182 HAKDY OENAMENTAL 



S. DISCOLOR ARL^FOLiA (syn S. ari&folia). White Beam- 

 leaved Spiraea, North- West America, 1827. This forms a 

 dense, erect shrub about 6 feet high, with elliptic-oblong 

 leaves, and clothed beneath with a whitish tomentum. 

 The flowers are in large, terminal, slender-stalked panicles, 

 and white or yellowish-white. It is one of the handsomest 

 species in cultivation, the neat and yet not stiff habit, and 

 pretty, plume-like tufts of nodding flowers making it a 

 general favourite with the cultivators of hardy shrubs. 

 Flowers about mid-summer. In rich soils, and where 

 partially shaded from cold winds, it thrives best. 



S. DOUGLASII. Douglas's Spiraea. North- West America. 

 This has long, obovate-lanceolate leaves, that are white 

 with down on the under surface, and bears dense, oblong, 

 terminal panicles of rosy flowers. S. Douglasii Nobleana 

 (Noble's Spiraea) is a variety of great beauty, growing about 

 a yard high, with large leaves often 4 inches long, and 

 looser panicles of purple-red flowers. Flowering in July. 

 The variety was introduced from California in 1859. 



S. FISSA. Split-leaved Spiraea. Mexico, 1839. A stout, 

 erect-growing shrub, about 8 feet high, with rather small 

 leaves, angular, downy branches, and long, loose, terminal 

 panicles of small and greenish-white flowers. The leaves 

 are wedge-shaped at the base, and when young have the 

 lateral incisions split into a pair of unequal and very sharp 

 teeth. Flowering in May and June. In the South and 

 West of England it thrives best. 



S. HENBYI. Of recent introduction, this is a promising 

 species with ovate leaves and densely produced small 

 white flowers. It is of Chinese origin, and is doing well in 

 a sandy loam and warm position. 



S. HYPERICIFOLIA (syn S. flagellato). Asia Minor, 1640. 

 A wiry twiggy shrub, fully 4 feet high, with entire leaves, 

 and small white flowers produced in umbels at the tips 

 of the last year's shoots. It is a pretty and desirable 

 species. 



