184 OHDEK 70. COMPOSITE. 



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

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

 Flowers yellow, discoid. 



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



hds. fastigiate-corymbous, ray-fls. terete, tubular, 3-toothed. y. Waysides 2-3f. Aug. 



2 T. Hnronense Nutt. Lvs. bipinnatifid, lobes oblong, often again pinnatiftcl; heads 



large, corymbed ; ray-fls. flattened, unequally 3-5-cleft. li Sandy shores, \V. 2 3f. 



75, CHRYSANTHEMUM, L. Inv-ol. bell-shaped, sc. imbricated, sea- 

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

 fls. 5 , 5- toothed. Gyp. angular or compressed. Pap. or tooth-like. Plants 

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



PrKETHRUM. Cypselae wingless, angular, all alike. Plants perennial Nos. 13 



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



1 C. SINENSE. Shrubby ; Ivs. sinuate-pinnatifid, thick, glaucous ; rays much longer than 



the obtuse scales. Beautiful flowers of all colors, late in Autumn. 2 3f. 



2 C. INDICUM. Shrubby; leaves incisely-pinnatifid, thin, flaccid; rays little longer than 



the obtuse scales, spreading about V. 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 doiible. li Heads 1' broad. 



4 C. CORONARUJM. Annual ; Ivs. clasping, bipinnatifid, lobes dilated at summit ; flowera 



large, terminal, yellow ; pappus none. S. Europe. 3f. Varieties double, &c. Aug. 



5 C. CARINATUM. Tricolored C. Annual; Ivs. thick, bipinnatifid ; scales carinate ; rays 



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



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

 diy, connivent scales. Recep. without pales. Disk-fls. numerous, 5 , tubu- 

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

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

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



ABS!NTHIUM. Recep. villous or hairy. Pis. all fertile, hetcrogamous Nos. 1, 



ABB6TA.NUM. 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. b Lvs. trifid or entire... Nos. 8, 9 



b Lvs. pinnatisect....Nos. 1012 



1 A. Absinthium L. Common W. Leaves multifid, clothed with short silky down 



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



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



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



3 A. LiUdovicIana N. Canescent-tomentous ; leaves lanceolate, the lower serrate or 



pinnatifid, upper entire ; heads ovoid, in a slender, leafy panicle. ii Shores, Mich. 

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



4 A. vulgaris L. Mugwort. Lvs. canescent-tomentons beneath, pinnatifid with lan- 



ceolate segments, upper entire ; heads erect, ovoid, subscssile, in a branched panicle. 

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



5 A. ABROTANUM. Southernwood. Hoary; loaves bipinnatiscct ; heads hemispherical, 



nodding, downy. From S. Europe. 3f. [cling. Eur. SI'. 



6 A. PONTICA. Roman W. Lvs. hoary beneath. 2-3-pinnatisect : heads globular, uod- 



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



or cut, those above subentirc ; hds. globular, erect, spicate, in a virgate, leafy panicle. 

 (D Common westward, migrating E. to Po'keepsie (Gerard), and to Pa. l-3f. Ausi > 



