COMPOSITAE. 



[Vol. III. 



7. Helianthus occidentalis Riddell. 

 Few-leaved Sunflower. (Fig. 3904.) 

 H. occidentalis Ridd. Suppl. Cat. Ohio PI. 13. 1836. 



Perennial; stems appressed-pubescent or some- 

 times nearly glabrous, slender, mostly simple, 2-3 

 high. Leaves mainly basal, firm, ovate or oblong- 

 lanceolate, obtuse or obtusish at the apex, narrowed 

 at the base, 3-5-nerved, serrulate or entire, scabrous 

 above, pubescent beneath, with slender petioles of 

 about their own length; stem usually bearing 1 or 2 

 pairs of small distant leaves; heads several or soli- 

 tary, i^ / -2^ / broad; involucre hemispheric, its 

 bracts lanceolate or ovate-lanceolate, acute or acumi- 

 nate, generally ciliate, appressed; receptacle convex, 

 its chaff acute; disk yellow; rays 12-15; achenes 

 truncate and pubescent at the summit; pappus of 2 

 lanceolate-subulate awns. 



In dry soil, Ohio to Minnesota, south to Florida and 

 Missouri. Aug.-Sept. 



8. Helianthus laevigatus T. & G. Smooth Sunflower. (Fig. 390.5.) 



Helianthus ZaevigalusT. & G. PI. N. A. 2: 330. 1842. 



Stems slender, from a perennial root, simple or 

 little branched, glabrous, or somewhat glaucous, 

 2-6 high. Leaves nearly all opposite, firm, 

 glabrous, lanceolate, short-petioled, or the upper 

 sessile, serrulate or entire, pale beneath, acumi- 

 nate, narrowed at the base, 3 / -6 / long, y 2 '-x l /z f 

 wide, the margins sometimes roughish; heads 

 few or solitary, i / -i^ / broad; involucre campanu- 

 late, its bracts lanceolate or ovate-lanceolate, firm, 

 ciliolate, the tips of the outer ones spreading; 

 rays 5-10; disk yellow; chaff linear; achenes 

 slightly pubescent at the summit; pappus of 2 

 lanceolate or ovate awns, with or without 2 inter- 

 mediate scales. 



In dry soil, mountains of Virginia and North Caro- 

 lina. Aug. -Oct. 



9. Helianthus microcephalus T. &G. 



Small Wood Sunflower. (Fig. 3906.) 



Helianthus parviflorus Bernh.; Spreng. Syst. 3: 

 617. 1826. NotH.B.K. 1820. 



Helianthus microcephalus T. & G. Fl. N. A. 2: 

 329. 1842. 



Stems slender, glabrous, branched above, or 

 rarely simple, 3-6 high. Leaves thin or thin- 

 nish, petioled, most of them opposite, lanceo- 

 late, or the lower ovate-lanceolate, rough above, 

 canescent or puberulent beneath, long-acumi 

 nate at the apex, narrowed at the base, serru 

 late, or the lower serrate, 3 / -J / long, K /_I 

 wide; heads commonly several or numerous, 

 borne on slender, sometimes roughish pedun- 

 cles, Yz f -\]i' wide; involucre campanulate, its 

 bracts lanceolate or ovate, acute or acuminate, 

 ciliolate, the tips of the outer ones spreading; 

 chaff of the receptacle oblong, entire, or 3- 

 toothed; rays 5-10; disk yellow; achenes nearly 

 glabrous; pappus usually of 2 subulate awns. 



In moist woods and along streams, Pennsylvania to Georgia, west to Ohio, Missouri and Louisi- 

 ana. July-Sept. 



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