252 COMPOSITE. (COMPOSITE FAMILY.) 



5. H. heterophyllus, Nutt. Hirsute or hispid ; stem slender, niost"/ 

 si tuple, naked abuve; leaves opposite, thick, entire; the luvver lanceolate or 

 oblong ; the others linear, remote ; scales of the involucre lanceolate, acumi- 

 nate, ciliate ; chaff of the receptacle 3-toothed, the middle tootli cuspidate ; 

 rays 15-20, elongated. Pine barren swamps, Florida to North Carolina, 

 and westward. Sept. - (Jet. Stem 2 - 4 high. Lowest leaves 2' - 6' long. 

 Hays 1 long. 



6. H. atrorubens, L. Hirsute or hispid ; stem sparingly branched and 



somewhat naked above; leaves opposite, oval, serrate, the lowest large and 

 long-petioled ; the upper small, sessile, distant ; scales of the involucre oval 

 or oblong, obtuse; chaff of the receptacle 'acute ; rays about 12 ; achenia 

 pubescent at the apex. Dry soil, Florida to North Carolina. Sept. -Oct. 

 Stem 2 - 5 high. Lowest leaves 4' - 6' long. Heads rather small. 



7. H. rigidus, Desf. Stem leafy, stout, mostly simple, rough ; leaves 

 oblong-lanceolate, slightly serrate or entire, thick and rigid, very rough on 

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

 acute, appressed ; chaff of the receptacle obtuse; rays 20-25. (H. scaber- 

 rimus, Ell.) Western districts of Georgia (Elliott), and westward. Sept. 

 Stem l-3 high. Heads showy. 



* * * Perennial: disk yellow : heads large or middle- sized. 



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

 lanceolate, acuminate, serrate, rigid, very rough on both sides, on short peti- 

 oles ; heads solitary or corymbose ; scales of the involucre ovate-lanceolate, 

 acute, ciliate, appressed ; chaff of the receptacle somewhat 3-toothed or en- 

 tire ; rays 12-16, elongated. (H. tricuspis, 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. 

 Kays 1 % long. 



9. H. OCCidentalis, Riddell, var Dowellianus, Torr. & Gray. 

 Nearly smooth ; stem branched above; leaves pubescent, triple-nerved; the 

 lowest opposite, broadly ovate, obtuse ; the upper alternate, oblong-ovate; 

 peduncles long and slender; scales of the involucre lanceolate, acuminate, 

 slightly ciliate, shorter than the disk, appressed ; rays 12-15. Mountain's 

 of North Carolina. August - Sept. Stem 4 - 5 high. Lower leaves 7' - 8' 

 long, 5' -6' wide. Rays 1' long. 



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

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

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

 scales of the involucre lanceolate, acute; chaff of the receptacle entire ; rays 

 15-25. 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, acuminate, serrate, nearly sessile, rough above, naler and rough- 

 hairy beneath, slightlv 3 nerved at the base, all but the n.,vest alternate; 

 scales of the involucre linear-lanceolate, spreading, hirsute; rays 15-20. 

 Low ground in the upper districts. Sept, {Stem 30 _ JQO high. L eaves 2'- 

 5' long. Rays 1' long. 



