414 ROSACEA. Spirjea. 



in DC! prodr. 2. p. 542 (& 0. tomentella) ; Hook. ! fl. Bor.-Am. 1. p. 

 171 ; Darlingt.fl. Cesl. p. 298. 



p. mollis : leaves tomentose beneath with a stellate pubescence ; the lobes 

 often elongated, acute, and somewhat incised ; pedicels and calyx tomentose. 

 — Hook. ! I. c, Sc bat. Beechey, suppl. p. 338. S. capitata, Purs/i,fl. l.p. 

 342. S. ribifolia, Nutt. ! mss. 

 -f- y. faitciflora : leaves smaller, nearly glabrous ; corymbs few-flowered; 

 'carpels 2-4, or sometimes solitary, tomentose. — Hook. I. c. S. monoijj'na, 

 Torr. ! in ann. lye. NeivYork, 2 p. 194. S. pauciflora, Nutt..' mss. 



£. ferruginea (Nutt. ! mss.) : leaves and branchlets tomentose throughout 

 with a brownish stellate pubescence ; carpels glabrous. 



Banks of streams, Canada ! (as far north as the Saskatchawan) to Geor- 

 gia ! and Missouri ! /8. Oregon ! and CaHfcrnia ! y. Rocky Mountains in 

 about lat. 40°, Dr. James! Blue Mountains, Oregon Territory, Nuttall ! 

 and at Kettle Falls of the Oregon, Douglas, e. Florida and Georgia, Nuttall! 

 and Alabama, Dr. Leavenworth, ex Nv.tt. June. — Stem 3-5 feet high ; the 

 old bark loose and detaching itself. Petals white or tinged with purple, 

 showy. Seeds very bitter. — Nine-bark. 



§ 2. Flowers perfect : disk free at the margin, mostly crenate or icith glandu- 

 lar teeth or lobes : carpels distinct, not inflated : ovules mostly several, pen- 

 dulous : seeds mostly with a loose membranous testa, attenuate at each end: 

 shrubs iviih entire or serrate exstipulatc leaves. — EuspiRiEA. 



* Flowers in fastigiate compound corymbs : ovules 5-8. 



2. S. betulcefolia (Pallas) : leaves broadly oval, or ovate, glabrous, on short 

 petioles, serrate, ofteu slightly incised, the lower ones sometimes nearly en- 

 tire ; corymbs compound, fastigiate, many-flowered, often leafy ; segments 

 of the calyx as long as the tube ; carpels 5, glabrous. — Pall. fl. Ross. t. 16 ; 

 Seringe, in DC. prodr. 2. p. 554 ; Hook. ! fl. Bor.-Am. 1. p. 172. S. cha- 

 maedrifolia, Pursii ; Cham. &■ Schlecht ! in Linncea, 2. p. 2 (ex auct. I. c. 6. 

 p. 589) ; Hook. I. c. 



/?. leaves eUiptical (small), glabrous or a little pubescent; ovaries (al- 

 ways?) pubescent. — S. chamfedrifolia /?. Hook. Sf Am. ! bot. Beechey, p. 

 123. S. charasedrifolia. Pall. I. c. 1 not oiLinn.! 



N. W. Coast ! to the Blue Mountains of Oregon ! and the Rocky Moun- 

 tains in lat 52°-54°. /?. Kotzebue's Sound, Capt. Beechey! — Stem 8-20 

 inches high ; the branches erect, reddish or purphsh, glabrous. Leaves 1-2 

 inches long, often acute at the base, serrate throughout or sometimes entire 

 towards the base. Flowers white, much crowded on the branches of the 

 broad and flat corymb. — The S. densiflora, Nutt. ! mss. seems only to differ 

 from the ordinary forms of this rather variable but well-marked species, in 

 having pale rose-colored petals. S. chanicedrifolia, Linn, is not a North 

 American plant. Small specimens of this species have been mistaken for 

 it, probably on account of their agreement with the figure of Pallas under 

 this name, but the original plant of Gmelin is wholly dilFcrent, and belongs 

 to the section Chanifedryon, where Seringe has placed it, having the sim- 

 ple umbel-like corymbs of S. hypericifolia, &c. We have not at^ hand ihe 

 figure in the Botanical Register, but conclude from Hooker's remark that Dr. 

 Lindley has talien the same view of the species. 



3. S. corymbosa (Raf.) : minutely pubescent or glabrous; leaves oval or 

 ovate, on short petioles, whitish beneath, entire towards the base, unequally 

 and often doubly serrate towards the apex ; corymbs large, pedunculate, 

 several times compound, fastigiate, many-flowered, often leafy ; segments 



