460 ORDER 70. COMPOSITE. 



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

 streams, &c., Vt., N. H. St. 2 ta 3f high, branching into a panicle of spicate 

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

 acute, from the samo locality (Hanover, N. H. Elcard.) lids, few-flowered, 

 purplish. 



5 A. bi6nnis Willd. Plant erect, smooth; Ivs. bipiunately parted, upper ones 

 pinnatifid, all with linear, acute, and mostly incised lobes ; hds. sessile, arranged 

 in a close, narrow, leafy panicle of short spikes. (D Western States and north- 

 ward. Plant 1 to 3f high. Aug. Oct. 



6 A. Abrotamim. 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. Leaves alternate, much divided into 

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

 S. Europe. \ 



7 A. borealis Pallas. C&spitous, silky-villous or smoothish ; st. simple ; lower 

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

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

 hemispherical, spicate or racemous-paniculate. ^Keweena Pt., Lako Superior 

 (Houghton, in N. Am. PI.) St. 6 to 1.0' high. 



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

 natifid with linear segments ; fis. subglobous, sessile, in a panicle of racemes. 11 

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

 high, much branched, sulcate, brownish, mostly erect. Hds. 2 7 diam., numer- 

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

 Aug. 



9 A. cordata MX. Glabrous, simple, densely paniculate; Ivs. bipinnate-pubes- 

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

 pedicellate, erect. (2) On the sea-coast, N. H. to Ga. St. 3 to 5f high, strict. 

 Lvs. in many thread-like and somewhat fleshy segm. ; hds. I}" diam., in a strict, 

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



77. SOLI N VA Ruiz. & 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 ; $ fis. 

 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 the ground, forming a 

 dense mat. Lvs. 6 to 10" long, lobes 1". Hds. disproportionately large (2 to 3" 

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



78. GNAPHA'LIUM, L. CUDWEED. EVERLASTING. (G 

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

 discoid, heterogamous ; 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 corymbous clusters ...... : ................................... Nos. 13 



* Heads in axillary, somewhat spicate clusters ..................................... Nos. 4, 5 



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

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

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

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



