ORDER LXVIII. COMPOSITE. 363 



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

 ear-lanceolate scales, tinged with purple ; ray florets 3-l.oolhed, gener- 

 ally 20. Seed angled, oblong. — Pale purple. %. Sept. — Oct. On 

 the seacoast. 2 — 3 feet. 



2. A. Ciiapman'ii, (T. & G.) Stejn 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. taludo'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. Seeds 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. 2f. 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. If. 

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



7. 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 ; ray 

 florets numerous, linear-lanceolate. Seed glabrous. — Purple. If. Sept. 

 — Oct. In dry soils. Common. 2 — 3 feet. In part, A. dumosus, L. 



8. A. spahsiflo'rus, (Ait.) Stem slender, erect, with expanding 

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

 at the extremity of the branches ; involucre with acute, appressed scales. 

 — Purple. If. Aug. — Sept. Low country. 2 — 3 feet. 



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

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

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

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

 rets numerous, narrow. Seed oblong. — Purple. If. 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- 

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

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

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

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



