I'L'l* COMPOSIT.K. (composite FAMILY.) 



26. A. multiflorus, Ait. Wliitish-puliescent ; etein very leafy, ami 

 niiKli bruiulit-d ; lia\e.s linear, ol)tu.>;e at eaeli end, often l)ri.xlle-j)ointeil, 

 spreading or recurved, the upper oues 8es.sile or soniewliat clasping ; heads 

 densely racemose on the short and very leafy branches, or sometimes solitary 

 at tlieir summits ; scales of the involucre broadest at tiie apex, obtuse or 

 short-pointed. — Dry sterile soil, in tiic ujijicr districts. — Stem l°-2'^high. 

 Leaves about 1' long. Kays wliitc. 



« 6. Leaves linear, lanceolate, or oblontj, sessile, usualli/ narrowed at the base : 

 fieails small or middle-sized : scales of the inrohtcre memhrauaccous, with up- 

 pressed or slightly spreading tij)S : i-ai/s pale purjile or white. 

 ■♦- Heads sinall. 



27. A. racemOSUS, Kll. Kough-jmbescent ; stem iiiiuh liraiu bed, bear- 

 ing the small heads in a spiked raceme near the summit of the slender erect 

 branches ; leaves linear, sessile, rigid ; scales of involucre smooth, linear-subu- 

 late ; the inner ones as long as the disk ; rays very short. — Damp ricli soil, 

 Paris Island, Soutli Carolina — Stem 2° high. Rays pale purple. 



28. A. duraosus, L. Smoothish ; stem slender, racemose-panided, bear- 

 ing the small heads ciiietly on slender and very leafy branchlets ; leaves linear, 

 entire, spreading or reflexed ; the lowest spatulate-lanceolate, serrate ; those 

 of the branches short, linear-oblong, and mostly obtuse scales of the in- 

 volucre closely imbricated in 3-6 rows, with obtuse green tips. — Dry or damp 

 soil, common, and running into several varieties. — Stem 2°-3° high. Kays 

 pale purple or white. 



29. A. vimineus, Lam. Stem slender, pubescent, racemose-branched ; 

 leaves long, linear-lanceolate, sparingly serrate, tapering into a long and slen- 

 der point ; the uppermost entire ; heads in close racemes along the spreading 

 branches; scales of the involucre narrow-linear, acute, imbricated in 3-4 

 rows. — Low ground in the upper districts. — Stem 2° -3° high. Kays pale 

 purple or wliite. 



30. A. diffusus, Ait. Pubescent or hairy ; stem simple, and Ijearing the 

 small heads in a long and leafy compound raceme, or diffusely branched, with 

 the heads scattered along the branches, or in short few-flowered racemes; 

 leaves varying from linear-lanceolate to wedge-obovate, acute at each end, 

 sharply serrate in the middle ; the lowest spatulate, the uppermo.st entire ; 

 scales of the involucre linear, acute. — Low grounds and banks, common and 

 very variable. — Stem 1° - 4° long. Kays wliite or purplish. 



Var. bifrons, Gray. Smooth throughout; stem simple, slender, 2° -3° 

 high; leaves thin, lanceolate, remotely serrate, 4' - 6' long ; heads in small 

 axillary and terminal panicles. — Shaded river banks, Georgia and Tennessee. 

 I- -4- Heads middle-sized. 



31. A. paniculatus, Lam. Stem smooth or pubescent in lines, corym- 

 bose or racemose-branched : heads in short racemes ; leaves lanceolate, acute 

 or acuminate at both ends, smooth, rough on the margins, the lower ones 

 sharplv serrate ; scales of the involucre linear-subulate, loosely imbricated. — 

 Low ground, Florida, and northward. — Stem 3° -6° high, sparingly or 

 diffusely branched. Leaves 2' -4' long. Kays pale blue. 



