COMPOSITE. (composite FAMILY.) 227 



margined. Pappus composed of several short chaffy scales ; that of the disk 

 flowers mostly with 2-4 longer awns. — Tereuuial herbs, resembling Asters. 



1. B. diffusa, Kll. Stem with long and slender branches ; leaves linear, 

 entire; heads small, terminal; achenia narrowly margined, hairy; pappus 

 very short, two-awued. — Damp soil. Sept. - Oct. — Stem 3*^ - 4° high. Kays 

 purplisli. 



2. B. glastifolia, L'Her. Stem paniculate; leaves rigid, lanceolate, 

 sparingly serrate ; the upper ones linear, entire ; heads rather large ; achenia 

 broadly margined ; pappus of few sliort bristles, and 2-4 long awns. — River 

 swamps, ilorida, and northward. July -Sept. — Stem 3^-5'^ liigb- Rays 

 white. 



3. B. asteroid.es, L'Her. Stem paniculate, the branches short ; leaves 

 lanceolate, entire; achenia smooth, narrow-margined; pappus very short, 

 without awns. — Swamps, North Carolina. — Stem 2° -3° high. Heads inter- 

 mediate in size between the two preceding. 



19. BELLIS, Tourn. Daisy. 



Heads many-flowered. Rays pistillate, in a single row. Scales of the in- 

 volucre mostly in two rows, rather thin, equal. Receptacle conical, naked. 

 Achenia obovate, compressed, wingless. Pappus none. — Low herbs, with 

 alternate leaves, and solitary terminal heads of white or purple flowers. 



1. B. integrifolia, Michx. Annual, branching, smooth (6'- 12' high); 

 leaves obovate, entire, the upper ones lanceolate, sessile; heads peduncled; 

 rays pale purple ; aclienia rough. — Tennessee [Gattinger). March. 



20. SOLIDAGO, L. Golden-rod. 



Heads few- or many-flowered. Rays 1-16, rarely wanting, pistillate. Disk 

 flowers tubular, perfect. Scales of the involucre imbricated, rarely with 

 spreading tips. Receptacle flat, mostly alveolate. Achenia terete, many- 

 ribbed. Pappus simple, of numerous scabrous mostly capillary bristles. — 

 Perennial (rarely shrubbj') erect plants, with alternate leaves, and small heads 

 of yellow flowers. 



§ 1. Chrts.xstrtjm. — Scales of the involucre n-ith herhnceous spreading tips: 

 bristles of the pappus unequal, some of them thickened upward: racemes short, 

 forming n long and narroio leaftj panicle. 



1. S. discoidea, Torr. & Gray. Pubescent or hairy; stem simple or 

 branched ; leaves ovate, acute, abruptly narrowed into a petiole, the lower ones 

 coar.sely serrate; racemes composed of .3-6 large 10-15-flowered heads; 

 rays none; achenia smooth. (Aster? discoideus, Ell.) — Rich woods, Flor- 

 ida, Georgia, and westward. Sept. — Flowers yellowish white. Stem 3° -5° 

 high. 



2. S. squarrosa, Muhl. Stem stout, simple, pubescent above; leaves 

 large, smoothish, oblong, acute, serrate, the lower ones tapering into a long 

 winged petiole ; the upper sessile and entire ; racemes shorter than the leaves, 

 composed of .3-6 clu.'itered heads; rays 12-16, showy; achenia smooth. — 

 Mountains of Georgia, and northward. Sept. — Stem 2° -4° high. Lowest 

 leaves 6' - 8' long. Heads 1 6 - 24-flowered. 



