ORDEK 70. COMPOSITE. 169 



33 S. bracliypli^lla Chapm. Pubescent; leaves spatulate to round-oval, perrulatc ; 

 rac. spreading; scales obtuse, rigid ; disk-fls. 35, rays 0. Dry soils, Ga. Fla. 3f. 



34 S. altissima L. Hairy, tall ; Ivs. lanceolate, very veiny, rough and wrinkled, the 

 lower serrate ; scales acute ; rays 68. Fields : common. 3 5f. Variable. 



35 S. Drummondii T. & G. Minutely velvety ; Ivs. ovate or broad-oval, acute both 

 ways, sharply serrate, veiny ; scales oblong-obtuse ; rays 4-5. 111. opp. St. Louis. l-2f. 



36 S. RadulaN. Rough-downy, simple; Ivs. obloug-spatulate, tapering to base, ser- 

 rate above, very rough and rigid ; hds. small, rays 5, disk-fls. 3-6. 111. to La. 1 2f. 



37 S. amplexicaiilis T. & G. Rough-pubescent, subsimple ; Ivs. broad-cordate to 

 ovate, serrate ; petioles wing-clasping ; rays 13. Dry woods, W. Fla. to La. 2 3f. 



38 S. ulmifolia Willd. Stem glabrous, with hairy branches ; Ivs. thin, elliptic-ovate, 

 acuminate, serrate, tapering to base, smooth above, villons beneath ; raceme recnrved- 

 epreading; hds. small, scales acute, rays 3 4, disk-fls. 34. Thickets, N. and W. 3f, 



39 S. Boottii Hkr. Stem glabrous, with hairy branches ; Ivs. ovate to lance-ovate, 

 pointed at both ends, serrate ; pan. long, loose ; hds. middle-size, scales oblong, ob- 

 tuse ; rays 25, disk-flowers 812. Sandy soils, S. 2 3f. Varies with stem downy. 



40 S. liiioides Sol. Smooth throughout, slender, simple; Ivs. lanceolate, finely ser- 

 rate ; scales oblong-linear, obtuse ; hds. small, rays 1 4, disk 4 5. Bogs, near Bos- 

 ton to N. J. 12 20'. Racemes of the panicle short, secund, at length spreading. 



41 S. JTIuhlenbergti T. & G. St. furrowed ; Ivs. smooth both sides, strongly ser- 

 rate, ovate to lanceolate, pointed both ways ; rac. axillary, remote, spreading ; hda. 

 15-20-flowered, scales linear, obtuse. Damp woods, N. H. to Pa. 2 3f. 



42 S. pa tula Muhl. St. angular-striate ; Ivs. elliptic, acute, serrate, very rough above, 

 the lower oblong-spatulate ; panicle loose ; scales obtuse, flowers 12-15. N. and W. 3f. 



43 S. clliptica Ait. Glabrous, leafy ; Ivs. elliptical, acute both ways, subserrate ; pan. 

 pyramidal ; rays very short, 58, disk-fls. 67 ; scales obtuse. Marshes, R. I. to Ga. 



/3. ISlHollil. Panicle more widely spreading. South. (S. Elliottii.T. & G.) 



44 S. argitta Ait. Strict; Ivs. smooth, unequally serrate with divergent teeth, ob- 

 long-ovate to elliptical ; pan. coryrnbous ; rays about 10, disk-fls. 910 ; cyp. smooth 

 Woods, meadows : common. 3f. Plant smooth and shining. 



/3. jttnrea. Leaves lanceolate, upper entire ; rays twice longer than involucre. 



45 S. neglecta T. & G. St. striate ; leaves lanceolate to linear, the lower divergent- 

 serrate, long-stalked ; panicle oblong or pyramidal ; rays 610, disk-flowers 712 ; 

 cypeela smooth. Swamps, Me. to Penn., and W. 3 4f. Root leaves 612'. 



46 S. Ohieiisls Riddell. Entirely smooth ; Ivs. entire, lanceolate, flat, obtuse, to ob- 

 long-lanceolate, abruptly-acute, the lower on long stalks ; hds. numerous, large, 15-20- 

 flowcred, rays about 6. Meadows and prairies, West N-Y. to Ind. and Wis. 2 3f. 



47 S. Riddellii Frank. Stout, nearly smooth; root Ivs. very long, lance-linear, long- 

 pointed, on long petioles, the cauline clasping, carinate, acute ; heads 20-24-flowered, 

 densely clustered in the level corymb. Wet prairies, O. to Mo., and N. 15 30 7 . 



48 S. eorymbosa Ell. Glabrous, with the corymbous branches hirsute ; Ivs. sessile, 

 lance-oV thick, rigid, smooth ; hds. large, rays 10, disk-fls. 20; fr. smooth. Ga. 4*M5f. 



49 S. ^lougUtcnii T. & G. Low, smooth; Ivs. lin. -lanceolate, acutish, flat, entire, 

 tapering to base or petiole ; hds. few, large, 20-30-flwd.. rays 9 or 10. N. Y. Mich. 1 2f. 



50 S. rigida L. Stout, rough-hairy ; Ivs. rigid, ovate to oblong, serrate, upper minute ; 

 hds. very large (4-5"). scales obtuse, rays 7-10, disk-fls. 25 + . Diy. Ct., S. and W. 3-5f. 



51 S. spitliamaea Curt. Low, villous ; Ivs. lance-oval to oblong, thin, sharply serrate ; 

 hds. middle-size ; scales lanceolate, acute : rays <i 8, disk-fls. 1520. High mts. N. Car. 



52 S. lanceolata Ait. St. angular, hairy, much branched ; Ivs. lin. -lanceolate, entire, 

 3-veined : rays minute, about 17. disk-fls. 10. Meadows, copses: com. 2^1f. Fragrant. 



53 S. teuiiilolia Ph. St. angular, smooth, much branched ; Ivs. narrowly linear, 1- 

 veined, the axils leafy; corymb open, loose ; rays about 10. Dry fields, coastward. 



27. BIGELOVIA, DC. Fls. 34, all tubular, ? . Rays 0. Invol. cy- 

 lindrical, as long as the flowers. Scales rigid, linear, closetyimbricated. 



