412 Order 70.— COMPOSIT-ffl. 



Ohio to Fla. and La. St. 20 to 30' high, flexuous, the branches divaricate. Lower 

 stem Ivs. 5 to 7' by 3 to 5', upper about 2' by 1^', the highest oblong, smaller, 

 subtending the glomerules in the form of an invol. Scales 3" long. Jl. — Sept 

 2 E. tomentdsus L. St. hirsute, nearly leafless, simple or dickoiommis oAove; 

 radical Ivs. large, hirsute-tomentous, oblong-spatulate or obovate, crenate, nar- 

 rowed to a winged petiole, cauline small and bract-like at the forks, or none ; 

 bracts thick, broad-ovate, scales rigid. — S. Car., Ga., Fla., to La., common in the 

 pine woods. St. 1 to 2f, often quite simple, with a single, large glomerule at top. 

 The stiff, acute scales are 5" long. JL — Sept. — ^Varies with more brajiches and 

 leaves, towards No. 1. 



Tribk 2. EUPATORIACEJE. 



4. AGERA^TUffl L. (Gr. a (privative) and yrjpag, old age ; i. e., fade- 

 less ; misapplied in this case.) Heads oo-flowered, ^ , discoid ; scales 

 linear, imbricated, pointed; receptacle naked; corollas all tubular; 

 fruit (cypsela) 5-angled, narrowed at base ; pappus 5 to 10 chaffy, 

 awned scales. — CD© Mostly tropical, with opposite, petioled Ivs. and 

 corymbed heads. 



A. conyzoides L. Branching; Iva. ovate, tooth-crenate, acute or cordate at 

 base, somewhat ragous ; pappus of 5 subulate, denticulate scales as long as the 

 cor. but much shorter than the conspicuous branches of the style. Near Sa- 

 vannah (Pond). Sts. 12 to 18' high, downy. Lower petioles half as long as the 

 leaves. Fls. blue or white. Apr., Jn. § The cultivated variety called A. Mexi- 

 cana has nearly all its leaves cordate, and flowers always ? blue. 



5. SCLEROL'EPIS, Cass. (Gr. aKXrjpog, hard, AsTr/f, scale.) Head 

 oo-flowered, ij , discoid ; scales equal, linear, in 2 series ; receptacle 



naked ; corolla 5-toothed, enlarged at the throat ; branches of the 

 style much exerted ; achenia 5-angled, crowned with a cup-shaped 

 pappus of 5 obtuse, horny scales. — 2f Aquatic, glabrous, simple, with 1 

 to 3 terminal hds. Lvs. vertioillate ; fls. purple. 



S. vertioillSta Cass. In shallow water, N. J. to Fla. St. decumbent at base, 1 

 to 2f high. Lvs. in numerous whorls of about 6' linear-setaceous, entire, 1' in 

 length. Head commonly solitary at the top of the stem. Jl. — Sept. (Sparga- 

 nophorua Mx.) 



6. CARPHEPH'ORUS, Cass. (Gr. Kapipog, chafi; 0epw, to bear; for 

 • its chafi'y receptacle.) Heads (about 20-flowered), involucre, flowers 



and fruit as in Liatris ; receptacle chaffy ; pales narrow, 3-veined, rigid, 

 shorter than the flowers. — 2J! Sts. simple, leafy, corymbous at top, witli 

 middle sized heads of purple flowers. (Liatris, Mx. Ell.) 



* Scales of the involucre acute, downy-tomentous Nos. 1, 2 



* Scales of the involucre rounded-obtuse, nearly glabrous Noa. 8, 4 



1- C. pseudo-liatris Cass. Slender, erect, tomentous-pubescent ; fos. nearly 

 glabrous, Umar-sulmlate, rigid, the cauline gradually shorter, closely oppressed to 

 and covering the stem ; hds. few in a racemous cyme ; -scales rigid, ovate-lanceo- 

 late, appressed. — Gadsden Co., Fla. to Ala. and La. Plant strictly erect, 2f iiigh, 

 its tomentum grayish. Hda. 15 to 20-ilowered. (L. squamosa Nutt.) 



2 C. tomentdsus Torr. & Gr. Erect, downy and corymbous above ; rt. lvs. lanceo- 

 late, petiolate ; cauline lance-ovate, sessile, erect, the upper pubescent; scales lance, 

 ovate, acute, mostly appressed, glandular tomentoua.— Swamps, Ta. to Ga. St. 

 2f high, bearing a loose, spreading corymb. Pales linear, pappus purplish. 

 Sept, Oct (L. Walteri, EU.) 



3 C. bellidifdlius Torr. & Gr. Low, nearly glabrous, tufted; root-lvs. spatulate, 

 petiolate, obtuse, 3-.veined, cauline mostly linear ; branches with 1 to 5 heads; 



