34.6 List of Shrubs 
number of ornamentals, both trees and shrubs, distributed through 
many genera. 
Acacia, see Trees [List B]. 
Albizzia, see Trees [List B]. 
Amorpha. A. fructicosa Linn. (90), False Indigo, a native of southern 
United States, but hardy north to Ottawa, is a spreading shrub (six to 
eight feet and more), with many shoots, beset with oblong, pinnate 
leaves of many bright green leaflets, and unusual, dark violet, purplish 
small flowers, appearing in terminal spikes or racemes, bunched in twos 
and threes (June). It is adapted to dry situations and fit for borders 
and massing on rocky slopes and banks. 
A. canescens Nutt. (g1) or Lead Plant, a native dwarf of the Middle 
West, is useful for color effects because of its generally whitish-silvery 
or lead-colored hues in foliage and stems, and its late, deep purple to 
light blue flower spikes (June to August). It is also fit for dry soils, 
especially in rock gardens, and hardy. 
Caragana, Pea Tree, see Trees [List B]. 
Cercis, Redbud, see Trees [List C]. 
Cladrastis, Yellow-wood, see Trees [List B]. 
Colutea. C. arborescens Linn. (92), Bladder Senna, a native of Italy, 
is the hardiest and most adaptive of this otherwise not quite hardy 
genus, a medium-sized (six to ten feet), slender shrub, decorative by 
reason of its glaucous green foliage of compound leaves, holding their 
color into late fall, and of its yellow to brownish-red flowers, continu- 
ing through the summer, followed by an interesting, balloon-like fruit, 
green to reddish, which gives it its name. It makes a well-rounded 
head, and thrives best in sunny situations and well-drained soil, but 
is only half hardy, and rarely used. 
C. cruenta Ait. (93) (orientalis), a smaller shrub, from southern 
Europe, with pale red to orange flowers, and a few other species and 
varieties are also useful. 
Cytisus, the well-known Broom, is a genus with some forty-five 
species from Europe, Africa, and Asia. It is noted for its free flower- 
ing habit, with yellow, white, and purple racemes in early spring and 
summer. These shrubs grow in almost any soil, even a dry gravelly 
one, and are mostly hardy. They are well adapted for borders of 
shrubberies. 
C. scopartus Link. (94), the Scotch Broom, a low (six to ten feet) 
shrub, has become naturalized in many places. Jt is useful in cover- 
