KKY TO THE SPIRKAS 1 ,")7 



K. Shrub with purplish brown whip-like branches; small white 

 flowers in rounded clusters (11-3 inches broad) in May and 

 June; leaves coarsely, often doubly, serrate, bluish-green lie- 

 low, 1^-3 inches long. CORYMBED SPIREA (220) Spinea 

 corymb6sa. 



K. Later-blooming (June to Aug.) but similar shrubs. I'.iiicii- 

 LEAVED SPIKEA (i?-7) Spinca betulifoHii and the follow- 

 ing : 



L. Branches yellowish brown with more deeply cut leaves ; 

 flowers white. WESTERN CORYMBKD SPIREA (228) 

 Spiraea lueida. VIRGINIA SPIREA S. virginiana. 

 L. Branches striped dark brown ; rather large white or pale pink 



flowers with round petals. Spiraea supe'rba. 

 L. Flowers bright pink in dense clusters 1-2 inches broad. 

 DENSE-FLOWERED SPIREA Spirpea densiflora. 



* Extensively cultivated hybrid Spireas with rounded and very com- 



pound clusters (about as broad as high). Only the commonest are 

 given ; new ones of garden origin are constantly being intro- 

 duced. (M. ) 



M. Tall-growing (0 feet) with slender upright branches and numer- 

 ous rather small lateral clusters (1^-3 inches) of white or pink 

 flowers, June, July. Leaves 1-2 inches long, pale bluish green 

 below, rounded at both ends, crenately notched beyond the 

 middle. Not fully hardy North. FONTENAY'S SPIREA Spiraea 

 Fontenaysii. 

 M. Smaller shrubs (3-4 feet) with larger terminal clusters on upright 



branches. (N. ) 



N. Upright shrub with dark brown branches and oblong smooth 

 leaves (1^-2.1 inches long) acute at both ends and fully serrate. 

 Flowers pinkish white in broad finely pubescent clusters, July- 

 Sept. Spiraea conspfcua. 



N. Upright shrub with striped and finely hairy branches ; leaves 

 2-3 inches long, elongated and pointed at both ends, fully 

 serrate, grayish-hairy beneath. Flowers pink in broad corymb- 

 like panicles, July, Aug. Spiraea sanssouciana. 

 N. Similar to the last but the leaves usually rounded at base and 

 the flowers a lighter pink, June, July. NOBLE'S SPIKEA. 

 (229) Spiraea Nobleana. (Similar to this, with larger leaves 

 and paler flowers, PLUMY MEADOW-SWEET Spiraea pachysta- 

 chys.) 



* QITEEN OF THE MEADOW and MEADOW-SWEET SPIREAS (including 



Schizonotus, 3d O) with elongated and very compound clusters of 

 small white or pink flowers. (O.) 



