COMPOSITJE. 207 ACHILLEA. 



H. autumna'le. 



Lmves lanceolate-serrate, smooth or slightly pubescent, deciirrent ; foicers 

 loosely corymbose. In damp places. Stem 2 — 3 feet high, branching, 

 strongly winged by the decurrent leaves. Leaves tapering to each end or 

 elliptTc-hinceolate, more or less deeply serrate. Flowers large, numerous, 

 terminal, with drooping rays, each ending in 3 obtuse teeth, and longer than 

 the large, globose disk? The plant is very bitter. Aug. Per. Sneeze-tcort. 



29. A'NTHEMIS. 

 Involucre hemispherical, with nearly equal scales; rays 

 numerous, pistillate; receptacle cliatfy, convex or conic; 

 achenia crowned wiihasiigiit border. 



Gr. ctvSni, a flower, on account of the multitude of flowers with which the 

 plants are covered. European herbs with much divided leaves. 



1. A. arve'nsis. 



Receptacle conic; chaff lanceolate; seeds crowned widi an entire marginal 

 pappus; leaves bipinnate, subdivided, the segments linear-lanceolate, acute. 

 Grows in dry cultivated fields. A pilose, inodorous plant, somewhat natural- 

 ized in the Northern States. Stems diitusely branching, 6 — 15 inches liigh. 

 Heads large, solitary on the leafless, downy summits of the branches. Disk 

 yellow, rays white. July. Bien. Corn Chainomile. 



2, A. NO'biLIS. — SroJes of the receptach membranous, scarcely longer 

 than the disk ; /mucs bipinnate, the segments linear-subulate, a little downy. 

 Native of Britain and other parts of Europe. Grows wild occasionally in 

 fields and is cultivated in gardens. The strong and agreeable scent of the 

 chamomile is well known, also its tonic and anodyne qualities, which chiefly 

 reside in the flowers. July — Sept. Per. C'Jiamomile. 



3 0. M A R U' T A . 

 Involucre hemispherical, imbricated; rays neutral; disk 

 perfect; receptacle conical, chaiFy (at least at the summit); 

 pappus 0; achenia smooth. 



European herbs, naturalized. Lvs. alternate, much divided, 



M. Co'tULA. Dc. Anthemis Cotula. L. 



Receptacle conic; cA//jf bristly ; achenia naked; leaves doubly pinnatifid, 

 smoothish. The Maywi'cd is naturalized in all waste places in hard, dry soils, 

 especially by roadsides, in patches of great extent, presenting almost a uniform 

 whitish suiface when in bJossom. Stem branching, diffuse, a foot high, with 

 alternate leaves divided and subdivided into a multitude of segments. Flow- 

 ers solitary, on terminal, striated stalks The plant is ill scented. Linnaeus 

 says it is grateful to toads, drives away fleas, and is annoying to flies. June 

 — Sept. Ann. May-weed. 



31. ACHI'LLEA. 

 Involucre ovate, imi)ricate, unequal; rays 5 — 10, short, 

 pistillate; receptacle flat, chaffy ; achenia without a pappus. 



Named after Achilles, a disciple of Chiron, said to be the first physician 

 who used it in healing wounds. Perennial herbs with much-divided, alternate 

 leaves. 



