SoUdago. COMPOSIT.E. 159 



lines long : bracts of the involucre rather rigid, glabrous, oval to linear-oblong : rays 3 to 6, 

 rather fewer than di^k-flo\vers: akenes minutelv pubescent. — Jour. Acatl. Philad. vii. 327 • 

 Torr. & Gray, Fl. ii. 220. .>. rotmdifulia, DC. Prodr. v. 302, & S. srakrrimn, Torr. &, Gray' 

 1. c, broad-leaved form. .V. decemflora. Gray, PI. Lindh. ii. 223, not DC.— Drv hills and 

 prairies, S, W. Illinois to Arkansas, ^X . Louisiana, and Texas; flrst coU. by Cerlandier and 

 Xntlall. 



u. Scabro-puberulent, somewhat cinereous, sraall-leaved : the lateral ribs obsolete. 

 S. sparsiflora, Gr.w. Founded on incomplete specimens (branches), of doubtful affinitv, 

 scabrous rather than puberulcnt, leafy into the narrow and strict branches of the panicle : 

 leaves all small (the larger hardly an inch long), lanceolate-linear, rather acute at both ends, 

 rigid, entire, ^sith lateral ribs and \eins almost obsolete : heads somewhat scattered or few 

 in the short imperfectly racemitorm and somewhat secund clusters, 3 lines long : bracts of 

 the involucre rather small, oblong-linear, barely obtuse : rays 6 to 10, little surpassing the 

 disk. — Proc. Am. xVcad. xii. .58; Rothr. in Wlieeler Rep. vi. 146. — S. Arizona, near Camp 

 Lowell, Rothrock. Llano Estacado, X. W. Texas on the borders of Xew ;\Iexico, B^'/dofr. — 

 To which must be added 



Var. SUbcinerea, Gray. Quite cinereously puberulent, the leaves scabro-puberulent : 

 heads more crowded and secund in tlie virgate panicles : rays more conspicuous. — Proc. 

 Am. Acad. xvii. 197. — Rncker Valley, S. Arizona, L^mmon. Base of stem and lower leaves 

 unknown : the affinity decidedly with .V. nemoralis. Also a form between this and S. Cana- 

 densis, var. canescens, with larger heads, &c., coll Xew Jle.xico in the Mogollon !JIountains, 

 1881, Puisbi/. 



:^ = ^ Leaves thinnish, puberulent but green, broad, acute, divergenth' triplinerved and 

 veiny: branches of the loose panicle racemiform, secund, leafy: bracts of the involucre nar- 

 rowly oblong, obtuse, outer with greenish tips : rays few. 



~S. Drummondii, Tore. & Gray. Soft-puberulent : stem 3 feet high, freely branched: 

 leaves ovate or broadly oval, nearly or quite glabrous above ; cauline copiously serrate, com- 

 -• monly acute at both ends, almost petioled (lower 3 or 4 inches long and 2 or more broad) ; 

 those of the flowering branches numerous even through' the inflorescence, from 2 inches 

 down to a quarter-inch long, obtuse, sparingly denticulate or entire : rays 4 or 5, often 

 3-lobed, rather large. — Fl. ii.^17. .¥. ulmifoUa, Hook. Comp. Bot. JXag. i. 97. — S, W. Illi- 

 nois and Missouri to Louisiana, flowering late ; first coll. by Drummond. Allied in some 

 respects to .S. mgosa and S. amplexicaulis. 



##:*## Heads in a compact and corymbifnmi thyrsus or cyme: radical leaves mostly 

 long-petioled and with prominent midrib: akenes except in the firtt species wholly glabrons. — 



ClIKYSIBOS^. 



H— Leaves, even the radical, not triplinerved, flat; cauline sessile, very numerous : involucre of 

 oblong-linear to oval faintly striate bracts: akenes very glabrous. 



S. rigida, L. Somewhat cinereous with a short and dense, either soft or (in age) rather 

 scabrous pubescence : stem stout, 2 to o feet high (rarely more dwarf) : leaies rigid, obscurely- 

 serrate or entire ; radical and lowest cauline oval or oblong, rounded at both ends or acute 

 at base, 3 to 7 inches long ; upper cauline ovate-oblong, gradually smaller upward, witli 

 slightlv clasping or decurrent base : clusters dense : heads about 5 lines long, campanulate, 

 many- (over 30) flowered: involucral bracts broad: rays 7 to 10, rather large: akenes 

 turgid, 12-1 5-nerved. — Spec. ii. 880; Ait. Kew. iii. 216; Michx. Fl. ii. 118; Ell. Sk. ii. 390 ; 

 Torr. & Gray, Fl. ii. 208. .S'. grandijlora, Raf. in Med. Rep. hex. 2, > . 359, & Desv. Jour. 

 Bot. i. 226. — Dry and gravelly or sandy soil, Canada to the Saskatchewan, south to the upper 

 part of Georgia, southwest to Texas and W. Colorado. Varies with smaller heads, looser 

 inflorescence, and greener more scabrous leaves, in Texas, &c. 



S. corymbosa, Ell. Stem and leaves (except their margins) quite smooth and glabrous, 

 green: heads (3 to 5 lines long) in looser inflorescence: akenes short, turgid, lO-nerved: 



• otherwise as in the preceding, of which it may be a glabrous variety. — Sk. ii. 378 ; Torr. & 

 Grav, 1. c. ; not of Poir. Suppl. v. 461, which is a form of .S. Virfinurea. — Upper and middle 

 Georgia and Alabama; first coll. by Mr. Jackson : apparently also in Texas. 

 "S. Ohioensis, Riddell. Glabrous and smooth throughout : stem slender, 2 or 3 feet high : 

 radical and lower cauline leaves lanceolate or elongated-oblong, 5 to 9 inches long, balf-inch 

 to an inch or more wide, attenuate at base, almost entire; upper lanceolate, sessile by a 



