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. Native of Barbary. Hds. large and beautiful ; disk purple, rays whke, 

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

 Andr.) " 



3 C. Sinense Sabine. Perennial; Ivs. coriaceous, stalked, sinuate-pinnatifid, 

 dmtate, glaucous; rays very lOng.^-A native of China, where it li!,s long been 

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

 been produced with double, semidouble, and quilled Mowers of every 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. TANACETUM, L, TANSY. (Said to be a corruption of Se ava ,i a , 

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

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

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

 nate, much dissected. Fls. yellow, discoid. 



T. vulgaro L. Lvs. pinnately divided, segments oblong-lanceolate, pinuatifid and 

 incisely serrate; his. fastigiato-coryinbous, ray fly. terete, tubular, 3-toothed. It 

 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 tansay occurs, with denso and crisped leaves. Eur. 



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

 uatifid ; hds. largo, corymbd ; ray fls. flattened, uiequa'Jy 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. ARTEMIS'IA, L. WORMWOOD, <fc.c. (Probably from Artemis, 

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

 with dry, connivent 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, $ 



$ Receptacle naked. Flowers all fertile. Leaves or segments lanceolate Nos. 3, 4 



Flowers all fertile. Leaves or segments linear Nos. 5, 8 



Flowers of the disk sterile. Leaves or segments linear Nos. 79 



1 A. frfgida Willd. Lvs. pinnately parted, silky canescent, Ifls. linear and 3 5- 

 cleft; heads nodding, globuo?, in panic-led racemes; scales of the invol. canescent, 

 roundish, the inner oblong; corollas glabrous. Rocky hills, Minnesota, Dakota, 

 and westward. Plant branched Irom base, 612'. July Aug. 



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

 silky pubescence, both sides ; segment* lanceolate; hd* hemisperical, drooping; re- 

 ceptacle hairy. 1 Growing among rubbish, rocks, and by roadsides, N. Eng., 

 Can. Stems angular, branched, w!l!i erect racemes of nodding, yellow flowers. 

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

 tonic, etomachic, &c. Eur. 



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

 incisely and remotely serrate or subpinnatilid, upp3r entire ; hds. ovoid, subses- 

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

 to Mo. W. to Oreg. Stem 2 of 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, cauline onea pin- 

 natifid, segm. lanceolate, acute, subdontate, floral ones entire, linear-lanceolate; 



