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NAT. ORDER. SPIRjEACEiE. 
Spircea chamcedrifolia. Germander-leaved Spiraea. — This kind 
has an abundance of shoots, seldom six inches high, about the thick- 
ness of the finger, wand-like and branched ; the wood is brittle ; the 
bark of the shoots is a yellowish brown, with prominent dots scat- 
tered over its surface ; the branches are alternate, commonly angu- 
lar, with a testaceous bark somewhat striated, and in the younger 
branches covered with a tender ash-colored epidermis, which falls 
off ; the annual shoots are grooved and pubescent ; the leaves are 
alternate, soft, pubescent, with prostrate hairs, quite entire at the 
base, but generally deeply serrated from the middle to the end, where 
they are sharp ; corymbs at the top of the steins frequent, many- 
flowered, terminating the annual alternate shoots; in gardens and in 
moist shady places these corymbs are more elongated ; but in a ruder 
soil most of the peduncles are clustered at the top, like an umbel ; 
the flowers are large, white, having a weak virose smell, and fuga- 
cious. It is a native of Siberia. 
Spiraea crenata. Hawthorn-leaved Spiraea. — This species has 
several stems, scarcely six inches high, very much branched from 
the bottom ; the branches are rod-like, round, with a testaceous 
bark cloven longitudinally ; the leaves on the younger branches and 
annual shoots are alternate, attended with smaller ones in little bun- 
dles, hoary or glaucous, three-nerved, hard, varying in form and size; 
on the luxuriant shoots or branches sometimes ovate-acute, serulate 
from the tip beyond the middle, but most commonly oblong, bluntish, 
crenulate, or serrulate towards the tip, or sometimes quite entire ; 
the corymbs at the ends of the annual shoots, very abundant, dis- 
posed along the branches on one side, in hemispherical clusters ; the 
flowers are small, white and odorous. It is a native of Spain, and 
flowers here in April and May. 
Spircea trilobata. Three-lobed-leaved Spiraea. — This species 
has numerous stems, about the size of a large goose-quill, very much 
branched, upright, with a gray bark, which is more or less pale, and 
somewhat angular, with shai-n streaks runnino- rlnwn from }h<* 
