18-1 ORDER 70. COMPOSITE. 



scales all minute. Reccp. convex, naked. Pap. a slight membranous bor- 

 der. Cyp. with a large, epigynous disk. Lvs. alternate, much dissected 

 Flowers yellow, discoid. 



1 T. vulgare L. Lvs. pinnatifid, segm. oblong-lanceolate, pinnatifid and cut-serrate; 



hds. fastigiate-corymbous, ray-fls. terete, tubular, 3-toothcd. V Waysides 2-3f. Au*. 



2 T. Hnroneiise Nutt. Lvs. bipinnatifld, lobes oblong, often again pinnatifid : head" 



large, corymbed ; ray-fls. flattened, unequally 3-5-cleft. if Sandy shores, W. 2 3f. 



75. CHRYSANTHEMUM, L. Invol. bell-shaped, sc. imbricated, SCM 

 rious at the edges. Recep. flat or convex, naked in the disk. Rays $ , disk 

 Ms. , 5-toothed. Cyp. angular or compressed. Pap. or tooth-like. Plants- 

 ornamental, from E. Asia, with alternate, lobed Ivs. and large rays. Fig. 387. 



PTRETHRDM. Cypselse wingless, angular, all alike. Plants perennial . . . .No*. 13 

 $ CHRYSANTHEMUM. Cyp. of the ray 3-angled. of the disk compressed. Nos. 4, 5 



1 C. SINENSE. Shrubby; Ivs. einnate-pinnatifld, thick, glaucous; rays much longer than 



the obtuse scales. Beautiful flowers of all colors, late in Autumn. 2 St. 



2 . INDICUM. Shrubby ; leaves Sncisely-pinnatifid, thin, flaccid ; rays litile longer than 



the obtuse scales, spreading about 1'. Heads much smaller than in No. 1. 



3 C. ROSEUM. Perennial, glabrous ; Ivs. 2-3-pinnatisect : hds. solitary, terminal ; scales 



brown-edged ; rays rose-colored or white, often double, li Heads 1' broad. 



4 C. CORONARIUM. Annual ; Ivs. clasping, bipinnatifld, lobes dilated at summit ; flowers 



large, terminal, yellow ; pappus none. S. Europe. 3f. Varieties double, <fec. Aug. 



5 C. CARINATUM. Tricolor ed C. Annual; Ivs. thick, bipinnatifld: scales carinate ; ray 



white, yellow at base, disk purple. Barbary. 1 2f. Flowers all Summer. 



76. ARTEMISIA, L. WORMWOOD, &c. Invol. ovoid, imbricate, with 

 dry, connivent scales. Recep. without pales. Disk-fls. numerous, 9 , tubu- 

 lar ; ray-fls. few, often without stamens and with a subulate corolla or none. 

 Cypsela with a small disk. Pappus 0. Bitter herbs. Leaves alternate. 

 Heads yellow or purplish, discoid. Aug., Sept. 



ABSINTHIUM. Recep. villous or hairy. Fl<. all fertile, heterogamous Nos. 1, 



$ ABR6TANUM. Recep. naked. Fls. ail fertile. a Lvs. orsegm. lanceolate.. Nos. 3, 4 



a Lvs. or segm. linear Nos. 5 7 



DRACUNCULUS. Recep naked. Disk-fls. sterile. ft Lvs. trifld or entire... Nos. 8, 9 



o Lvs. pinnatisect Nos. 10 12 



1 A. Absinthium L. Common IF. Leaves ninltifid. clothed with short silky down 



both sides ; seg. lanceolate ; hds. hemispherical, drooping. Waysides, N. l-2f. Eur. 



2 A. frigfda Willd. Lvs. silky canescent. the canline pinnatifid ; seg. linear. 3-5-cleft; 



hds. small, glob., drooping; inner sc. woolly. Rocky hills, Minn. Dak., and W. 6--12'. 



3 A. I-.ndovicia.na N. Canescent-tomentous ; leaves lanceolate, the lower serrate or 



liinnatifld. upper entire ; heads ovoid, in a slender, leafy panicle. 11 Shores, Mich, 

 and W. 2 5f. Heads small and crowded. 



4 A. vnlgaris L. Mvgwort. Lvs. canescent-tomentous beneath, pinnatifld with Ian 



ceolate segments, upper entire ; heads erect, ovoid, subsessile, In a branched panicle. 

 Waysides, N. and W. 3f. Europe. 



5 A. ABR6TANUM. Southernwood. Hoary; leaves bipinnatisect; heads hemispherical, 



nodding, downy. From 8. Europe. 3f. [ding. Eur. Si. 



B A. P6NTICA. Roman W. Lvs. hoary beneath, 2-3-pinnatisect; heads globular, nod- 



7 A. bieniils Willd. Erect, glabrous, simple ; Ivs. 1-2-pinnatifld, lobes sharply serrate 



or cut, those above subentire : hds. globular, erect, spicate, in a vinrate. leafy panicle 



Common westward, migrating E. to Po'keepsic (Gerard), and to Pa. l-3f. Aus - 



