Part 3, 1908] ROSACEAE 249 
suborbicular, 2-10 cm. long, coarsely and sharply serrate above the middle, with sharp or 
mucronate teeth, rounded, subcordate, or acute at the base, acute, obtuse, or even 
rounded at the apex, paler beneath, with scattered hairs on the veins and petioles; panicle 
flat-topped, 3-10 cm. wide ; branches more or less pubescent; hypanthium hemispheric, 1 
mm. deep; sepals triangular, acute, erect or merely spreading; petals orbicular, white, 1.5 
mm. long; follicles oblanceolate, glabrous, shining, about 3 mm. long, their beaks less 
than 1 mm. long. 
TYPE LOCALITY: Virginia. 
DISTRIBUTION: Banks and rocky places, from New York to Georgia and Kentucky. 
ILLUSTRATIONS: Bot. Cab. pl. 671; Wats. Dendr. p/. 67, as S. betulifolia ; Britt. & Brown, 
Il. Fl. fi 1885. 
10. Spiraea virginiana Britton, Bull. Torrey Club 17: 314. 1890. 
A shrub, 3-12 dm. high, the branches erect or reclining; bark of twigs light-brown, 
more or less pubescent, in age becoming glabrous, not exfoliating ; petioles 2-5 mm. long ; 
leaf-blades oblanceolate or oblong, thin, mucronate or cuspidate, acute or rarely rounded at 
the base, entire or with a few teeth towards the apex, 3-5 cm. long, 1-1.5 cm. wide, dark- 
green above, pale and glaucous beneath, glabrous or finely pubescent on the veins; inflor- 
escence flat-topped, 3-5 cm. wide; branches more or less pubescent ; hypanthium shortly 
turbinate-campanulate, 1.5mm. deep; sepals triangular, acute, 1 mm. long, erect or spread- 
ing ; petals white, ovate-orbicular, nearly 2 mm. long; follicles glabrous, shining. 
TYPE LOCALITY : Damp rocks along the Monongahela River, Morgantown, West Virginia. 
DISTRIBUTION: Rocky places, from West Virginia to North Carolina and Tennessee. 
ILLUSTRATION : Britt. & Brown, Ill. Fl. f 1886. © 
11. Spiraea japonica L,. f. Suppl. 262. 1781. 
Spiraea caliosa Thunb. FI. Jap. 209. 1784. 
Spiraea Fortune Planch. Fl. Serres9: 35, 1853. 
A shrub, 8-15 dm. high, erect; bark of the twigs purplish-brown, finely villous when 
young ; petioles very short, 2-7 mm. long; leaf-blades ovate or lanceolate, 5-10 cm. long, 
2-4 cm. wide, glabrous above, more or less pubescent beneath, sharply and usually doubly 
serrate from near the base, acute or acuminate; inflorescence a compound corymb, mostly 
flat-topped, 5-15 cm. wide, finely villous; hypanthium turbinate, 1 m. high, pubescent; 
sepals triangular, 1 mm. long, in age more or less reflexed; petals pink or rose, rounded- 
obovate, 3 mm. long; disk weakly developed; follicles erect or nearly so, glabrous. 
TYPE LOCALITY: Japan. 
DISTRIBUTION: Native of Japan; often cultivated and escaped; established at several stations 
from Connecticut to Pennsylvania. 
ILLUSTRATION : Fl. Serres p/. 872. 
12. Spiraea latifolia (Ait.) Borkh. Handb. Forstbot. 1871. 1803. 
Spiraea salicifolia latifolia Ait. Hort. Kew. 2: 198. 1789. 
Spiraea carpintfolia Willd. Enum. Hort. Berol. 540. 1809. 
Spiraea crenata Muhl. Cat. 49, 1813.— Torr. Fl. U. S. 482. 1824. Not S. crena/a L. 
Spiraea alba Wats. Dendr. pl. 133. 1824. Not S. alba DuRoi, 1772. 
Spiraea ovata Raf. New Fl. 3: 65. 1838. 
Spiraea heterophylla Raf. New F1.3: 65. 1838. 
Spiraea obovaia Raf. New Fl. 3: 66, 1838. 
Spiraea bethlehemensis K. Koch, Dendr. 1: 313. 1869. 
Spiraea alba latifolia Dippel, Handb. Laubh. 3: 484, 1893. 
A shrub, 1-20 dm. high, branched; bark of the twigs glabrous, chestnut or reddish or 
the older sometimes nearly black, sooner or later peeling off; petioles 2-4 mm. long; leaf- 
blades broadly oblanceolate or obovate, thin, 2-8 cm. long, acute, obtuse or rounded at the 
apex, tapering at the base, sharply and sometimes doubly serrate, perfectly glabrous or 
slightly ciliate on the ribs and petioles; inflorescence paniculate, conic, 0.5-2 dm. long 
and about half as wide; bracts sometimes ciliate; hypanthium hemispheric, less than 1 
mim. deep, glabrous; sepals triangular, acute, spreading or slightly reflexed in anthesis, 
ascending in fruit; petals white or a little pinkish in bud, suborbicular, 1.5mm. long; fol- 
licles oblanceolate, glabrous and shining, 3-4 mm. long; seeds linear-lanceolate, attenuate 
at each end. 
