ORDER LXVIII. 0OMPOSITJ2. 363 



Flowers terminal, on scattered branches ; involucre with numerous lin- 

 ear-lanceolate scales, tinged with purple ; ray florets 3-toothed, gener- 

 ally 20. Seed angled, oblong. — i'ale purple, y. Sept. — Oct. On 

 the seacoast. 2 — o feet. 



2. A. Ch.\p.\ian''ii, (T. & G.) Stem glabrous, simple, or branched at 

 the base, slender, corymbose at the summit, branches terminated by 

 single heads. Leaves numerous, linear, subulate, appressed. Rays 

 elongated, 20 or more ; achenia oblong, compressed, glabrous. — Flor. 



3. A. PALUDo'sus, (L.) Stem pubescent near the summit. Leaves 

 sessile, subulate, acute, glabrous beneath, scabrous on the upper surface 

 and margins, sometimes ciliate. Flowers solitary, large, on naked pe- 

 duncles; involucre squarrose, the lower scales leaf-like, reflexed ; ray- 

 florets long, numerous. /Se^c?s glabrous, angled. — Purple. If. Oct. — 

 Nov. Pine-barrens. Common. 



4. A. grandiflo'rus, (L.) Stem pubescent toward the summit. 

 Leaves scabrous, linear, sessile, rigid, reflexed, with the margin ciliate. 

 Flowers solitary at the extremities of the branches ; scales of the invo- 

 lucre linear-lanceolate, reflexed ; ray florets numerous, large. Seeds 

 scarcely pubescent. — Purple. Oct. — Nov. Sandy woods. 2 — 3 feet. 



5. A. exi'lis, (Ell.) Stem erect, slender, with corymbose branches. 

 Leaves long, linear, slightly scabrous, diminishing in size toward the 

 summit. Flowers on the upper branches in racemes ; involucre with 

 glabrous, linear-lanceolate scales ; ray florets numerous, narrow. — Pur- 

 ple. 71. Sept. — Oct. Damp soils, 4 — 5 feet. 



6. A. subula'tus, (Mich.) Stem erect, glabrous, much branched. 

 Leaves long, linear, subulate, appressed. Flowers numerous, on termi- 

 nal peduncles ; involucre cylindrical, with the summit of the scales 

 slightly reflexed; ray florets numerous, 3-cleft, short. — Purple. 2^, 

 Sept. — Oct. Seacoast. 2 — 3 feet. A. linifoHus, L. 



1. A. FOLioLo'sus, (Ait.) Stem erect, branching, glabrous. Leaves 

 sessile, linear-lanceolate, appressed, with scabrous margins, those of the 

 branches minute and numerous. Flowers in compound panicles ; invo- 

 lucre with acute appressed scales, hairy, or ciliate at the summit. ; r.iy 

 florets numerous, linear-lanceolate. -See J glabrous. — Purple. U- Sept. 

 — Oct. In dry soils. Common. 2 — 3 feet. In part, A. durno^us, L. 



8. A. sPARSiFLo'ra's, (Ait.) Sfe7n slender, erect, with expanding 

 branches, glabrous. Leaves linear, reflexed, entire. Flowers solitary, 

 at the extremity of the branches ; involucre with acute, appressed s(jales. 

 — Purple. U' Aug. — Sept. Low country. 2 — 3 feet. 



9. A. tenuifo'lius, (L.) Stetti erect, glabrous near the base, branch- 

 ing. Ljcnves numerous, linear-lanceolate, tapering at each end, slightly 

 scabrous along the margins, upper ones minute. Flowers in racemes, on 

 short peduncles ; involucre with appressed linear acute scales; ray flo- 

 rets numerous, narrow. Seed oblong. — Purple. 1(. Oct. — Nov. 

 Mid. upper dist. Car. and Geo. 



10. A. DuMo'sus, (L.) Stem erect, glabrous, much less branched than 

 the preceding species. Leaves linear-lanceolate, entire, with the mar- 

 giub slightly scabrous. Flowers solitary, terminal at the summit of 

 the paniculate branches ; involucre with acute glabroun, linear-lanceo- 

 late scales ; ray florets numerous, narrow. Seeds scarcely pubescent 

 — Purple. U. Sept. — Oct. In damp, rich soils. 1 — 2 feet. 



