250 NORTH AMERICAN FLORA [VoLuME 22 
TYPE LOCALITY: North America. 
DISTRIBUTION : Newfoundland to North Carolina, western Pennsylvania, and Saskatchewan. 
ILLUSTRATIONS: Wats. Dendr. p/. 127, as S. alba; Britt. & Brown, Il. Fl. f 188%, as S. 
salicifolia ; Cycl. Am, Hort. f. 2638. 
13. Spiraea alba DuRoi, Harbk. Baumz. 2° 430. 1772. 
Spiraea tomentosa alba Matsh. Arbust. 147. 1785. 
Spiraea salicifola paniculata Ait. Hort. Kew. 2: 198. 1789. 
Spiraea cunetfolia Borkh, Handb. Forstbot. 1455. 1803. 
Spiraea lancifolia Hoffmsgg. Preisverz. Pfl. 8: Nacht. 44, 1825. 
Spiraea paniculata Willd.; G. Don, Gen. Hist. 2: 520. 1832. 
Spiraea flexuosa Raf. New Fl. 3: 64. 1838. 
Spiraea ciliata Raf, New Fl. 3: 66. 1838. 
Spiraea salicifolia lanceolata T. & G. Fl. N, Am. 1: 415. 1840. 
Sptraea salictfolia linearis Wenzig, Flora 71: 280. 1888. 
A shrub, 1-2 nt. high; bark of the twigs brown, more or less puberulent, of the older 
stems gray; petioles 2-5 mm. long, puberulent ; leaf-blades narrowly oblanceolate, rather 
firm, more or less puberulent on the veins, sharply serrate, acute at each end, 3-6 cm. long, 
1-1.5cm. wide; inflorescence paniculate, conic, 5-20cm. long, its branches usually densely 
puberulent ; hypanthium hemispheric, nearly 1 mm. high, puberulent; sepals triangular, 
acute, ascending or spreading; petals white, about 2 mm. long, suborbicular; follicles 
glabrous, shining, oblanceolate, about 3.5 mm. long; seeds linear-lanceolate, tapering at 
each end, about 2 mm. long. 
TYPE LOCALITY: America, 
DISTRIBUTION: New England to North Carolina, Iowa, North Dakota and Saskatchewan. 
ILLUSTRATION: Mill. Fig. Pl. Gard. Dict. 2: pl. 257, fi 2 
14. Spiraea salicifolia L. Sp. Pl. 489. 1753. 
Spiraea carpinifolia Wats. Dendr. pl. 66. 1823. Not S. carpinzfolia Willd. 1809. 
Spiraea grandiflora odd. Bot. Cab. is 1988. 1833. Not S. grandifiora Sweet, 1830. 
Spiraea amena Raf. New FI. 3: 65. 
A shrub, 1-2 m. high; bark co: soniewnat angled young twigs brown, finely pu- 
berulent, that of the old stems dark-gray; petioles 2-6 mm. long, puberulent; leaf-blades 
lance-oblong, broadest at the middle, acute at each end, sharply serrate, 3~7 cm. long, 
puberulent on the midrib and margins; inflorescence a narrow panicle, 5-10 cm. long, 2-3 
cm. wide, its branches puberulent ; hypanthium hemispheric, about 1 mm. deep, usually 
puberulent ; sepals ovate, acute; petals pink, rounded-ovate, obtuse, about 2 mm. long; fol- 
licles oblanceolate, glabrous, about 4 mm. long. 
TYPE LOCALITY: Siberia. . : 
DISTRIBUTION: Native of Siberia and eastern Russia; occasionally escaped from cultivation in 
the eastern states. 
ILLUSTRATIONS : Pallas, Fl. Ross. pi. 21; Engl. Bot. p/. 1468; Bot. Cab. pl. 1988, as S. grandi- 
Jiora ; Wats. Dendr. pi. 66, as S. carpinifolia. 
15. Spiraea roseata Rydberg, sp. nov. 
A low shrub ; bark of young shoots pale, glabrous and rather shining; that of the older 
branches chestnut ; buds glabrous; petioles 1-2 mm. long ; leaf-blades elliptic, 2-5 cm. long, 
1-2 cm. wide, sharply serrate, with the teeth directed forward, acutish at each end or the 
smaller obtuse at the apex, thin, glabrous on both sides; inflorescence small and dense, 
oblong, 2-6 cm. long, 1-2 cm. wide; hypanthium hemispheric, 1 mm. high, glabrous; 
sepals triangular-ovate, acute, slightly over 1mm. long, glabrous or nearly so, soon reflexed; 
petals rose-colored, elliptic, 2-2.5 mm. long ; stamens 20-25; filaments twice as long as the 
petals; disk inconspicuous. Intermediate between S. Menziesii and S. densiflora, and per- 
haps a hybrid between the two. 
Type collected August 13, 1895, on the shores of Petitt Ae Idaho, within 100 yards of the 
lake at an altitude of 2180 meters, 'B. W. Everman 304 (U.S " Nat. Herb. xo. 243090) ; there also 
collected by Henderson. 
16. Spiraea pyramidata Greene, Pittonia 2: 221. 1892. 
A shrub, 3-10 dm. high; bark of the twigs chestnut-brown and more or less pubescent, 
exfoliating sooner or later; petioles 2-5 mm. long, puberulent; leaf-blades oval, usually 
