4 8 4 



COMPOSITAE. 



VOL. III. 



18. Helianthus mollis Lam. Hairy Sun- 

 flower. Fig, 4478. 



Helianthus mollis Lain. Encycl. 3: 85. 1789. 



Perennial ; stem stout, simple or sparingly' branched 

 above, densely hirsute, 2-4 high. Leaves 'ovate or 

 ovate-lanceolate,, closely sessile and somewhat clasp- 

 ing by a broad cordate base, pinnately veined, 3- 

 nerved above the base, all opposite, or the upper 

 alternate, ascending, acute or acuminate, scabrous or 

 cinereous-pubescent above, densely and finely pubes- 

 cent beneath, serrulate, 2'-$' long, i '-24' wide; heads 

 solitary or few, 2'-3' broad ; involucre hemispheric, 

 its bracts lanceolate, acuminate, densely villous-ca- 

 nescent, somewhat spreading; disk yellow; rays 15- 

 25 ; chaff canescent at* the summit ; mature achenes 

 nearly glabrous; pappus of 2 lanceolate scales. 



In dry barren soil, Massachusetts to New Jersey, Geor- 

 gia, Iowa, Missouri, Kansas and Texas. Aug.-Sept. 



19. Helianthus doronicoides Lam. Oblong- 



leaved Sunflower. Fig. 4479. 



Helianthus doronicoides Lam. Encycl. 3: 84. 1789. 



Perennial by slender rootstocks ; stems stout, rough, 

 or finely rough-pubescent, branched above, 3-7 high. 

 Leaves oblong, ovate-oblong, or ovate, thick, ascend- 

 ing, serrate or serrulate, acute or acuminate at the 

 apex, narrowed at or below the middle to a sessile or 

 slightly clasping base, rough on both sides, or finely 

 pubescent beneath, 3-nerved, 4'-8' long, i'-2i' wide; 

 heads commonly numerous, 2^'-d' broad ; involucre 

 hemispheric, its bracts lanceolate, acuminate, pubescent 

 or hirsute, somewhat spreading ; disk yellow ; rays 12- 

 20, 4"-6" wide; achenes glabrous; pappus of 2 subu- 

 late awns. 



In dry soil, Ohio to Missouri and Arkansas. Recorded 

 from Michigan. Aug.-Sept. 



20. Helianthus decapetalus L. Thin-leaved or Wild Sunflower. Fig. 4480. 



Hleianthus decapetalus L. Sp. PI. 905. 1753. 



Perennial by branched, sometimes thickened root- 

 stocks ; stem slender, glabrous or nearly so, branched 

 above, i-S high; branches puberulent. Leaves 

 thin or membranous, 3'-8' long, i'-3' wide, ovate or 

 ovate-lanceolate* the lower all opposite and slender- 

 petioled, the upper commonly alternate, all usually 

 sharply serrate, roughish above, finely but often 

 sparingly pubescent beneath, acuminate, the rounded 

 or truncate base decurrent on the petiole ; heads nu- 

 merous, 2'-3' broad ; involucre hemispheric, its bracts 

 linear-lanceolate, acuminate, hirsute, long-ciliate, 

 spreading, often longer than the yellow disk; rays 

 8-15, light yellow; chaff entire or 3-toothed, pubes- 

 cent at the apex; achenes glabrous; pappus of 2 

 subulate awns. 



In moist woods and along streams, Quebec to Michi- 

 gan, Georgia, Tennessee and Missouri. Aug.-Sept. 



Helianthus scrophulariaefolius Britton, from near 

 Woodlawn, New York, differing by laciniate-serrate 

 leaves, is probably a race of this species. 



