412 Order 10.— COMPOSITE. 



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

 stem Ivs. 5 to T by 3 to 5', upper about 2' by 1^', the highest oblong, siuallor, 

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

 2 E. tomentosua L. Si. hirsute, nearly leafless, simple or dichotomous above; 

 radical Ivs. large, hirsute-tomentous, oblong-spatulate or oborate, creuate, nai- 

 rowed to a winged petiole, cauhne 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.-^Varie3 with more branches and 

 leaves, towards No. 1. 



Tribe 2. EUPATORIACE^. 



4. AGERATUM L. (Qr. a (privative) and yTjpag, old age ; i. e., fade- 

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

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

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

 awned scales. — ®(D Mostly tropical, with opposite, petioled Ivs. and 

 oorymbed heads. 



A. conyzoides L. Branching; Ivs. ovate, tooth-crenate, acute or cordate ,-t 

 base, somewhat rugous ; 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. Pis. blue or white. Apr., Jn. § The cultivated variety called A. Mexi- 

 oana has nearly all its leaves cordate, and flowers always 7 blue. 



5. SCLEROL'EPIS, Cass. (Gr. anXrjpog, hard, Xenig, scale.) Head 

 OD-flowered, f^ , discoid ; scales equal, linear, in 2 series; receptacle 



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

 style much exerted ; achenia 6-angled, crowned with a cup-shaped 

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

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



S. vertioillata 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 sohtary at the top of the stem. Jl. — Sept. (Sparga- 

 nophorus Mx.) 



6. CARPHEPH'ORUS, Cass. (Gr. Kdp(j)og, chaff, (j>ip(d, to bear; for 

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

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

 shorter than the flowers. — 21 Sts. simple, leafy, corymbous at top, with 

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



* Scales of the involQcre acute, downy-tomentous No3. 1, 2 



♦ Scales of the involucre rounded-obtase, nearly glabrous Uoa. 3, 4 



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

 glabrous, linear-subulate, rigid, the cauline gradually shorter, closely appressed to 

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

 lato, appre.s3ed. — Gadsden Co., Fla. to Ala. and La. Plant strictly erect, 2f high, 

 its tomentum grayish. Hds. 15 to 20-flower6d. (L. squamosa Nutt.) 



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

 late, peHolate ; cauline lance-ovaie, sessile, erect, the upper pubescent; scales lance. 

 ovate, acute, mostly appressed, glandular tomentous, — Swamps, Va, to Ga. St 

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

 Sept., Oct. (L. Walteri, Ell.) - 



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

 petiolate, obtuse, S-veined, caMline mostly Unear ; branches with 1 to 5 heads ; 



