36J: ORDER LXYIir. COMPOSIT.E. 



11. A. ericoi'des, (Willd.) Stem erect, slender, with numerous ex- 

 panding branches. Leaves of the stem Hnear, glabrou?, acute at each 

 end, those of the branches subulate, numerous, very small. Flowem in 

 racemes, on short peduncles ; involucre with lanceolate scales ; ray flo- 

 rets numerous, linear. — Purple. If. Oct, — Nov. Barren soils. Com- 

 mon. 2 — 3 feet. 



12. A. RACEMo'sus, (Ell.) Stem diffuse, with slender, slightly pubes- 

 cent branches. Leaves linear-lanceolate, with the margins scabrous, 

 pubescent beneath, those of the branches verj small. Flowers in sim- 

 ple racemes at the summit of the branches ; involucre with linear- 

 lanceolate scales ; ray florets numerous, linear. — Purple. If. Sept. — 

 Oct. On the coast, 1—2 feet. 



13. A. multiflo'rus, (L.) Stem diffusely branched, almost hispid. 

 Leaves linear, acute, pubescent, and fringed along the margin. Flow- 

 ers in terminal racemes, somewhat secund ; involucre with ciliate, obo- 

 vate scales, squarrose. — Almost white. If. Aug. — Sept. In open 

 fields. Common. 2 — 3 feet, 



14. A. adna'tus, (Nutt.) Stems minutely hispid, branches virgate. 

 Leaves small, appressed, joined to the stem, except the tips. — Pale pur- 

 ple. Mid. Car. and Geo. Oct, — Nov. 18 — 24 inclies. 



15. A. SQUARKo'sus, (Walt.) Stem procumbent, branching, hispid, 

 hairy. Leaves small, numerous, ovate, reflexed, hispid along the mar- 

 gin, scabrous. Floivers terminal, in a loose panicle ; involucre with 

 lanceolate hairy scales ; ray florets numerous, 3-toothed, rather large, 

 — Blue, If, Sept. — Oct. Dry soils. Common. 2 — 3 feet. 



IG. A. conco'lor, (L.) Stem erect, pubescent, sparingly branched 

 toward the summit. Leaves pubescent, almost tomentose, oblong-lance- 

 olate. Flowers in terminal racemes ; involucre with lanceolate, silky 

 scales; ray florets linear-lanceolate. — Blue. If. Sept. — Oct. Dry 

 soils. Common. 2 — 3 feet. 



17. A. reticula'tus, (Pursh.) Stem erect, tomentose, branching to- 

 Avard the summit. Leaves sessile, oblong-lanceolate, acute, margins 

 revolute, tomentose, 3-uerved, Flowers in racemes; involucre with 

 acute scales. — White. %. Aug. — Oct. Car, and Geo. 2 — 3 feet. 



18. A. Nov^ An'glle, (L.) Stem erect, with diffuse, spreading 

 branches, hairj'. Leaves narrow, lanceolate, amplexicaul, auriculate 

 at the base, hairy, and scabrous along the margin. Flowers in termi- 

 nal panicles ; involucre with lanceolate scales, somewhat hispid ; ray 

 florets numerous, narrow. — Purple. 1i. Sept. — Oct. Western Geo. 

 4—10 feet. 



19. A. Cya'nfxs, (Ell.) Stein glabrous, young branches slightly 

 pubescent, expanding. Leaves linear-lanceolate, somewhat scabrous, 

 slightly amplexicaul. Flowers in paniculate racemes ; involucre with 

 appressed linear-lanceolate scales; ray florets numerous, narrow. Seed 

 pubescent.— Purple. U- Sept,— Oct, Middle Car. and Geo, 3—4 

 feet, A. concinus, Willd. 



20. A. virga'tus, (Ell.) Ste7u erect, glabrous, with long erect virgate 

 branches, slightly pubescent at the summit. Leaves linear-lanceolate, 

 amplexicaul, long, glabrous, margins slightly scabrous. Flowers in 

 terminal racemes; involucre with the scale slightly squarrose, slightly 

 mucronate ; ray florets small. >Segc?s scarcely pubescent. — Purple. If. 

 Sept.— Oct. Middle Geo. 3—4 feet. 



