340 LXXV. COMPOSITE. HELIANTHUS. 



Western States ! Stem 3 5f high, scape-like, slender. Leaves 35' by 1 2', 

 upper ones 1 2' long. Heads lew, middle size. Rays 1215, light yellow. 

 Jl. Sept. 



6. H. CINEREUS. Torr. & Gray. Sullivant's Sunflower. 



" Rough with a cinerous pubescence ; Ivs. ovate-oblong, rather acute, ap- 

 pressed to the stem, serrulate, sessile, the lower narrowed to a winged petiole ; 

 ped. naked, slender ; scales lanceolate, canescent ; acfi. villous at summit. 



0. Sullivantii. Larger and more branched; st. scabrous-hirsute; Ivs. ob- 

 scurely serrate, acute, the uppermost entire, often alternate. Near Columbus, 

 Ohio. Sullivant. Stem 2 31' high, virgate, sometimes a little branched, bear- 

 ing a few heads nearly as large as those of H. mollis." Fl. Am. II. p. 324. 



7. H. MOLLIS. Lam. (H. canescens. Michx.) Soft-leaved Sunflower. 

 St. villous; Ivs. ovate, acuminate, sessile, cordate and clasping, entire or 



subserrate, tomentose-canescent, opposite, upper ones sometimes alternate ; 

 scales of involucre lanceolate, villose-canescent ; chaff entire, acute and canes- 

 cent above. Prairies and barrens, Ohio ! la. ! Mo., common. A hoary and 

 villose species, 2 4f high, nearly simple. Leaves 3 5' long, f as wide. 

 Rays 1525, J 1' by \' wide. JL Sept. 



8. H. DORONicolDEs. Lam. Leopard's-bane Sunflower. 



St. branched, rough or hirsute above ; Ivs. opposite, petiolate, or the upper 

 alternate and subsessile, ovate and ovate-lanceolate, acuminate, tripli-veined, 

 serrate, scabrous above, smooth or pubescent beneath ; scales lance-linear, cili- 

 ate, a little longer than the disk; rays 12 15. A large species, common in 

 the Western ! and Southern States. Stem 4 7f high, with irregular, alternate 

 branches. Leaves 3 10' by 1 3'; petioles i 1' long. Rays very showy, 

 1520" by 46". JL Sept. 

 /?. pubescens. (H. pubescens. Hook.) Lvs. tomentose beneath, subsessile. 



9. H. STRUMOSUS. Downy Sunflower. 



St. smooth below, scabrous above ; Ivs. ovate-lanceolate, acute, serrate, 

 scabrous above, smooth or tomentose-canescent beneath; hds. few, about 10- 

 rayed ; scales ciliate, equaling the disk, squarrose-spreading at tip. 7}. Grows 

 in swamps, &c., Can. and U. S. Stem 3 5f high, erect, branching above. 

 Leaves petiolate, with an acute point and close serratures, the lower surface va- 

 rying in the degree of pubescence. Rays bright yellow, an inch or more in 

 length. Scales hairy. Jl. 



10. H. DECAPETALUS, Ten-rayed Sunflower. 



Lvs. opposite, ovate, acuminate, remotely serrate, 3-veined, scabrous 

 above, smooth or nearly so beneath ; invol. scales lanceolate-linear, subciliate, 

 spreading, nearly equal ; rays 10 12, pale yellow. Copses, along streams, 

 Can. to Car. and Ky. Stem 3 4f high, purplish. Involucre varying in all 

 degrees of leanness between the present form and the variety following. Aug.-f- 

 p.frondosus. Hook. (H. frondosus. Linn.} Outer scales larger and leaf-like. 



11. H. TRACHELIIFOLIUS. Willd. 



St. strict, branching, scabrous or with scattered hairs ; Ivs. opposite, those 

 of the branches mostly alternate, thin, scabrous both sides, tripli-veined, ap- 



3 6f high. Leaves 3 6' by 3' ; petioles \ !' long. Heads middle size, 

 at top of the slender, suberect branches. Rays expanding 2 3'. 



12. H. HIRSUTUS. Raf. (H. diversifolius. Ell.) 



St. simple or dichotomous above, scabrous, hirsute ; Ivs. opposite, petio- 

 late, subserrate, 3-veined, ovate-lanceolate, obtuse at base, acuminate, very sca- 

 brous above, hirsute beneath; scales ovate-lanceolate, acuminate, hirsute, as 

 long as the disk ; rays 11 15. Dry soils, Western and Southern States. Stem 

 4 7f high, with irregular, alternate branches. Leaves 310' by 13', petio- 

 les !_i' long. Rays very showy, 15 18" by 46". Jl. Sept. 

 /?. pubescens. (H. pubescens. Hook.) Lvs. tomentose beneath, subsessile. 



