266 XLVI1L ROSACES. SPIRJBA. 



* Leaves without stipules. 



1. S. rOMENTdsA. Hardback. 



Ferni| mous-tomentose ; Ics. simple, ovate-lanceolate, smoothish above, 

 inequally se.rrate ; roc. short, dense, aggregated in a dense, slender, terminal 

 panicle ; cartels 5. A small shrub, very common in pastures and low grounds, 

 Can. and U. 15. Stem very hard, brittle, consequently troublesome to the scythe 

 of the hay-maker. Leaves 1 2' long, % as wide, dark green above, rusty white 

 with a dense tomentum beneath, crowded, and on short petioles. Flowers 

 small, very numerous, with conspicuous stamens, light purple, forming a slen- 

 der, pyramidal cluster of some beauty. The persistent fruit in winter furnishes 

 food for the snow bird. Jl. Aug. 



2. S. SALICIFOLIA. (S. alba. Z?w.) Queen of the Meadow. Meadow-sweet, 

 Nearly glabrous ; Ivs. oblong r obovate or lanceolate, sharply serrate ; roc. 



forming a more or less dense, terminal panicle ; carpels 5. A small shrub in 

 meadows, thickets, U. S. and Brit. Am. Stems 3 4f high, slender, purplish, 

 brittle. Leaves smooth, 1J 3' long, \ \ as wide, acute at each end, petiolate, 

 often with small leaves in the axils. Flowers white, often tinged with red, 

 small, numerous, with conspicuous stamens, in a more or less spreading pani- 

 cle. Jl. Aug. f 



3. S. ARUNCUS. Gooffs Beard. 



Herbaceous ; Ivs. membranaceous, tripinnate ; Ifts. oblong-lanceolate, acu- 

 minate, the terminal ones ovate-lanceolate, doubly and sharply serrate ; fls. 9 cT> 

 very numerous ; carpels 3 5, very smooth. On the Catskill Mts., N. V. to Ga. 

 Torrey <$ Gray. Stem 4 6f high, branching. Flowers very small, white, 

 in numerous, slender racemes, forming a large, compound panicle. Jn. J 1. 

 0. Fls. in very long, virgate racemes. Georgetown, D. C. Bobbins. 



4. S. CORYMBOSA. Raf. (S. chamcedrifolia. PA.) Corymbose Spiraea. 

 Li's, ovate or oblong-oval, incisely and unequally serrate near the apex, 



whitish with minute tomentum beneath ; corymbs large, terminal, pedunculate, 

 fastigiate, compound, dense, often leafy ; sty. and carpels 3 5. Mountains, 

 Penn. Fauquier Co., Va. Dr. Robbins, to Ky. S. to Flor. Stem slightly pu- 

 bescent, reddish, 1 2f high. Leaves nearly smooth above, entire towards the 

 base, 2 3' by f If. Flowers innumerable, white or rose-colored, in a co- 

 rymb 4 6' broad. May, Jn. f 



5. S. HYPERICIFOLIA St. Peter's Wreath. Lvs. obovate-oblong, obtuse, ta- 

 pering at base to a petiole, entire or slightly dentate, nearly smooth ; fls. in 

 pedunculate corymbs or sessile umbels ; pedicels smooth or pubescent ; segments 

 of the calyx ascending. Cultivated in gardens and shrubberies. Shrub 3 5f 

 high, nearly smooth in all its parts. Flowers white, in numerous umbels, ter- 

 minating the short, lateral branches. Pedicels as long as the leaves. May. f 



* * Leaves accompanied with stipules. 



6. S. SORBIFOLIA. Sorb-leaved Spircea. Shrub stout, with straggling branches 

 and rough bark ; Ivs. unequally pinnate ; lateral Ifts. oblong-lanceolate; termi- 

 nal one larger, irregularly lobed, all acuminate, sessile and doubly serrate ; fl*. 

 in thyrsoid panicles, large, numerous, white. In shrubberies. Height 4 Gr'. 

 May.f 



S. 7. OPULIFOLIA. Nine-bark. 



Nearly glabrous ; Ivs. roundish, 3-lobed, petiolate, doubly-serrate ; corymbs 

 pedunculate ; carpels 3 5, exceeding the calyx in fruit. A beautiful shrub, 

 3 5f. high, on the banks of streams, Caw. la. ! Mo. S. to Ga., rare. Bark 

 loose, outer layers deciduous. Leaves 1 2' long, nearly as wide, sometimes 

 cordate at base, with 3 obtuse lobes above, petioles 6 9" long. Corymbs re- 

 sembling simple umbels, hemispherical, 1 2i' diam. Flowers wMte, often 

 tinged with purple. Follicles diverging, smooth, shining, purple, 2-seeded. Jn.f 



8. S. LOBATA. Siberian Red Spiraa. 



Herbaceous; Ivs. pinnately 3 7 foliate, often with smaller leaflets inter- 

 posed, lateral Ifts. of 3, lanceolate lobes, cuneate at base, terminal one large, 

 pedately 7 9-parted, lobes all doubly serrate; slip, reniform; panicle large, 

 cvmosely branched; fls. large, deep rose-color; carpels 6 8. An herb of ex- 



