362 COMPOSITE. Solidago. 



12. Solidago arguta, Ait. Sharp-toothed Golden-rod. 



Whole plant smooth, except the minutely ciliafe margins of the leaves ; stem strict ; radical 

 and lower cauline leaves large, elliptical or lanceolate-oval, veiny, sharply serrate, acuminate, 

 tapering into winged and more or less ciliate petioles ; the others lanceolate, tapering at each 

 end, sessile, entire or sparingly serrate ; racemes dense, at length elongated and recurved, 

 forming a corj'mbosc panicle ; scales of the involucre somewhat carinate, smooth, much 

 appressed, oblong, rather obtuse; rays 8-12, small; disk-flowers about 10; achenia 

 smoothish. — AiY. Kew. (ed. 1.) 3. p. 313; Pursh, fi. 2. p. 538; DC. prodr. 5. p. 333; 

 Torr. <^ Gr.Jl. N. Am. 2. p. 214, not of Muhl. <^c. S. ciliaris, Muhl. in Willd. sp. 3. 

 p. 2056; Beck, bot. p. 189; DarUngt.fl. Cest.p. 455; DC. prodr. I. c. p. 331. 



Stem 3-4 feet high, terete, somewhat striate, often purple. Radical leaves (including 

 the petioles) often nearly a foot long and 2-3 inches wide, rather coriaceous ; upper cauline 

 leaves 2-4 inches long and 5-8 lines wide, mostly entire, obscurely tripUnerved. Heads 

 small, very numerous, disposed in a long racemose corymbose panicle, which is at first 

 contracted, but at length somewhat spreading. Pedicels and branches smooth. Scales of the 

 involucre greenish yellow, the outer ones ovate-oblong. 



Meadows and fields ; rather common. August - September. It varies with narrow leaves, 

 when it is the S.juncea of Aiton. 



13. Solidago Muhlenbergii, Torr. 5f Gr. Muhlenberg's Golden-rod. 



Stem angled, smooth, leaves large and thin, very smooth on both sides, sharply and 

 strongly serrate ; the radical ones ovate, on winged petioles ; the cauline elliptical-lanceolate, 

 strongly acuminate, tapering at the base, the uppermost somewhat entire ; racemes pubescent, 

 short, spreading, disposed in Ein elongated open and rather slender panicle ; scales of the 

 involucre oblong-linear, smoothish ; rays 5 - 7, rather large ; disk-flowers 12-14; achenia 

 smooth. — Torr. ^ Gr. fi. N. Am. 2. p. 214. S. arguta, Muhl. cat. p. 79 ; DarUngt.fi. 

 Cest. p. 458, not of Ait. 



Stem 2-3 feet high, simple, or branched at the summit. Leaves with very acute and 

 saUent teeth, nearly entire towards the base and apex. Panicle open, but the racemes rather 

 short and seldom recurved. Heads crowded, larger than in the preceding species. 



Low grounds, and shady moist places ; rather rare. August - September. Differs from 

 the preceding in its more slender habits, thinner leaves, narrower and more membranaceous 

 involucral scales, less numerous rays, etc. 



