composite:. 202 baccharis. 



17. I'NULA. 

 Heads many-flowered; involucre imbricate; ray-flowers 

 numerous, pistillate, disk flowers perfect; receptacle naked; 

 pappus simple, scabrous; anthers with 2 bristles at base. 



Coarse, perennial, European herbs, with alternate leaves and yellow 

 flowers. 



I. Hele'nium. 



Le'ivcs amplexieaul, ovate, rugose, downy beneath ; involucre scales ovate. 

 A large herbaceous, coarse looking plant, common by road-sides, naturalized. 

 Stem 4— 6 feet high, furrowed, branching and downy above. Radical leaves 

 very large, 1—3 feet in length, and 6—12 inches wide, serrate, those of the 

 stem clasping. Flowers large, solitary, terminal, of a bright yellow. Rays 

 linear, with 2 or 3 teeth at the end. The medicinal virtues of the plant have 

 long been esteemed. These are tonic and expectorant. Flowers in July and 

 August. Elecampane. 



Section III. Heads discoid. 

 18. PLU'CHEA. 

 Heads many-flowered, those of the margin pistillate, of the 

 centre perfect but sterile ; involucre imbricated; receptacle 

 flat, naked ; style undivided ; pappus capillary, simple. 



Strong-scented herbs with alternate leaves and corymbs of purple flowers. 



P. CAMPHORA'TA. Dc. Conyza camphorata. M((A. C. Marilandica. ilfe. 



Leaves ovate-lanceolate, somewhat pubescent, acute, serrate, serratures 

 mucronate ; flowers in crowded corymbs. A fleshy, strong-scented plant, 

 native of salt marshes. Stem a foot high, thick, downy, with alternate leaves 

 and axillary branches. Flowers light purple. Aug. Per. 



19. BACCHA'RIS. 

 Heads many-flowered, dioecious; involucre imbricate, cylin- 

 dric or ovate, with subcoriaceous, ovate scales; sterile flowers 

 with the stamens exserted ; receptacle naked ; pappus ca- 

 pillar}'. 



The ancient Gr. name, from Bacchus, because dedicated to him. Shrubby 

 plants with alternate leaves and white flowers. 



B. halimifo'lia. 



Shrubby ; leaves obovate, incisely dentate above, the highest ones lanceo- 

 late ; 'panicle compound, leafy ; fascicles pedunculate. This is almost the 

 only arborescent plant of this" order found in tlie Northern States. It is 6—12 

 feet high, growing on sea coast, and river alluvion. Every part is covered 

 with white du.st. °Tlie fertile heads growing upon separate plants are in large, 

 loose, terminal panicles, and furnished with very long, slender pappus. 

 Corollas white. Sept. The beauty of this shrub entitles it to cultivation. 



Groundsel Tree. 



Tribe IV. SENECIONIDE.E. 



fTeads radiate, or discoid. Branches of the style linear, hairy or hispid at the apex which is eitlur 

 truncaled or produced into a conical or elongated appendage. Leaves opposite or alternate. 



Section I. Heads radiatc> 



