64 MASS. EXPERIMENT STATION BULLETIN 345 



umbels of pure white flowers appear in June about a week later than those of 

 S. Vanhouttei. It is valuable because of its superior foliage and ability to with- 

 stand dry conditions. 



SPIRAEA PRUNIFOLIA var. PLENA DOUBLE BRIDALWREATH 



A fine-wooded, prune-leaved, deciduous shrub to eight feet, bearing small, 

 double, white flowers in profusion in May and having shining foliage which 

 turns brilliant orange in autumn. 



SPIRAEA THUNBERGII Thunberg Spirea 



A three- to five-foot, fine-textured, deciduous shrub with slender, arching 

 branches and narrow, filmy leaves. Its tiny, white flowers appear in profusion 

 with the leaves in April or early May. The foliage turns orange and scarlet 

 in autumn. It does well in seashore planting. 



Spiraea tomentosa HARDHACK 



An erect, gray-leaved, native, deciduous shrub up to some four feet, with 

 pink or purple flowers in crowded panicles in summer. Suitable for wet, open 

 places in wilder areas. 



SPIRAEA TRIGHOGARPA Korean Spirea 



In cultivation this species is looked upon as a coarser, broader, late-flowering 

 supplement of S. Vanhouttei. Its larger clusters of flowers coming at the end 

 of June, after S. nipponica, serve to extend the flowering season of white 

 Spireas. Like the Philadelphus and other shrubs of this flowering habit, it 

 is not suitable for clipped hedges. 



X SPIRAEA VANHOUTTEI VanHoutte Spirea 



This hybrid is one of the most beautiful and most abused of our hardy shrubs. 

 When treated properly as the eight-foot, full-bodied, arching-branched, 

 medium-textured shrub which it can be, it is most pleasing. Torture in clipped 

 hedges and frequent planting in too limited areas have made it seem somewhat 

 banal. 



Spruce — See Picea 



Spurge — See Pachysandra 



Stagger-Bush — See Lyonia 



Staphylea trifolia AMERICAN BladdERNTJT 



An upright, bare-based, native, deciduous shrub to fifteen feet. Of interest 

 in roadside or other wild planting because of bright green foliage, large, in- 

 flated, autumn-prominent seed capsules, and ability to withstand a considerable 

 degree of shade. 



Stephanandra incisa (S. fieXUOSCL) CuTLEAF STEPHANANDRA 



Except for the possible value of its small, interesting, deciduous foliage in 

 informal hedgemaking, this species could well give way to Neillia sinensis. 



STEWARTIA KOREANA 



A rare but desirable species which differs from S. pseudo-camellia in having 

 larger, broader leaves and flowers borne near or at the ends of the branches. 

 Very definitely a hardy plant. 



STEWARTIA PENTAGYNA Mountain Stewartia 



A large (ten feet or more), deciduous, American shrub with rounded leaves 



and white, cup-shaped, three-inch flowers which are borne along the branches 



