COMPOSITE. (composite FAMILY.) 231 



rather small, about lO-tlowered ; rays 5, uarrow; scales of the involucre liuear, 

 obtuse. — Coast of Florida to North Carolina. Oct. — Stem 2° - 4° high. 



22. S. sempervirens, L- Stem simple, or branched above ; lowest leaves 

 lanceolate-oblong, entire, fleshy, loug-petioled ; the upper lanceolate, acute, 

 sessile or partly clasping ; panicle contracted or pyramidal ; heads rather 

 large ; rays 7-10; scales of the involucre liuear, acutish. — Salt marshes, 

 Florida, and nojjthward. Sept. - Oct. — Stem 3'^ - 8° higli. Leaves varying 

 in thickness, the lowest 6' - 12' long. 



2 -t- Stems (smooth) commonly hranchtng : leaves not fleshy, serrate, veiny ; the 

 lowest ample, tapering into a margined petiole : panicles pyramidal, or race- 

 mose on the spreadincj branches. 



23. S. patula, Muhl. Stem stout, strougly angled ; leaves large, ovate 

 or oblong, acute, very rough above, smooth beneath ; panicles dense, leafy ; 

 peduncles pubescent; rays 6-7; achenia sparsely pubescent. — SwamiJ.s, 

 Georgia, and northward. — Leaves 6' - 1 2' long. 



Var. strictula, Torr. & Gray. Stem simple, or with few elongated rough- 

 pubescent branches ; leaves smaller ; racemes short, formiug a long and 

 slender compound raceme. — Swamps, Florida, and northward. Sept. -Oct. 

 — Stem 4° -6° high. 



24. S. junCGa, Ait. Smooth; leaves sharply serrate, acute or acuminate 

 at each end, the lowest elliptical or lanceolate-oblong, somewhat 3-ribbed, on 

 winged and ciliate petioles ; the upper sessile ; pauicle dense, somewhat corym- 

 bose ; heads small, crowded, 1 8 - 20-flowered ; rays 8-12, small ; scales of the 

 involucre obtuse ; achenia nearly smooth. — Rich soil in the upper districts. 

 Sept. — Stem 2° - 4° high. 



25. S. arguta, Ait., var. Caroliniana, Gray. Inflorescence pubescent, 

 otherwise glal irons ; stem 2° -4° high, branching above ; lowest leaves large 

 (4' -6' long), ovate, sharply serrate, wiug-petioled, upper ones lanceolate, 

 entire ; heads 3" long, Crowded in short terminal recurved racemes, about 

 20-flowered ; achenia pubescent. — Mountains of Georgia and North Carolina. 

 August. 



2G. S. Boottii, Hook. Stem smooth, or pubescent above ; leaves lanceo- 

 late or olilong, acute or acuminate at each end, appressed-serrate, smooth or 

 more or le.ss pubescent ; panicle open, oblong or pyramidal ; heads about 12- 

 flowered ; rays 5 ; scales of the involucre obtuse ; achenia nearly smooth. — 

 Varies, with longer, narrower, and more sharply serrate leaves, and slender 

 racemose panicles towards the summits of the spreading branches. — Sandy 

 soil, Florida to North Carolina. Sept. — Stem 2° -3° high, often ])urj!lish. 



27. S. braehyphylla, Clmpm. Stem slender, pubescent, sparingly 

 branclicd : leaves smooth or pubescent on the veins, finely serrate, the lowest 

 spatulate, the upper oval or orbicular; racemes short, forming a compound 

 raceme toward the end of the .spreading branches ; scales of the 3 -5-flowered 

 involucre rigid, obtuse ; r.ays none ; achenia pnliescent, as long as the rigid 

 pappus. — Dry light .soil, Georgia, Fl< rida, nnl westward. Sept. — Stem 2°- 

 3° high. Leaves l'-2' long. 



