COMPOSIT.E. (composite FAMILY.) 233 



entire ; heads rather large, 9-1 2-flo\vered, forming a narrow cumpound raceme 

 at the summit of the stem and branches ; rays mostly wanting ; scales of the 

 involucre oblong, obtuse ; achenia pubescent. — Dry pine barrens, IMiddle 

 Florida. Oct. — Stem 2° high. 



4 ■<- Lowest leaves cordate, on long petioles: Iteads in simple or compound 

 racevies, 8-lO-Jlowered : pappus rigid, equalling or shorter than the hairy 

 achenia. 



36. S. amplexicaulis, Torr. & Gray. Pubescent and roughish ; stem 

 slender, sparingly branched above ; leaves sharjjly serrate, acute, the lowest 

 broadly cordate ; those of the stem ovate, abruptly contracted into a broadly 

 winged and clasping petiole, the uppermost small, sessile, and entire ; racemes 

 slender, often simple; rays 1 -3 ; pappus as long as the acheuium. — Dry 

 open woods. Oct. — Stem 2° -3° high. 



37. S. COrdata, Short. Pubescent ; stem sparingly branched above ; 

 leave.s acute, on wingless petioles; the lowest large, coarsely serrate, cordate, 

 the others ovate, sharply serrate, on short petiole.-* ; the uppermost entire, ses- 

 sile ; racemes compound, terminating tiie spreading branches, composed of 

 crowded cluster-like racemes ; the lower ones scattered ; scales of the 8-10- 

 flowered involucre rigid, obtuse ; rays .5 - 6 ; pappus much shorter tiian the 

 acheuium. (BrachychiEta, Torr. ^ Gray.) — Mountains of Georgia and North 

 Carolina. Sept. — Stem 2° - 3° high. Lowest leaves 3' - 5' wide. 



5 -I- Leaves nearly sessile, more or less plainly 3-ribbed : panicles recurved. 



38. S. Missouriensis, Nutt. Glabrous; stem simple, rigid, l°-2° 

 high; lea\es rather rigid, lanceolate, sharply serrate above the middle, the 

 lowest tapering into a petiole, the upper linear, entire ; panicle short, dense ; 

 heads 16 -20- flowered ; rays 8- 12; achenia slightly pubescent. — Dry soil, 

 Tennessee, and westward. July. 



39. S. Gattlngeri, Chapm. Low (1° high), simple, glabrous; lower 

 leaves lanceolate, rather obtuse, tapering into a petiole, entire, or obscurely 

 denticulate near the apex, the u])permost (^' or less long) passing into the 

 oblong-linear obtuse bracts of the widely spreading flat panicle ; heads ovoid ; 

 16 -20-flowered, the oblong scales obtuse ; rays few, notched ; pappus coarse, 

 shorter than the flowers; ovary smooth. — Rocky barrens of Tennessee 

 {Gattinger). 



40. S. nemoralis, Ait. Plant grayish, minutely pvibescent and rough- 

 ened ; stem mostly simple : leave.s oliscurely 3-ribbed ; tlie lowest spatulate- 

 oblong or lanceolate, serrate ; the upper lanceolate, acute, narrowed toward 

 the l)ase, mostly entire ; panicle dense, oblong or pyramidal, recurved ; heads 

 10- 12-flowered ; rays 6-7; aclienia hairy. — Old fields and open woods, 

 common. — Stem 1° - 2° high. 



41. S. Leavenworthii, Torr. & Gray. Stem .simple, minutely puljes- 

 cent and roughish ; leaves very numerous, smooth, linear-lanceolate, entire ; 

 the lowest sparingly serrate; panicle pyramidal; heads rather large ; rays 

 10- 12 ; achenia pubescent. — Damp soil, Florida to South Cavoliiia. Oct. — 

 Stem 2° - 3° high. Leaves 2' - 3' long, 3" - 4" wide, faintly ribbed. 



