156 COMPOSITE. SoUdago. 



Var. estraria, Geat, 1. c. A foot or two high, robust : leaves broader (the largest 

 sometimes an iuch wide), sparingly serrate or entire : heads rather larger : rays more con- 

 siiicuous. — Dry ground, in the mountains, Colorado to S. Arizona, Parry, Hall & Harbour, 

 (Jreene, Prmijle, Lemmon, &c. 



~S. Gattingeri, Chapm. ined. Slender, mostly strict and barely 2 feet high: branches and' 

 inflorescence perfectly smooth and glabrous : leaves ciliolate ; lowest cauline and radical 

 lanceolate-spatulate, appressed-serrulate, obviously triplinerved ; upper cauline mainly entire 



. and without lateral ribs, oblong-lanceolate and an inch or so long, and the upper reduced to 

 half or (juarter inch, but near the inflorescence very small and bract-like : racemiform clus- 

 ters of small heads open and spreading, not recurving, disposed to form a corymbiform very 

 naked panicle : involucral bracts oblong, very obtuse, yellowish in the dried plant : flowers 

 15 to 20 in tlie head : akenes appressed-puberulent or the lower part glabrous. — .S. Missoiiri- 

 eiisis, var. pumih, C'liapm. Fl. Suppl. 627. — Eocky barrens and cedar glades, Rutherford Co., 

 Tennessee, Galtinger. Between the preceding and the foUoiiiug. 

 S. Shortii, Torr. & Gray. Slender, 2 to 4 feet liigh : upper part of stem and flowering 

 branches scabrous with minute appressed puberulence : leaves bright green, oblong-lanceo- 

 late, rather short (longer only 2 or 3 inches long, toward the inflorescence moderately 

 reduced), acute, mostly with a few small serratures: panicle oblong or pyramidal; its 

 racemiform clusters commonly slender and soon recurving: heads narrow, 10-14-flowered : 

 involucral liracts narrowly oblong : akenes pubescent. — Tl. ii. 222. — Rocks, at the Falls of 

 the Ohio, near Louisville, Rofinesque, Short. K. W. Arkansas, F. L. Hurveij. 



h. Leaves with entire and smooth margins; rays larger. 

 S. Marslialli, Eothe. Tall (only the upper part of stem known), slender : leaves linear- 

 lanceolate, acute ; the lateral ribs mostly obscure ; panicle naked, of loose recurving racemes ; 

 the rhachis and slender pedicels setaceously bracteate : heads 3 lines long, rather broad : 

 bracts of the involucre broadish, of firm texture, mostly greenish on the back ; rays about 8, 

 and disk-flowers more numerous: akenes pubescent. — Eothrock iu Wheeler Eep. vi. 146. 



— Mountains of S. Arizona, near the Chiricahua Agency, Lieut. Mursliull. 



= = Leaves thinner, sometimes membranaceous: bracts of the involucre cliiefly linear, obtuse: 

 branches and upper part of the stem not rarely soabrous-puberulent or minutely hairy. 



S. Leavenworthii, Tobk. & Gray. Stem strict, slender, rigid, 2 to 4 feet high, scabro- 



puberulent even to below the middle: leaves mostly linear (3 or 4 inches long and as many 



^ lines wide), very sharply and finely serrate, both ribs and veins inconspicuous: heads 3 lines 



long, in an ample open panicle: involucral bracts thin, linear, obtuse: rays 10 or 12, small. 



— Fl. ii. 22'i; Chapm. Fl. 214. — Damp soil, Florida to S. Carolina, near tlie coast, Learen- 

 worth, Ch'jpman. 



S. rupestris, Raf. Stem lax, 2 or 3 feet high, smooth nearly to the small panicle : leaves 

 membranaceous, linear-lanceolate, sparsely and sharply serrulate or denticulate, or the upper 

 . entire (1 to 3 inches long) : heads very small (barely 2 lines long) : raws 4 to 6, small. — 

 Ann. Xat. 14; Torr. & Gray, Fl. ii. 225. — Bucky banks of streams, along the Oliio Eiver, 

 Kentuclcy, Indiana, and Western Virginia. Probably only an extreme glabrous form of 

 ^. (.'anadriisis. 



S. serotina, .'iit. Stem stout, 2 to 7 feet liigh, very smooth and glabrous up to or near 



the ample panicle, sometimes glaucous : leaves commonly ample, lauceolatc or broader (3 to 6 



inches long), sharply and saliently serrate, in the typical plant glaln-ous both sides: heads 



. crowded, rather large and full (3 lines loug) : rays 7 to 14, moderately large and conspicuous : 



bracts of the involucre broadly linear or linear-oblong. — Kcw. \\\. 211; Gray, Proc. Am. 



Acad. xvii. 179, 196. S. i/ii/anlea, AVilld. Spec. iii. 205G, and subsciiuent authors. .?. plabra, 



Desf. Cat. ed. 3, 402 ; DC. Prodr. v. 331. S. Jhujrans, Ilort. Par., not AViUd. .^. PUcheri, 



Nutt. Jour. Acad. Philad. vii. 101, & Trans. Am. Phil. Soc. 1. c. 320, forms with broad and 



comparati\ dy short leaves and rather smaller hcails. 5. elongata, var., Torr. & Gray, 1. c, in 



li:irl,. — Moist or rich soil, Newfoundland to Brit. Columbia, ()rcgon, and south to Texas. 



Passes insensildy into 



=«- ^ Var. gigant6a, Gray, 1. c. Commonly tall, 5 to 8 feet high : leaves with the lateral 



^ ribs n)iii'c prominent beneath, and these nmi-c or less |)ilose-pubes(cnt or hispidulous, 



sometimes the veins or even the wliole under surface pubescent. — .s\ i/li/milm. Ait. ). c. 



S. serollna, Willd. ; Torr. & Gray, etc. — Chiefly iu the iVtlautic Stales! from Canada to 



