COMPOSITE. (COMPOSITE FAMILY.) 231 



above, pubescent beneath ; the lower ones often slightly cordate, on short winged 

 petioles ; scales of the involucre linear-lanceolate, hirsute, about as long as the 

 disk; rays 12-15. Southern States, Torr.Sf Gray, and westward. Sept. 

 Stem 5 - 8 high. Lowest leaves 6' - 12' long. Heads large. Rays \\' long. 



14. H. strumoSUS, L. Stem simple or branched, rough above, smooth 

 below ; leaves varying from lanceolate to ovate-lanceolate, acuminate, slightly 

 serrate, short-petioled, very rough above, paler and smooth, or roughish, or 

 sometimes softly pubescent beneath ; scales of the involucre lanceolate, acumi- 

 nate, as long as the disk, spreading; rays 8- 10. (H. mollis, Ell) Dry soil, 

 common. Sept. Stem 2 - 4 high, sometimes glaucous. Leaves 3' - 4' long. 



15. H. decapetalus, L. Stem branched, smooth below, rough above ; 

 leaves thin, opposite, ovate, acuminate, coarsely serrate, rough on the upper sur- 

 face, smooth or roughish beneath, abruptly short-petioled ; scales of the involucre 

 lanceolate-linear, spreading ; the exterior ones longer than the disk ; rays 8 - 10. 

 (H. strumosus and H. tenuifolius, Ell) Mountains of Georgia, and northward. 

 Sept. Stem 2 - 5 high. Leaves 3' - 6' long, obtuse at the base. 



16. H. hirsutus, Raf. Stem hirsute, simple or forking at the summit ; 

 leaves opposite, short-petioled, tapering from the broad and rounded, sometimes 

 slightly cordate base, acuminate, sen-ate, very rough above, paler and rough- 

 hairy beneath ; scales of the involucre ovate-lanceolate, acuminate, appressed, 

 as long as the disk; rays about 12. (H. diversifolius, Ell, with the leaves 

 broader; the upper oval, and nearly entire.) Dry soil in the upper districts. 

 Sept. Stem 2 - 5* high. Leaves 3' - 5' long. 



17. H. divaricatus, L. Stem smooth, simple, or corymbosely branched 

 at the summit ; leaves opposite, sessile, ovate-lanceolate, serrate, rounded or 

 truncate at the base, very rough above, smooth or rough-pubescent beneath ; 

 heads few, on short peduncles ; scales of the involucre lanceolate or linear-lance- 

 olate, spreading, as long as the disk; rays 8-12. (H. truncatus, Ell.) Dry- 

 woods, Florida, and northward. Sept. Stem 2 - 3 high. Leaves 3' - 5' long. 



* * * * Perennial : disk yellow : heads small : leaves narrow. 



18. H. mi.croceph.alus, Torr. & Gray. Stem smooth, much branched ; 

 leaves opposite, or the upper ones alternate, lanceolate or ovate-lanceolate, acute, 

 sparingly serrate, rough above, paler and tomentose beneath, on short petioles ; 

 heads numerous, on pubescent peduncles ; scales of the involucre ovate-lanceo- 

 late, appressed ; rays 5-8. ( H. divaricatus, Ell) Dry woods, Florida, and 

 northward. Sept. Stem 3 - 5 high ; the branches forking. Leaves 3' - 10* 

 long. 



19. H. Schweinitzii, Torr. & Gray. Stem hispid, branching above ; 

 leaves lanceolate, acuminate, sparingly serrate, nearly sessile, very rough above, 

 hoary-tomentose beneath ; the lower ones opposite, the upper alternate and en- 

 tire ; scales of the involucre lanceolate, acute, with spreading tips ; rays about 8. 

 Upper districts of North Carolina, Curtis. Stem 3 - 5 high. Leaves 3'- 

 5' long. 



20. H. Isevigatus, Torr. & Gray. Stem smooth and glaucous, the branches 

 forking ; leaves smooth on both sides, opposite, or the uppermost alternate, ob- 



