416 Okdbb to.— composite. 



upper setaceous, simple, fasoided; hda. small, very numeious, 3 to o-flowered, on 

 short pedieels ; scales 8 to 10, mucronate. — A common weed, in fields and damp 

 soils, Va. to Pla. St. 3 to lOf high, bearing innumerable fine out Ivs. and a com- 

 pound pyramidal, panicle of innumerable hds. Hs. yellowish-white, little more 

 than 1" long. Lvs. often channeled on the upper side. Sept., Oct. 



2 E. coroiip,pifd]iiiiii Willd. Much branched, pubescent; lvs. mostly alternate 

 (the lower opposite), the lower twice pinnaiifid with lance-linear hies and segments.; 

 upper lvs. linear, fascicled; hds. small, very numerous, 5-flowered; scales 10, 

 with soarious margins and cuspidate points. — In dry, thin soils, N. Car., Ga. to 

 ffla., common. St. 3 to 5f high. Lvs. and fls. immensely numerous, as in No. 1. 

 Fls. white, about 2" long. Panicle often 2f long. Sept., Oct. — Distinct from 

 No. 1? 



3 E. pinnatifidum Ell. Pubescent ; lvs. laciniate-pinnatifid, segm. linear, toothed 

 or entire, the lower whorled in 43, middle opposite, upper alternate ; hds. smaJl, 

 numerous, 5 to 9-flowered| in a fastigiate corymb ; scales oblong, mucronata — • 

 Pine barrens. Car. to Fla. Height 3 to it Hds. about the size of No. 2, to which 

 this species is evidently related. 



4 E. ivffifolium L. St. terete, branched; lvs. opposite, lanceolate, tapering to 

 each end, subsessile, subserrate, 3-veined; hds. pedicellate, 15 to 20-flowered; 

 scales 20, imbricated, the outer gradually shorter, all erect, obtuse, with 3 to 5 dis- 

 Hnct sirice. — "Woods, near N. Orleans. Herb 3 to Sf high. Lvs. 2 to 3' long. 

 Florets light blue, in a few large, corymbed hds. Aug., Sept. 



5 E. purpiireum L. (not of Willd., Ph., nor DC.) St. solid, green, or sometimes 

 purplish, with a purple band at the joints about 1' wide ; lvs. feather-veined, in 

 whorls of 3s, 43 and 5s (rarely in 2s), ovate, smooth above, downy on the veins 

 beneath, coarsely serrate. — Dry woods and meadows, common. St. 3 to 6f high. 

 Lvs. large, thin, 8 to 10' by 4 to 5'. Corymb lax, pale purple, varying to whitish. 

 Aug., Sept. , (B. trifoliatum Darl.) 



/3. TEENIFOLIUM. • St. solid, slender, green, with a purple blush ; lvs. in 3a, 

 very thin, lanceolate.: — Mountain woods, etc. Height about 3f. 



6 E. maculdtum L. Purple Boneset. St. solid, striate, hispid or pubescent^ 

 greenidh and purple, with numerous glands and purple lines, the glands on the 

 stems and leaves give out an acrid effluvium in flowering time ; lvs. iripli-veined, 

 3 to 5 in a whorl, ovate. — ^Low grounds, TJ. S. and Can. Herb 4 to 6f high. 

 Lvs. petiolate, 6 to 7' by 3 to 4', usually pointed, strongly serrate. Fls. puiple. 

 Jl., Sept. (E. purpureum /9. Darl) 



;3. UBTIOIPOLIUM Barratt. Slender ; lvs. thin, much elongated, — ^height 4 to 5f. 



7 E. fistuldsuin Barratt. Teuitpet "Weed. St. Jisiulous, glabrous, glaucous- 

 purple, striate or fluted ; lvs. oblong-kmceolaie, in whorls of 5» or 6s, largest in the 

 middle of the stem, rather flnely glandular serrate, midveiu and veinlets livid- 

 purple ; corymb globous, with whorled peduncles. — A majestic herb, thickets, 

 XS. S.' and Can. Height 6 to 10^ hollow its whole length. Lvs. including the 1 

 petioles, 8'. by 2'. Corymb often If diam. It does not appear to posses the acrid 

 properties of E. maculatum. Jl. — Sept. (E. purpureum WiUd. in part /J. an- 

 gustifolium T. & Gr.) — Intermediate forms occur, rendering the distinctions of 

 this species and the two preceding numbers a grave question. 



8 E. Slbum L. Scabrous-pubescent ; lvs. oblong-lanceolate, strongly serrate, ses- 

 sile, rather acute, obscurely 3-veined ; corymb fastigiate ; hds. clustered, oblong, 

 6-flowered ; sca^s 8 to 14, lance-linear, tipped with a white, soarious acumination, 

 longer than the fls.; cyps. glandular. — Sandy soils, Penn.'to La. St. about 2f 

 high, corymbously divided above. Lvs. 2 to 3' by j to 1', upper ones entire and 

 alternate. Invol. concealing the fls., and with them copiously sprinkled with 

 resinous dots, whitish. Aug. — Oct. (E. glandulosum Its.) — A variety has the 

 leaves rather obtuse and crenate. (Tenn.) 



9 E. Ieuc61epis Torr. & 6r. Nearly glabrous ; st. simple ; lvs. linear-lanceolale, 

 obtuse, closely sessile, serrate, lower ones obscurely tripli-veined ; corymb fasti- 

 giate, canescent ; hds. 5-flowered ; scales 8 to 10, scaiioua and white at the sum- 

 mit, as long as the fls. — Sandy fields, N. J. to La> St. 2 to 3f high. Lvs. IJ to 

 to 2 J' by J to 5 ', glaucous-green bpth sides, divaricate with the stems, upper ones 



