CLASS XIX. ORDER III. 337 



fields. Stem erect, furrowed, hairy, branched at top. Leaves 

 alternate, cut into a multitude of very small, linear subdivisions. 

 Flowers white, forming a large, flat topped, crowded corymb. 

 Calyx ovate. Disc convex. Florets of the ray four or five 

 The plant has a strong, penetrating taste and smell, and is used 

 medicinally. — July, August. — Perennial. 



FR USTRANEA. 



352. HELIANTHUS. 

 Heliaxthus divaricatus. L. Small, rough Sunflower. 



Leaves opposite, sessile, ovate-oblong, three nerved ; 

 panicle dichotomous. L. 



A showy plant, not uncommon in woods and thickets, flower- 

 ing in August and September. Stem erect, round, smooth, gen- 

 erally covered with glaucous powder. Leaves opposite, narrow- 

 ovate, rounded at base, tapering to a long point, slightly serrate, 

 three nerved, and very rough. Flowers yellow, in the wild 

 plant but few in number, in the cultivated one numerous. 

 Branches of the panicle either forked or three parted. — Perennial. 



This plant has an agreeable, somewhat spicy odor. 



Helianthus DECAPETALts. WHld. Ten rayed Sunflower. 

 Leaves ovate, acuminate, remotely serrate, rough ; 

 scales of the calyx subequal ; rays ten or tv/elve. 



Three or four feet high. Leaves triply nerved. Scales of the 

 calyx lanceolate, nearly equal. Flowers showy, yellow. Dry 

 woods in the interior of the state. — August. 



353. COREOPSIS. 

 Coreopsis trichosperma. Mich. Tickseed Sunflower. 

 Leaves mostly five pinnate; leafets lanceolate ; re- 

 motely cut-serrate ; leafets of the outer calyx ciliate ; 

 ray entire ; seeds wedge form. Midi. abr. 



Stem about two feet high, glabrous. Leaves glabrous, pin- 

 nate. Leafets five or seven, distant, linear-lanceolate, ending in 

 a long, slender point, furnished with a few deep serratures or 

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