Parr 3, 1908] ROSACEAE 247 
mm. wide, entire, thick, dark-green, mucronate; inflorescence racemose, 1-2 cm. long; 
bracts linear, 1-3 mm. long; pedicels about 2 mm. long; hypanthium turbinate, glabrous, 
about 1.5 mm. high; sepals triangular, acute, about 1 mm. long, valvate in aestivation; 
petals white, obovate, about 2 mm. long; stamens 15-20; filaments subulate, half as long 
as the petals; pistils usually 3; follicles obovoid, apiculate, 2-2.5 mm. long, glabrous; 
seeds about 4, linear-lanceolate, acute at both ends. 
TYPE LOCALITY: Puenta del Dio, Mexico. 
DISTRIBUTION : Known only from the type locality. 
3. Spiraea ulmifolia Scop. Fl. Carn. ed. 2.1: 349. 1772. 
Spiraea chamaedryfolia Jacq. Hort. Vind. 2: 66. 1772. Not S. chamaedryfolia l.. 1753. 
A shrub, about 2m. high; bark of the young twigs light-brown or yellowish ; that of the 
previous season’s growth rather dull, more or less exfoliating, and of the old stems brown; 
petioles slender, 5-10 mm. long; leaf-blades thin, oval or ovate, 3-5 cm. long, acute at 
both ends, sharply and more or less doubly serrate, green on both sides, sparingly hairy 
or glabrous except the margins; inflorescence a rather dense, rounded corymb; pedicels 
1.5-2 cm. long, glabrous; hypanthium campanulate, glabrous, fully 1.5 mm. deep; sepals 
glabrous, nearly 2 mm. long, ovate, acute, in fruit more or less reflexed; petals white, 
orbicular or rounded-ovate, about 5 mm. long; follicles glabrous, oblong, about 3 mm. 
long, their beaks minute. 
TYPE LOCALITY: Near Idria, Carniola, Austria. 
DISTRIBUTION: Austria-Hungary and Balkan Peninsula; cultivated and occasionally escaped 
in the eastern states ; especially established in Connecticut. 
ILLUSTRATIONS : Jacq. Hort. Vind. /. 140; Bot. Reg. 15: pl. 1222 (both as S. chamaedry- 
Solia) ; Scop. Fl. Carn. pl. 22* ; Loud. Arb. f. 470; Fl. Deuts. ed. 5, pl. 2563A. 
4. Spiraea Steveni (C. K. Schneid.) Rydberg. 
Spiraea chamaedrifolia media Pursh, Fl. Am. Sept. 342, in part. 1814. : 
Spiraea chamaedryfolia Cham. & Schlecht Linnaea 2: 2. 1827. Not S. chamaedryfolia 1. 1753. 
Spiraea chamaedrifolia B Hook. Fl. Bor. Am.1: 171. 1832, 
Spiraea betulifolia BT. & G. Fl. N. Am. 1: 414. 1840, A : 
Spiraea betulifolia Rothr. Rep. Smithson. Inst. 1867: 445, name. 1867.—Greene, Pittonia 2: 219. 
1892. Not S. detulifolia Pallas, 1784. . 
Spiraea Beauverdiana Steveni C. K. Schneid, Bull. Herb. Boiss. II. 5: 348. 1905. 
A low shrub, 4-6 dm. high ; bark of twigs dark-brown, finely puberulent, the outer layer 
sooner or later exfoliating; petioles 1-2 mm. long; leaf-blades elliptic or oval, 1-4 cm. 
long, crenate except at the base, minutely puberulent or glabrate, usually rounded at both 
ends; inflorescence flat-topped, 2-5 cm. wide, its branches puberulent; hypanthium hemi- 
spheric, scarcely 1 mm. deep, puberulent ; sepals ovate, acute, 1 mm. long, at last reflexed ; 
petals white, orbicular, about 2 mm. long; follicles oblanceolate, pubescent, 3-4 mm. long, 
their beaks about 1 mm. long; seeds linear-lanceolate, tapering at each end. 
TYPE LOCALITY: Kamchatka. . ; 
DISTRIBUTION : Alaska to the Mackenzie ; also in Kamchatka. 
5. Spiraea splendens Baumann; K. Koch, Monats. Ver. Bef. 
Gart. Preuss. 18: 294. 1875. 
Spiraea betulifolia rosea A. Gray, Proc. Am. Acad. 8: 381. 1872. 
Spiraea lucida rosea Greene, Pittonia 2: 221. 1892. 
Spiraea rosea Koehne, Deuts. Dendr. 218. 1893. Not S. rosea Raf. 1838. 
Spiraea arbuscula Greene, Erythea 3: 63. 1895. 
A shrub, 6-12 dm. high, with erect branches; bark of the twigs dark reddish-brown, finely 
puberulent, the outer layer exfoliating the following year ; leaves subsessile or with very 
short petioles; blades oval, rounded at both ends, 2-3.5 cm. long, dull, thick, finely puberu- 
lent keneath, serrate or dowbly serrate, but usually entire at the base, strongly veined beneath ; 
inflorescence small, dense, flat-topped or rounded, 2-4 cm. (seldom 5 cm.) high and broad, 
its branches finely puberulent; hypanthium hemispheric, glabrous or nearly so, 1.5 mm. 
deep; sepals triangular, acute, erect ormerely spreading ; petals rose-colored, obovate, about 
