COMPOSITE. 215 AMMOBIUM, 



in a small, terminal corymb, woolly, and of a purplish white. The flowers of 

 Bome plants are all barren, of others all fertile. April — Sept. Per. 



Mouse-car Life- everlasting. 



44. FI'LAGO. 



Heads heterogamous; involucre of few villose scales; 



marginal flowers pistillate ; receptacle columnar, naked at the 



summit, chaffy at base; achenia terete, the central ones with 



a hairy pappus. 



Downy-canescent herbs, apparently named from the Lat.^/a, thread, from 

 its cottony-like fibres or hairs. Leaves alternate, entire. The scales of the 

 involucre pass insensibly into those of the columnar receptacle, each embrac- 

 ing a pistillate flower in its axil. 



F. GeRMA'NICA. L. Gnaphalium. Germanica. P. 



Woolly tomentose ; stem dichotomous or proliferously branched above ; 

 haves linear-lanceolate, acute, crowded, erect; heads few-tiowered, in dense, 

 capitate clusters, terminal and lateral ; scales cuspidate, the outer ones woolly. 

 A European plant introduced into our roadsides, old fields, t&c, but not very 

 common. The stem is 6 to 10 inches high, often branching above from the 

 midst of the globose cluster of heads. Leaves numerous, less than an inch in 

 length, sessile, woolly on both sides. Scales straw-colored, with a green line 

 outside. July — Oct. Ann. Cudioeed. 



45. TANACE'TUM. 

 Involucre hemispherical, imbricate, the scales all minute; 

 receptacle convex, naked ; pappus a slight, membranous 

 border; achenia with a large epigynous disk. 



A corruption oi Mhanasia, which is from the Gr. a, privative, and ^avciroi^ 

 death ; from the durability of the flowers. Lvs. alternate, moch dissected. 

 Fls. yellow. 



T. vulga're. 



Leaves doubly pinnate, incisely serrate. The common tansey is native of 

 Europe, naturalized in old fields, roadsides, &c. Stems 2 — 3 feet high, 

 terminating in handsome corymbs of yellow flowers. A variety with dense 

 and crisped leaves occurs, called double tansey. The whole plant has a strong, 

 aromatic smell and very bitter taste. The seeds are anthelmintic. Aug. 

 Per. Tanseij. 



46. AMMO'BIUM. 

 Heads homogamous; involucre imbricate, colored, radiant; 

 anthers with 2 bristles at base; receptacle distinctly chaffy ; 

 pappus a toothed edge. 



Gr. cr^^o«, sand, [iico, to live ; referring to the place of its nativity in New- 

 Holland. 



A. ala'tum. 



Leaves oblong, wavy, decurrent. Native of New-Holland. A pretty 

 herbaceous, half hardy plant of easy culture in any garden soil. The stalks 

 are branched, 2 feet high, curiously winged by the "decurrent leaves. Heads 

 Bolitary, terminal, with dry, white, involucral scales. Per, IVinged Ammohiiivi. 



