460 ■ Order 70.— COMPOSITE. 



hd3. erect, ovoid, subsessile ; invol. tomentoua. — % Fields, roadsides, banks of 

 streams, Ac, Vt., Hf. H. St 2 to 3f high, branching into a panicle of spicate 

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

 acute, from the ■ same locality (Hanover, N. H, Rioard.) Hds. few-flowered, 

 purplish. 

 5 A. biSnniB WiUd. Plant erect, smooth; lvs. bipinnately parted, upper ones 

 pinnatifld, aU with linear, acute, and mostly incised lobes ; hds. sessile, arranged 

 in a dose, narrow, leafy panicle of short spikes.— r® 'Westem States and north- 

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



6 A. Abrotanum L. Southernwood. Si. erect; lower lvs. bipinnate; 

 upper ones eapiUary, pinnate; invol downy, hemispherical. — 2J! A well known 

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

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

 S. Europe. | 



7 A. borealis Pallas. Ocespitous, silky-villous or smoothish; St. simple; Ibwer 

 lvs. petiolate, linear-lcmceolate, entire towards the base, temately, 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., Lake Superior 

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



8 A. Canadensis Mx. Sea 'Wokmwood. St. erect or decumbent; lvs. pin- 

 naiifidwith linear segments; Jls. subglobous, sessile, in a panicle of racemes. — If. 

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

 high, much branched, suloate, brownish, mostly erect Hds. 2'' diam., numer- 

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

 Aug. 



9 A. oordata Mx. Glabrous, simple, densely paniculate; lvs. bipinnate-pubes- 

 cent, upper pinnate, segm. filiform or setaceous, alternate; hda. ovoid-glpbous, 

 pedicellate, erect — ® On the sea-coast, N. H. to Ga. St 3 to 5f high, strict. 

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

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



77. SOLrVA 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; $fla. 

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

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

 with pinnately divided lvs. and sessile hds. 



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

 to 9-parted, lobes oblong, obtuse; scales 10 to 15 ; ach. oboonio, 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. Ach. wrinkled transversely. Mar., Apr. 



78. GNAPHA^LIUM, L. Cudweed. Everlasting. {Gr. yvd^aXov, 

 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 eorymboiis clusters , Nos. 1 — 3 



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



1 G. deciirrena Ives. I/as. demrrent, 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 hiUy pastures, &o., 

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



