460 ORDER 70. COMPOSITE. 



hds. erect, ovoid, subsessile ; invol. tomentous. ^ Fields, roadsides, banks of 

 streams, &c., Vt., N. H. St. 2 to 3f high, branching into a paniclj of spicato 

 racemes. Lvs. very variable, but never attenuated to linear, now obtuse, now 

 acute, from tho samo locality (Hanover, N. II. Ricard.) Hds. fsw-flowered, 

 purplish. 



5 A. biennis Willd. Plant erect, smooth; Ivs. bipinnately parted, upper ones 

 pinnatind, all with linear, acute, and mostly incised lobes ; lids, sessile, arranged 

 in a close, narrow, leafy panicle of short spikes. 3?) Western States and north- 

 ward. Also eastward to the Hudson R. (Mr. C. B. Gerard.) 



6 A. Abrotanum L. SOUTHERNWOOD. St. erect; lower Ivs. bipinnate; 

 upper ones capillary, pinnate; invoL downy, hemispherical. If A well known 

 shrubby plant in gardens, about 3f high. Lsaves alternate, much divided into 

 very narrow, linear segments. Flowers numerous, nodding, yellow. Xativo of 

 S. Europe. | 



7 A. borealis Pallas. Caespitous, silky-villous or smoothish ; st. simple ; lower 

 Ivs. petiolate, linear-lanceolate, entire towards the base, ternately, pinnatery, or bi- 

 pinnately parted above, with linear lobes, upper linear, 3 to 5-cleft or entire ; hds. 

 hemispherical, spicate or raceraous-paniculatc. ^[-Keweena Pt., Lake Superior 

 (Houghton, in N. Am. Fl.) St. 6 to 10' high. 



8 A. Canadensis MX. SEA WORMWOOD. St. erect or decumbent; Ivs. pin* 

 nali/id with linear segments ; fls. subglobous, sessile, in a panicle of racemes. Z( 

 Rivers and lake shores, N. Eng. and Can. Shores of the great lakes. St. 2 to 4f 

 high, much branched, silicate, brownish, mostly erect. Hds. 2'' diarn., numer- 

 ous, forming a large panicle of racemes. Scales with a membranous margin. 

 Aug. 



9 A. caudata MX. Glabrous, simple, densely paniculate ; Ivs. bipinnately divi- 

 ded, upper pinnate, segm. filiform or setaceous, alternate; hds. ovoid-globous, 

 pedicellate, erect. <i) On the sea-coast, N. II. to Ga. St. 3 to Of high, strict. 

 Lvs. in many thread-like and somewhat ileshy sogm.; hds. 1-i-" diarn., in a strict, 

 dense panicle. Outer scales ovate, inner scarious, elliptical. Aug., Sept. 



77. SOLI V VA Ruiz. <fe Pav. (To Salvator Soliva, a Spanish botan- 

 ist and physician.) Involucre of 5 to 10 to 15 scales in one row; re- 

 ceptacle flat, naked ; fertile flowers in several rows, apetalous ; ? fls. 

 few, interior, with a 3 to 5-toothcd corolla ; achenia obcompressed, tip- 

 ped with the persistent style and no pappus. Little depressed herbs 

 with pinnately divided Ivs. and sessile hds. 



S. nasturtiifolia DC. Plant very small, minutely pubescent ; Ivs. pinnately 5 

 to 9-parted, lobes oblong, obtuse ; scales 10 to 15 ; ach. obconic, rugous, crowned 

 with a dense tuft of wool instead of pappus. S. Car., Ga., near the coast, banks 

 of the Ogeechee, growing with Sencbiera. Plant flat on tho ground, forming a 

 dense mat. Lvs. G to 10" long, lobes 1". lids, disproportionately large (2 to 3" 

 broad), axillary, depressed. Ach. wrinkled transversely. Mar., Apr. 



78. GNAPHA'LIUM, L. CUDWEED. EVERLASTING. (Gr. yvd$a\ov, 

 cotton or wool ; from the soft, cottony surface of the herbage.) Heads 

 discoid, hetcrogamons ; involucre imbricate with scarious, colored 

 scales; marginal flowers subulate, pistillate, mostly in several rows; 

 central flowers ', receptacle flat, naked ; pappus a single row of scab- 

 rous, hair-like bristles. Herbs generally clothed with whitish wool. 

 Lvs. alternate, entire. 



* Heads in terminal cwymbons clusters Nos. 1 S 



* Heads in nxilhiry, somewhat spicate clusters Nos. 4, 6 



1 Q. decurrens Ives. Lvs. decurrent, linear-lanceolate, very acute, naked above, 

 white and woolly beneath , fls. in dense, roundish, terminal clusters. 2| A stout 

 species, covered with a dense, hoary pubescenco. It grows in hilly pastures, &c., 

 N. H. Vt. to N, J. Stem 2f high, with scattered leaves and spreading branches. 



