230 coMPOsiTiE. (composite family.) 



7. H. rigidus, D '>f. Stom Icafv, stout, mostly simple, roufih ; leaves 

 oblong-hmccohite, sli;:litly sen-ate or entire, thick and rii;id, very roufili on l>oth 

 sides, narrowed into short connate petioles ; scales of the involucre ovate, acute, 

 appressed ; ehaff of the receptacle obtuse ; rays 20-25. (II. scaherrimus, Ell.) 

 — Western districts of Georgia, A7/(0», and westward. Sept. — Stem I°-3° 

 high. Heads showy. 



* * * Pn-fn/tial: dish ypP.ow : heads laiye or mlddle-slziJ. 



8. H. Isetiflorus, Pers. Stem stout, rough, branching ; leaves oval-lance- 

 olate, acuminate, serrate, rigid, A-eiy rough on both sides, on short jietioles ; tho 

 uppenuost often alternate ; heads solitary or corymbose, on naked j)oduncIes ; 

 scales of the involucre ovate-lanceolate, acute, ciliatc, appressed ; cliafl' of tisc 

 receptacle somewhat 3-toothed or entire ; rays 12-16, elongated. (II tricusp;-;. 

 Ell., with the leaves all nearly entire ; chaff of the receptacle 3-toothed.) — Dry 

 soil, in the Western districts of Georgia, and westward. Sept. — Stem 3° -4° 

 high. Leaves 5' - 8' long. Rays H' long. 



9. H. OCCidentalis, liiddell, var. Dowellianus, Torr. & Gray. Nearly 

 smooth; stem branched above; leaves tri[)le-ncrved, rather thick, slightly den- 

 tate, on margined petioles, and with a short scattered pubescence ; the lowest 

 ones opposite, large, broadly ovate, subcordate, obtuse ; the u])per alternate, olv 

 long-ovate ; peduncles long and slender; scales of the involucre lanceolate, acu- 

 minate, slightly ciliate, shorter than the disk, appressed ; rays 1 2 - 1 .5. — Ma<'on 

 County, North Carolina, Curtis. Aug. and Sept. — Stem 4° -5° high. Lower 

 leaves 7' - 8' long, 5' - 6' wide. Kays 1' long. 



10. H. mollis, Lam. Villous or tomcntose and somewhat hoary ; stem 

 mostly simple ; leaves ovate or oblong-ovatc, acute, slightly serrate, cordate and 

 clasping; the upper ones often alternate ; heads few, on short peduncles; scales 

 of the involucre lanceolate, acute; chaff of the receptacle entire; rays 15-25. 

 (H. pubesccns, Ell.) — Dry open woods in the upper districts of Georgia, and 

 westward. Sept. — Stem 2° -3° high. Leaves 2' -3' long. Heads thick. 



11. H. giganteus, L. Stem hirsute, rough, branching above; leaves 

 lanceolate, acuniinatc, serrate, nearly sessile, rough above, ])alcr and rough-huiry 

 beneath, slightly 3-nerved at the base, all but the lowest ones alternate ; scales of 

 the involucre linear-lanceolate, spreading, hirsute; rays 15-20. — I.,ow ground 

 in the upper districts, and northward. Sept. — Stem 3°- 10° high. Leaves 2' -5' 

 long, llays 1' long. 



12. H. tomentOSUS, IMichx. Stem stout, hirsute, branching ; leaves all 

 alternate, or the lowest ones opposite, very rough above, tomcntose beneath, 

 slightly serrate; the lowest large (C- 12'), ovate, on short winged petioles; tho 

 njUHT ones oblong ; heads large; scales of the involucre numerous, lanceolate, 

 acuminate, villous, spreading; rays 15-20. (II. s])athulatus, /.V/., with tho 

 leaves all opposite, scales of the involucre shorter.) — Open woods, and mar- 

 gins of fields, Florida to North Carolina. Sept. — Stem 4° -8° high. Kays 

 I'-lJ'long. 



13. H. doronicoidcs, Lam. Stem tall, branched, smooth below, hirsute 

 above ; leaves opposite, ovate or ovate-lanceolate, acuniinatc, serrate, rough 



