230 BRECK'S BOOK OF FLOWERS. 



ica, and found growing upon the mountains at the South, and is 

 very hardy. A light loam suits it well, but propagation is dif- 

 ficult. It succeeds when budded or grafted on the ash. 



CLETHRA. 



This genus is composed mostly of American plants, and 

 succeeds well when transplanted to the shrubbery. 



Clethra alnifolia. Alder-leaved Clethra. A shrub, from 

 two to eight feet high, showing a long spike of white fragrant 

 flowers, towards the end of summer. It is generally found 

 abundantly in wet, boggy places, and by the side of sluggish 

 streams. Emerson says : " This beautiful plant may be easily 

 cultivated, and is much improved by cultivation, the spikes 

 being increased in length, and in the size of the flowers. It 

 grows readily in any garden soil, and may be propagated by 

 layers or cuttings." 



COLUTEA. 



Bladder Senna. 



Colutea, an ancient name of a bush with sweet-scented 

 flowers. The genus includes a number of species of shrubs, 

 with yellow or orange, pea-shaped flowers, which are succeeded 

 by seed-vessels like bladders. 



C. arborescens grows about ten feet high, with yellow flowers, 

 in June and July. C. cruenta, four feet high, with reddish 

 flowers ; and C. Pocockii, with dark-yellow flowers. All are 

 free growers, and well adapted to introduce into extensive shrub- 

 beries. 



CORNU8. 

 Cornel Dogwood. 



Cornus, from cornu, a horn ; the wood being thought to be 

 as hard and durable as horn. The larger species of this genus 



