424 



COMPOSITAE. 



[Vol. III. 



7. Helianthus occidentalis Riddell. 

 Few-leaved Sunflower. (Fig. 3904.) 



H. occidenlalis Ridd. Suppl. Cat. Ohio PI. i;,. 1836. 



Perennial; stems appres-sed-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 I or 2 

 pairs of small distant leaves; heads several or soli- 

 tary, I'/z'-iYi' broad; involucre hemispheric, its 

 bracts lanceolate or ovate-lanceolate, acute or acumi- 

 nate, generally ciliate, appressed; receptacle convex, 

 its chaff acute; disk j'ellow; 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. 



3905-) 



8. Helianthus laevigatus T. & G. Smooth Sunflower, 



Helianthuslaevigatus-i. &G. Fl. 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, yi'-iyi' 

 wide, the margins sometimes roughish; heads 

 few or solitary, I'-iJ^' broad; involucre campanu- 

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

 ciliolate, the tips of the outer ones spreading; 

 rays .s-io; 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, mouutainsof Virgriniaand North Caro- 

 lina. Aug.-Oct. 



9. Helianthus microcephalus T. &G. 



Small Wood Sunflower. (Fig. 3906.) 



Helianthus parviflnriis Bernh. ; Spreng. Syst. 3: 



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

 Helianlhus microcephalus T. & G. Fl. X. 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'-;' long, ',i'-l%' 

 wide; heads commonly several or numerous, 

 borne on slender, sometimes roughish pedun- 

 cles, yz'-l%' 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; rays5-ro; 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- 

 aa. July-Sept. 



