246 



ROSACEAE. 



Vol. II. 



4. Spiraea corymbosa Raf. Corymbed 

 Spiraea. Fig. 2218. 



Spiraea corymbosa Raf. Prec. Decouv. 36. 1814. 

 Spiraea betulifolia var. corymbosa S. Wats, in A. Gray, 

 Man. Ed. 6, 153. 1890. 



A shrub, i°-3° high, simple or little branched, 

 nearly glabrous throughout.. Leaves petioled, rather 

 thick, oval, ovate or orbicular, narrovifed, rounded 

 or slightly cordate at the base, obtuse at the apex, 

 unequally serrate with pointed teeth, especially above 

 the middle, green above, paler and sometimes mi- 

 nutely pubescent beneath, ii'-3' long, i'-2' wide; 

 stipules deciduous or none ; flowers white, about 2" 

 broad in dense compound terminal often leafy 

 corymbs ; follicles glabrous. 



On banks or in rocky places, New York and New 

 Jersey to the mountains of Georgia and Kentucky. Birch- 

 leaved meadow-sweet. May-June. 



5. Spiraea virginiana Britton. Virginia 

 Spiraea. Fig. 2219. 



S. virginiana Britton, Bull. Torr, Club 17 : 314. 1890. 



A much-branched shrub, the branches forming 



wands i°-4° long, more or less pubescent when 



young, becoming glabrous. Stipules deciduous 



or none ; leaves petioled, oblong or oblanceolate, 



thin, obtuse or acutish at the apex, cuneate or 



rounded at the base, ii'-2' long, 5"-8" wide, 



green above, pale or slightly glaucous beneath, 



entire, or with a few low teeth above the middle; 



petioles i"-2l" long; flowers white, about 3" 



wide, in terminal compound corymbs ; petals 



ovate-orbicular ; pedicels and calyx glaucous ; 



follicles glabrous. 



On damp rocks, West Virginia to the mountains of 

 North Carolina and Tennessee. June. 



6. Spiraea japonica L. f . Japanese Spiraea. Fig. 2220. 



5'. japonica L. f. Suppl. 262. 1781. 

 5. callosa Thunb. Fl. Jap. 209. 1784. 



A shrub 2i°-4i° high, the twigs purplish-brown, 

 finely villous when young. Leaves petioled, ovate 

 to lanceolate, 4' long or less, f'-ii' wide, glabrous 

 above, somewhat pubescent beneath, acute or acumi- 

 nate at the apex, sharply serrate ; inflorescence com- 

 pound, corymbose, 2'-6' broad, finely villous; calyx 

 turbinate, pubescent, its lobes triangular ; petals pink 

 or rose, obovate, i¥' long; follicles glabrous. 



Escaped from gardens, Connecticut to Pennsylvania. 

 Native of eastern Asia. 



Spiraea prunifolia Sieb. & Zucc, a low shrub with 

 lateral umbels of white, commonly double flowers 5"-6" 

 hroad, is much planted for ornament, and has escaped 

 to roadsides in Connecticut and Massachusetts. It is 

 native of Japan and China. 



Spiraea chamaedrifolia L., also Asiatic, and much 

 planted, has simple terminal corymbs of white flowers 

 and small obovate leaves dentate above the middle. It has escaped to roadsides in New York, 



