232 COMPOSITE. (COMPOSITE FAMILY.) 



3 -i Leaves very numerous, gradually diminishing in size upward, veiny, sessile, 

 or the lowest narrowed into a short /ittiole: heads small. 



28. S. rugosa, Mill. Stem hirsute; leaves ovate or oblong, acute, ser- 

 rate, rough above, pubescent, especially on the veins beneath, often rugose, 

 prominently veined ; panicle leafy, often narrow and elongated ; the racemes 

 slender and recurved; scales of the 10-15-fiowered involucre linear; rays 

 6-9, small; achenia pubescent. Low thickets, Florida, and northward. 

 Sept. -Oct. Stem 2 - 6 high, commonly branching. Leaves variable in 

 texture and pubescence. 



29. S. ulmifolia, Muhl. Stem smooth, or softly pubescent above; 

 leaves ovate-lanceolate, acuminate, serrate, smooth on the upper surface, 

 paler and pubescent on the veins beneath; panicle loose, spreading; heads 

 about 10-flowered ; rays 4-5 ; scales of the involucre acutish ; achenia nearly 

 smooth. Low ground in the upper districts. Sept. Stem 2 - 3 high. 

 Leaves thin, 2' -3' long. 



30. S. Elliottii, Torr. & Gray. Smooth; stem mostly simple ; leaves 

 oblong-lanceolate or elliptical, sessile, acute, finely serrate, the upper often 

 entire ; racemes crowded, forming a pyramidal panicle; scales of the 13-20- 

 flowered involucre linear, obtuse ; rays 5-7; achenia minutely pubescent. 

 (S. elliptica "? Ell.) Damp soil near the coast, Georgia to North Carolina. 

 Sept. Stem 3- 6 high. Leaves very numerous, 2' - 3' long. 



31. S. pilosa, Walt. Stem hirsute, simple, or branching above; leaves 

 very numerous, oblong-lanceolate, slightly serrate, mucronate, rough above, 

 pubescent on the veins beneath ; racemes numerous, slender, forming a pyram- 

 idal or somewhat corymbose panicle; heads narrow, 12- 15-flowered ; rays 

 7-10, small; scales of the involucre linear; achenia slightly pubescent. 

 Low ground, Florida, and northward. Sept. -Oct. Stem 2 -8 high. 

 Leaves 2' - 3' long. 



32. S. odora, Ait. Stem mostly simple, pubescent in lines ; leaves entire, 

 linear-lanceolate, smooth on both surfaces, rough on the margins, punctate 

 with pellucid dots, often reflexed; panicle pyramidal, mostlv onesided ; heads 

 5 - 7-flowered ; rays about 3, showy ; achenia hairy. Dry soil, Florida, and 

 northward. Oct. Stem 2-3 high. Leaves 1'- 2' long. Plant anise- 

 scented. 



33. S. Chapmani, Gray. Stem 2- 3 high, mostly simple ; leaves short 

 (I'-l-J-' long), oblong-ovate, obtuse or mucronate-acutc, the margins scabrous; 

 heads 5 - 9-flowered ; rays 1-3, or none. (S. odorn, in part, 1st edit.) 

 Sandy pine barrens, Florida. Sept. 



34. S. tortifolia, Ell. Stem straight, simple or branched, rough-pubes- 

 cent above ; leaves small, linear, entire, or the lowest slightly serrate, often 

 twisted, pubescent on the margins and midrib; panicle dense, pyramidal; 

 heads small, 6 - 9-flowered ; rays 3 - 4 ; scales of the involucre linear, obtuse ; 

 achenia slightly pubescent. Dry sandy soil, Florida to North Carolina. 

 Sept. Stem 2 - 3 high. Leaves very numerous, 1' - 2' long. 



35. S. gracillima, Torr. & Gray. Smooth ; stem slender ; lowest leaves 

 spatulate-lanceolate, obtuse, serrate near the apex ; the others linear and 



