340 LXXV. COMPOSITE. Helianthus. 



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

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

 Jl.— Sept. 



6. H. ciNEREus. Torr. & Gray. SnlUvanVs Snnjiovxr. 



" 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. 



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

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

 Ohio, Sullivant. Stem 2 — 3f 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 Sunjioiver. 



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

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

 scales of involucre lanceolate, villose-cancscent ; 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, l — | as wide. 

 Rays 15—25, ^—1' by i' 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, 

 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. — q\. 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, Tcn-raijed Sunflower. 



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

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

 .•spreading, nearlv 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.) Ojf/<?r scaZes larger and leaf-liSe. 



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- 

 prcssed, serrate, acuniinate, petiolate, lower ones ovate, middle lance-ovate, up- 

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

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

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

 3— 6f high. Leaves 3 — 6' by i— 3§' ; petioles I — U' long. Heads middle size, 

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



12. H. HinsuTcs. Raf (H. diversifolius. EU.) 



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

 late, subserrate, 3-vcined, ovate-lanceolate, obtuse at base, acuminate, verj' sca- 

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

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

 4— 7f high, with irregular, alternate branches. Leaves .3—10' by 1 — 3', petio- 

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

 ft. pnbescens. (H. pubescens. 'Unok.) Lvs. tomentose beneath, subsessile. 



