ORDER 70. COMPOSITE. 159 



2 E. coroiiopilolium Willd. Much branched, pubescent; leaves mostly alternate 



(the lower opp.), twice pinuatifld, with lance-linear lobes and segm., the upper linear, 

 simple ; hds. 5-flowered, scales 10. Dry soils, S. 3 5f. Flowers white, 2". 



3 E. piimatifidnm Ell. Pubescent: Ivs. laciniate-pinnatifid, segm. linear, toothed 



or entire, the lower whorlcd in 4's, middle opp., tipper alteru. ; corymb fastigiate ; 

 hds. small, 00, 5-9-flowered ; scales oblong, mucronate. Pine woods, S. 3 if. 



4 E. ivselolium L. Lvs. opposite, lanceolate, tapering to each end, 3-veiued ; heads 



pedicellate, 15-20-flowered ; scales 20, imbricated, erect, obtuse, with 35 distinct 

 etr'ue. Woods, Miss, and Fla. 3 5f. Blue. 



5 E. purpiireum L. Stem solid, purple at the joints ; Ivs. feather-veined, in whorls 



of 3's 5's. thin, ovate to lanceolate, coarsely serrate. Dry. 3 6f. 



6 E. fistulosum Barratt. Tintmpet-iceed. Stem hollow, striate, glabrous, glaucous- 



purple; Ivs. lance-oblong, in 5's, (Ts, finely serrate ; corymb globous, with whorled 

 rays. Thickets. G lOf. Lvs. S'. Corymbs If. (E. purpureum. /3. T. & G.) 



7 E. maculatum L. Stem solid, marked with purple glands and lines ; leaves 3- 



veined. ovate, in 3's 5's. Low grounds: common. 3 5f. (E. purpureum. /3. Darl.) 



8 E. scabridum Ell. 1 (Chapm.) St. stout, tomentous ; Ivs. lance-ovate, acute, ser., 



3-veined from base ; scales lance-obi., cuspidate, edged, shorter than fls. Car. Fla. 2f. 



9 E. album L. Rough-downy; Ivs. lance-oblong, acutish ; hds. oblong, 5-llu\vered; 



scales white-scarious at the point, longer than the fls. Sands, N. J. and S. 2f. 



10 E. leucolepis T. & G. Nearly smooth ; Ivs. lance-linear, obtuse ; heads 5-flwd. ; 

 scales whitc-scarious at the tip, as long as the fls. Sands, L. I. and S. 2 3f. 



1 1 E. liyssopifolium L. Lvs. linear-lanceolate, 1 -3-veined, punctate, lower ones 

 subserrate, upper ones entire ; scales oval. Dry. Mass., W. and S. 2f. Hds. 3 // . 



1 2 E. parvlflorum Ell. Lvs. lanceolate, sessile, acutely serrate above, 3-veined ; 

 heads 2", crowded ; outer scales very short, inner linear. Damp. Va. to Fla. 2 3f. 



13 E. altisslmum L. Tall, downy; Ivs. lanceolate, few-toothed above, conspicu- 

 ously 3-veined ; scales 812, elliptical, 2*" ; fls. 5". Dry. Pa. to Car., and W. 3 7f. 



14 E. cunelfolium Willd. Downy; Ivs. small, glaucous, obovatc-oblong, 3-veined. 

 apex obtuse and subserrate ; scales oval, 2"; fls. V, Rich shades, S. Car. to Fla. 2f. 



1 5 E. teucrlfollum Willd. Rough-downy ; leaves sessile, ovate, veiny, the lowi r 

 doubly serr. : scales elliptical, faintly striate. rather acute. Damp. Mass, to La. 2 3f. 



16 E. sessilii'olium L. Smooth; leaves half-clasping, lance-ovate, serrate; inner 

 scales oblong-obovate, obtuse. Rocky woods, Mass, to Ind., and S. 2 if. Lvs. 3 5'. 



17 E. rotundifolium Willd. Hoarhoimd. Downy; Ivs. roundish ovate, eubcor 

 date, 3-veined, sessile, coarsely toothed ; inner scales acuminate, as long as the fls. Dry 

 fields, N. J. and S. A compact, bushy plant. 3f. 



1 8 E. mlkaiiioides Chapm. St. creeping at base, ascending ; Ivs. deltoid, truncate 

 at base, petioles subconnate ; scales lanceolate, acute. Isl. St. Vincent, Fla. 1 2f. 



19 E. pubescens Muhl. Hairy; Ivs. distinct, sessile, ovate, acute, blunt-toothed; 

 hds. about 8-flwd. ; scales lanceolate, acute, short. Dry. N. II. to N. J., and Ky. 3 4f. 



20 E. resinosum Torr. Viscid-resinous ; leaves distinct, closely sessile, lin.-lanceo- 

 late, long-pointed ; hds. 10-15-flwd. ; scales obtuse, white-downy. Barrens, N.J. 2-3f. 



21 E. pcrfoliitum L. Thorouglnvort. Eoneset. Hairy; Ivs. lanceolate, each paii 

 united at base around the stem ; heads about 12-flowered, in a large, dense corymb ; 

 scales lance-oblong, acute. Low grounds : common. 3 4f. A powerful tonic. 



22 E. serotiiium MX. Soft-puberulent ; Ivs. petiolate, lance-ovate, sharp-serrate. 3- 

 veined; hds. 12-15-flwd. ; scales 9 11, similar, very downy, obtuse. Md.,S. andW. 51'. 



23 E. ageratoides L. Smooth; Ivs. long-petiolate, ovate, acuminate, sharp-sen-., 

 3-veined; hds. 10-20-flwd.. in a compound corymb ; scales oblong, obtus*,. Woods. 31'. 



24 E. aromattcum L. Rough-downy; Ivs. petiolate, lance-ovate, acute. 3-veiut'd, 

 blunt-scrr. ; hds. 10-15-flwd., in small corymbs ; scales lance-linear. Low woods. 2f. 



25 E. incarnatum Walt. Diffusely branched ; leaves long-petioled, deltoid-ovate, 

 pointed, coarsely crenate-dentate ; hds. on slender ped., 15-20-flwd. ; scales lin. -subu- 

 late, 3-striate ; lobes of the corolla pale purplf. Damp ?oils, X. Car. to Fla. 3f. 



