for the profusion of graceful festoons of pearl-white, early flowers (April, 
May), a floral gem for refined plantations. Unfortunately, the flowers 
are of short duration, and as they furnish the chief ornamental value of 
the shrub, it should be planted only in the interior of groups. It 
requires a moist, fertile soil. 
Pirus and Prunus (Almond, Apple, Cherry, Peach, Pear, Plum, 
Quince), see under Trees [List C]. 
Physocarpus, see Spiraea. 
Rhodotypus. R. kerrioides S. & Z. (105), a small shrub from Japan, 
hardy to Massachusetts, half hardy in Ottawa, has few equals in grace- 
ful, delicate, slender-pointed green foliage, borne on a multiplicity of 
branches, tipped in spring with conspicuous, large, white, solitary, 
rose-like flowers, followed by a dry, somewhat shiny, black, apple-like 
fruit, hanging into winter. It requires a well-drained, fertile soil. 
Rosa, Rose. Rose culture is an art by itself, and an endless variety 
of flowers have been produced by hybridization, besides the hundred or 
more species. For ornamental use outside the flower garden, and for 
hedges and ground cover, at least three species deserve attention, to be 
