ORDER 70. COMPOSITE. 459 



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

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

 Aug. 



2 C. carinatum "Willd. Annual; Ivs. bipinnate, fleshy, smooth; invol. scales 

 carinate. Xative 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. Sinnse Sabine. I&rennial; Ivs. coriaceous, stalked, sinuate-pinnatifid, 

 dentate, glaucous ; rays very long. A native of China, where it has long been 

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

 been produced with double, semidouble, and quilled flowers of every possible 

 shade of color. v 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. TANACETUM, L, TANSEY. (Said to be a corruption of Odvaroc, 

 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. vulgare L. Lvs. pinnately divided, segments oblong-lanceolate, pinnatifid and 

 incisely serrate; his. fastigiats-corymbous, ray fls. terete, tubular, ^-toothed. If. 

 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 tansey occurs, with denso and crisped leaves. Eur. 



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

 natifid ; hds. large, corymbd ; 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- 

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



76. ARTEMIS'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, $ , 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. 



Receptacle villous or hairy. Flowers all fertile- Nos. 1, 2 



Receptacle 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 linear Nos. 7 9 



1 A. Pontica L. ROMAN WORMWOOD. Lvs. tomentous beneath, cauline 

 ones bipinnate, leaflets linear; hds. roundish, stalked, nodding. If Common in 

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

 flowers. Head with 2 4 flowers, those of the ray about 6. Prom Austria, f 



2 A. Absinthium L. COMMON WORMWOOD. Lvs. muUifid, clothed with short, 

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

 ceptacle hairy. If. Growing among rubbish, rocks, and by roadsides, N. Eng., 

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

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

 tonic, stomachic, &c. Eur. 



3 A Ludoviciana Xutt. Canescently tomentous all over Ivs. lanceolate, lower 

 incisely and remotely serrate or subpinnatifid, upper entire ; Juls. ovoid, subses- 

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

 to ifo. "W. to Greg. Stem 2 5f high, simple or branched. Leaves quite vari- 

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

 crowded. 



4 A. vulgaris L. MUGWORT. Lvs. canescent-tomentous beneath, cauiine ones pin- 

 natifid, segm. lanceolate, acute, subdentate, floral ones entire, linear-lanceolate- 



