340 LXXV. COMPOSITE. Helianthus. 



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

 upper ones 1—2' long. Heads lew, middle size. Rays 12—15, light yellow. 

 Jl. — Sept. 



6. H. ciNEREUs. Torr. & Gray. SullivanVs 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 ; 

 fed. naked, slender; scales lanceolate, canescent; ach. villous at summit. 



/?. Sulliva.fitii. Larger and more branched; st. scabrous-hirsute; Ivs. ob- 

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

 Ohio. Sullivant. Stem 2 — 3t' high, virgate, sometimes a little branched, bear- 

 ing a few heads nearly as large as those of H. mollis." Fl. Am. 11. 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, \—\ as wide, 

 Rays 15—25, §—1' by \' wide. JL— Sept. 



8. H. DORONicoiDEs. Lam. Leopard' s-ba7ieSu7iflo^ver. 



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 verv showy. 

 15— 20" by 4— 6". Jl— Sept. 

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



9. H. STRUMosus. Downy Sunflower. 



St. smooth below, scabrous above ; lvs. 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. if. 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-ratjcd 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 leafiness between the present form and the variety following. Aug.f 

 (i. frondosus. Hook. (H. frondosus. Linn.) Oi<terscafe5 larger and leaf-like. 



11. H. TRACHELIIFOLIUS. Willd. 



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

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

 pressed, serrate, acuminate, petiolate, lower ones ovate, middle lance-ovate, up- 

 per lance-linear ; scafes lance-linear, attenuate-acuminate, longer than the disk 

 loosely spreading, ciliate ; cAa/" slightly 3-toothed; rays 12 — 15. — A tall, hand- 

 some species, not uncommon in thickets, &c., Ohio ! and la. ! Stem purplish, 

 3— 6f high. Leaves 3 — 6' by h — 3i' ; petioles h — IJ' long. Heads middle size| 

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



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



St. simple or dichotomous above, scabrous, hirsute ; lvs. 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 3 — 10' by 1 — 3', petio- 

 les i — 1' long. Rays very showy, 15 — 18" by 4 — 6". Jl. — Sept. 

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



