232 COMI'OSIT.E. (C0Mri>SITK FAMILY.) 



3 •*- Lvaves very numi'ruiis,i/ni(litulli/ diminisliiuij in size upward, rein i/, sessile, 

 or lh>' Inirtst mirriiu'iil intu a s/mrl /icliolc: heads small. 

 ti8. S. rugOSa, Mill- Sicm liirsiilc; leaves ovate or oblouf^, aeiile, ser- 

 rate, rmigli iiliove, iiulieseciit, esperiallv on tlio veins beneath, often rnyose, 

 . prominently veined ; jtaniile lealV, often narrow ami elongated ; the raeenies 

 slender and reeurved ; sciiles of the 10- I'j-tlowered involucre linear; rays 

 G-9, small; aehenia pubescent. — Low thickets, Florida, and ncjrthwarJ. 

 Se])t. - Oct. — Stem 2° - 6° high, commonly branching, l-eaves varia!>le in 

 texture and ])ui)escence. 



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

 leaves ovate-lanceolate, acuminate, serrate, smooth on the up])er surface, 

 paler and pubescent ou the veins beueath ; 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'-. '{'long. 



30. S. Elliottii, Torr. & (iray. Smooth; .'^tem mo.stly simple; leaves 

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

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

 flowered iuvolucre linear, obtu.se ; rays 5-7; achenia mumtely ])uliescent. 

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

 Sept. — Stem 3° - (r high. Leaves very numerous, 2' - 3' hjug. 



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

 very nunicrnns, oldong-lanceolate, slightly serrate, mucronate, rough above, 

 puliescent on tiie veins beneath ; racemes numerous, slender, forming a pyram- 

 idal or somewhat corymbose panicle; heads narrow, 1 2 - 1 5-flowered ; rays 

 7-10, small; scales of the iuvolucre linear; achenia slightly pubesceut. — 

 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 ou the margins, punctate 

 with pellucid dots, often reflexcd; panicle pyramidal, mostly one-sided ; heads 

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

 northward. Oct. — Stem 2° -3° high. Leaves l'-2' long. — Plant anise- 

 scented. 



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

 (\'-\V long), oliluDg-ovate, obtuse ormucronate-acute, the margins scabrous; 

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

 Sandy pine barrens, Florida. Sept. 



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

 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 sliirhtly pubescent. — Dry sandy soil, Florida to North Carolina. 

 Sept. — Stem 2^ - 3° high. Leaves very numerous, I' - 2' long. 



3,5. S. gracillima, Torr. iSt Gray. Smooth ; stem slender ; lowest leaves 

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



