Obdbb 70.— OOMPOSITjE. 459 



flowers is frequently cultivated as a hardy annual. St. about 3f high, striate, 

 smooth, erect, with alternate, clasping Iva. Fls. large, terminal, solitary, yellow. 

 Aug. 



2 C. carindLtum "Willd. AnmiM; Ivs. hipinnate, fleshy, smooth ; invol. scales 

 oarinate. — Native of Barbary. Hds. large and beautiful ; disk purple, rays white, 

 with a yellow base. A variety has rays entirely yellow. Jl. — Oct (C. tricolor 

 Andr.) 



3 C. SinSnse Sabine. Perennial; Ivs. coriaceous, stalked, sinuaie-pinnatifid, 

 de/htate, glaucous ; rays very long. — A native of China, where it has long been 

 cultivated and higlUy esteemed for its beauty. A great number of varieties have 

 been produced with double, semidoable, and quilled flowers of eveiy possible 

 shade of color. It is of very easy culture in any common soil. The plants are 

 propagated by divisions, by suckers, and by cuttings. (Pyrethrum Sinense DC.) 



75. TANACE^TUM, L. Tansbv. (Said to be a corruption of Odvaroq, 

 deathless ; for the durable flowers.) Involucre hemispherical, imbri- 

 cate, the scales all minute ; receptacle convex, naked ; pappus a slight, 

 membranous border ; achenia with a large, epigynous disk. — Lvs. alter- 

 nate, much dissected. Fls. yellow, discoid. 



T. vulgdre L. L/os. pinnaiehj divided, segments oblong-lanceolate, pinnatifld and 

 ' inoisely serrato; hds. fastigiate-oorymbous, ray fls. terete, tubular, S-ioothed. — U 

 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 bitter taste. The seeds are anthelmintic. A variety called 

 double tausey occurs, with dense and crisped leaves. § Eur. 



2 T. Huronense Nutt. Lvs. hipinnately divided, lobes oblong, often again pin- 

 natifld; hds. largo, oorymbd; ray fls. flattened, unequally 3 to 5-cleft. — Shores of 

 Lake Huron and Mackinaw Strait, to Hudson's Bay. Plant 1 to 3f high, some- 

 what tomentous. Hds. larger than in No. 1, citron-yellow. 



76. ARTEffllS'IA, L. Wormwood, &c. (Probably from Artemis, 

 one of the names of the goddess Diana.) Involucre ovoid, imbricate, 

 with dry, convenient scales ; receptacle without pales ; disk-flowers 

 numerous, i^ , tubular, ray flowers few, often without stamens and with 

 a subulate corolla or none; achenia with a small disk; pappus 0. — 

 Bitter herbs. Lvs. alternate. Cor. yellow or purplish, discoid. 



§ Eeceptaclo villous or hairy. Flowers all fertile Nos. 1, 2 



§ Beceptacle naked. — Flowers all fertile. Leaves or segments lanceolate Nos. 8, 4 



— Flowers all fertile. Leaves or segments linear Nos. 5, 6 



— Flowers of the disk sterile. Leaves or segments liifear Nos. 7 — 9 



1 A. Pontioa L. Kom:.4.ii 'Wormwood. Lvs. tomentous beneath, cauline 

 ones bipinnate, leaflets linear; Tids. roundish, stalked, nodding. — 1( Common in 

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

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



2 A. Absinthium L. Common Wormwood. Lvs. muUifid, clothed with short, 

 silky piibescence, both sides ; segments lanceolate ; hds. hemisperical, drooping ; re- 

 ceptacle hairy. — 11 Growing among rubbish, rooks, and by roadsides, N. Eng., 

 Can. Stems angular, branched, with erect racemes of nodding, yellow flowers. 

 The whole plant is proverbiaJly bitter, and of powerfal medicinal quaUties as a 

 tonic, stomachic, &c. § Eur. 



3 A. Iiudovici^na Kutt. Canescently tomentous all over ; lvs. lanceolate, lower 

 inoisely and remotely serrate or subpinnatifid, upper entire ; hds. ovoid, subses- 

 sile, arranged in a simple, slender, leafy panicle. — y Lake and river shores, Mich, 

 to Mo. "W. to Oreg. Stem 2 — 5f high, simple or branched. Leaves quite vari- 

 able in size and also in pubescence, sometimes nearly smooth. Heads small and 

 crowded. 



4 A. vulgaris L. MuOWOBt. Los. canescent-tomentous beneath, cauline ones pin- 

 natifld, segm. lanceolate, acute, subdentate, floral ones entire, linear-lanoeolate ; 



