ROSACEAE 607 
1. O. opulifolius (L.) Kuntze. Shrub 1—3 m. tall: leaf-blades 3-8 cm. long, 
acutely lobed: sepals ovate, 2.5-3.5 mm. long: follicles 8-10 mm. long, acute. 
P. opulifolius Maxim.]—Rocky soil and 
river banks, various provinces, Tenn. to 
Mich., Que., and Va.—Spr.-sum. 
2. O. australis Rydb. Shrub with glabrous 
nu qos ee bow blades broadly ovate, 
em. long, deeply 3-lobed and 
pomi othed, s d or froneat at the 
þase: follicles agai 5, glabrous, 3-6 m 
ace acute.— Wooded slopes, Blue Ridge, S 
C. to Va.—Sum 
O. alabamensis Rydb. Shrub, with stel- 
ofte indis tine tly 3-lobed, doubly crenate, 
stellate-pubescent, at least beneath, acute or rounded at the base: inflorescence 
densely stellate: follicles 3-5, permanently stellate, about 8 mm. long.— 
Thickets and river-bottoms, Coastal Plain and Piedmont, Ala., Ga., and S. C.— 
Sum. 
4. O. stellatus Rydb. Low shrub, with decidedly pm foliage: leaf- 
blades 1—4 cm. long: sepals narrowly ovate, 2—2.5b mm. long: follicles mostly 
4, about 5 mm. long.—Stream-banks, Coastal Plain, Fla. and Ga.— 
| 2. SPIRAEA [Tourn.] L. Shrubs. Leaf-blades toothed or lobed. Flow- 
ers corymbose or paniculate. Corolla white, pink, or rose. Stamens numerous, 
accompanied by lobe-like staminodia.  Carpels usually 5, mostly stipitate: 
styles clavate: stigmas minute and oblique.  Follieles not inflated.—About 
70 species, natives of the north aes zone.—SPIREAS.—Several species are 
extensively grown for ornament. 
Inflorescence elongate, paniculate, ovoid or conic. I. SALICIFOLIAE. 
Inflorescence flat-topped, corymbose. II. CORXMBOSAE. 
I. DE 
Sepals merely spreading: disk obsole 
Inflorescence glabrous: leaf- dos "broadly oblanceolate to 
p 
obovate. S. latifolia. 
Inflorescence pubescent: leaf-blades narrowly oblanceolate. 2. S. alba. 
Sepals early reflexed: disk prominen 
b err glabrous: leaf-blades lanceolate to elliptic-lanceo- 
3. S. subcanescens. 
Follicles pubescent: leaf-blades elliptic or oval, varying to 
ovate or elliptic-ovate. . S. tomentosa. 
II. CoRYMB 
Vu dun edem turbinate, tapering to the base: E glau- 
cous ea 5. S. virginiana. 
PAS campanulate, abruptly contracted at the base: 
leaf-blades scarcely glaucous beneath. 6. S. corymbosa. 
1. S. latifolia (Ait.)-Borkh.1 — with glabrous twigs: leaf-blades cages! 
oblanceolate to obovate, 2-8 cm. long, sharply serrate, glabrous or nearly s 
1 Formerly included in vn salicifolia, a native of Siberia and eastern 
Russia. 
