^0 LXXV. COMPOSITE. Gnaphalium. 



what fleshy segments. Heads small. Outer scales ovate, inner scarious, ellip- 

 tical. Aug. Sept. 



ij 2. Receptacle naked. Flmcers all fertile. 



6. A. Abrotanum. Smthernwood. — )S<. erect; lov:er Ivs. bipinnate ; upj>er ones 



capillary, pinnate ; invol. downy, hemispherical. — A well known shrubby plant 



in gardens, about 3f' high. Leaves alternate, much divided into very narrow, 



linear segments. Flowers numerous, nodding, yellow. Native of S. Europe. + 



7. A. LuDoviciANA. Nutt. 



Herbaceous, canescently tomentose ; Ivs. lanceolate, lower incisely and 

 remoiely serrate or subpinnati/id, upper entire ; hds. ovoid, subsessile, arranged 

 in a simple, slender, leafy panicle. — Lake and river shores, Mich, to Mo. W, 

 to Oreg. Stem 2 — 5f high, simple or branched. Leaves quite variable in size, 

 and also in pubescence, sometimes nearly smooth. Heads small and crowded. 

 Aug. Sept. 



8. A. VULGARIS. Common A'^temisia or Mugv:ort.. 



Lvs. tomentose beneath, cauline ores pinnatifid, segments lanceolate, 

 acute, subdentate, floral ones entire, linear-lanceolate ; hds. erect, ovoid, sub- 

 sessile ; invol. tomentose. — % Introduced from Europe and naturalized in fields, 

 roadsides, banks of streams, &c., Vt. JN. H. Stem 2 — 3f high, branching 

 into a panicle of spicate racemes. Leaves very variable, but never nearly so 

 attenuated as in A. Canadensis. Heads Jew, purplish. 



9. A. BIENNIS. Willd. 



Erect, herbaceous, smooth ; lvs. bipinnately parted, upper ones pinnatifid, 

 all with linear, acute and mostly incised lobes; hds. sessile, arranged in a close, 

 narrow, leafy panicle of short spikes. — Ohio to Mo. and the Saskatchawan. 

 T. 4- G. Aug.— Oct. 



§ 3. Receptacle villous or hairy. Flowers all fertile. 



10. A. Absinthium. Common Wormwood. 



Lis. inultifid, clothed with short, silky down, segments lanceolate; hds. 

 hemispherical, drooping; receptacle hsuivy. — Naturalized in the mountainous dis- 

 tricts of New England, growing among rubbish, rocks and by roadsides. Stems 

 angular, branched, with erect racemes oi nodding, yellow flowers. The whole 

 plant is proverbially bitter, and of powerful medicinal qualities as a tonic, 

 stomachic, &c. ^ ^ 



11. A. PoNTicA. Roman Wormword. — Lvs. tomentose beneath, cauline one^ 

 bipinnate, leaflets linear ; hds. roundish, stalked, nodding. — Common in gar 

 dens, where it arises 3 or 4f, with simple branches and racemes of yellow flow 

 ers. Head with 24 flowers, those of the ray about 6. From Austria, f 



53. TANACETUM. 



Said to be a corruption of a flacaruf , deathless ; for the durable flowers. 



Involucre hemispherical, imbricate, the scales all minute ; recep- 

 tacle convex, naked ; pappus a slight, membranous border ; achenia 

 with a large, epigynous disk. — Lvs. alternate.^ much dissected. Fls. 

 yellow. 



T. vui.GARE. Tansey. — Lvs. pinnately divided, segments oblong-lanceolate, 

 pinnatifid and incisely serrae; hds. fastigiate-corymbose. — % Native of Europe, 

 and naturalized in old fields and roadsides. Stems clustered, 2 — 3f high, 

 branched above into a handsome corymb of yellow flowers. Aug. — The whole 

 plant has a strong and aromatic smell and a very bitter taste. The seeds are 

 anthelmintic. A variety called do^Me tanscij occurs, with dense and crisped 

 leaves. ^ 



54. GNAPHALIUM. 



CrT. yva<pa'Xov, cotton or wool; from the soft, cottony surface of the herbage. 



Heads discoid, heterogamous ; involucre imbricate with scarious, 

 colored scales ; marginal flowers subulate, pistillate, in several rows ; 



