Eupatorium. COilPOSIT.E. 95 



coriaceovis, hardly striate, prominently appendaged by deltoid spreading foliaceous tips: 

 flowers probably purplish. — " California," Coulter, no. 294. But the same as 253 of Upper 

 Souora in the Mexican collection, doubtless the real habitat. Yet may reach into Arizona. 

 (Adj. Mex., Conker, Cregg, Palmer.) 



. E. ivsefolium, L. Herbaceous or merely suffrutescent, somewhat hirsute or pubescent, 

 strictly erect, •> to 5 feet high : leaves lanceolate or the upper ones linear, hardly petioled, 

 3-nerved, sparsely and often coarsely serrate at the middle, mostly obtuse, rougbish, an inch 

 or two long: lieads small (3 or 4 lines long), 10-20-flowered, in small and loo.se cymes: 

 bracts of the cylindraceous involucre oblong, striate, with the very short somewhat truncate 

 tips purple or greenish and slightly squarrose-spreading : flowers light purplish-blue or 

 reddish. — Amccn. Acad. ,-. 405, & Sjjec. ed. 2, 1174; Torr. &. Gray, Fl. ii. 81 ; Griseb. Fl. 

 \y. Ind. 359 ; Baicer in Fb Bras. 1. c. 290. (E. obsciirum, DC, & A', concinnnm, Hook. & Am., 

 ex Baker.) E. calocephalum, Xutt. in Trans. Am. Phil. Soc. n. ser. vii. 286. Liatris 

 oppositifoUa, Xutt. in Am. Jour. tSci. v. 299. — Old fields, &c.. Lower Mississippi, Louisiana, 

 and Texas ; the var. Liidoi-irianum, Torr. & Gray, 1. c, a form with less serrate leaves and 

 less squarrose involucre, the tips of the upper scales mostly petaloid and purple. (\V. Ind. 

 & Mex. to S. Br:izil. ) 



* * Involucral bracts wholly inappendiculate and appressed. 



E. heteroclinium, Griseb. Herbaceous, with somewhat ligneous base, 2 or 3 feet high, 

 rather strong-scented, pubescent : branches ascending : leaves rather short-petioled, ovate- 

 lanceolate witli cuneate or truncate base to deltoid, obtusely serrate, 3-nerved, about an inch 

 long: heads scattered, 5 or 6 lines long, 20-25-flowered, short-peduncled : involucre cylin- 

 draceous, glabrous, smooth and somewhat shining, pale; the bracts very obtuse, about 

 "•striate, more than usually deciduous: receptacle of the purple or bluisli flowers convex. — 

 Fl. Brit. W. Ind. 358. Conocliniiim. rigidum, Chapm. in Bot. Gazette, iii. 6, not DC. — Kevs 

 of S. Florida, Blodijetl, Chapman, Curtiss. (Jamaica.) 



E. conyzoides, V..ihl. shrubby, with herljaceous divergent flowering brandies, 4 to 10 

 feet higli, from villous-pubescent to glabrate : leaves slender-petioled, ovate-lanceolate, vary- 

 ing to o^'ate, acuminate, mostly cuneate at base, sparsely and acutely serrate or sometimes 

 entire, 3-nerved or triplinerved (larger 3 to 5 and smaller 1 or 2 inches long) : heads numer- 

 ous in the corymbiform open cymes, a third to half-inch long, 12-30-flowered : involucre 

 c}"lindraceous or cylindrical, glabrous ; the bracts 3-5-striate, rounded and somewhat green- 

 ish at the tip : receptacle of the pale blue or white flowers flat. — Symb. iii. 96 ; Schrank, 

 Hort. Monac. t. 85; Baker, 1. c. E. odoratum, L., in part. — Along the Eio Grande on the 

 IMexican border of Texas, Berlandier, Schott, Birjclow, &c. Mouths of the ^Mississippi, 

 Trccul. E. Sdbeaniiif, Buckley in Proc. Acad. Philad. 1861, 456. The form witli stouter 

 heads and firmer greenish-tipped involucral liracts, common in Mexico, &c. {E. floribundum, 

 HBK., E. diverr/ens. Less., E. Maximiliani, Schrader, E. conyzoides folio molli et incano, etc., 

 Pluk. t. 177, fig. 3), not the W. Indian form with more slender and pallid fewer-flowered 

 involucre, and innermost bracts often acute, which approaches E. odoratum. (Trop. 

 Amer.) 



§ 2. ErPATORlujr proper. Involucre various ; the bracts from thin-membra- 

 naceous or scarious to herbaceous, nerveless or few-nerved, mostly lax, either 

 imbricated or equal and nearly uniseriate : receptacle flat, not hairy. 



* Invobicre cylindrical and imbricate in the manner of § 1, but thin-membranaceous and some- 

 what scarious when dry, faintly 3-striate; heads very numerous, corynibifonn-cymose, mosily 

 5-10-flowered : leaves verticillate: stem herbaceous: herbage nearly destitute of resinous glob- 

 ules. —§ Verticdlata, DC. 



E. purplireum, L. (Joe-Pte 'Weed, Tbu^ipet TVeed.) From pubescent to nearly 

 glabrous : stems simple, 3 to 9 feet high, usually lineolate-punctate, often fistular : leaves com- 

 monly 3-6-nate, from oval-ovate to oblong-lanceolate, acuminate, coarsely serrate, reticulate- 

 veiny, the base narrowed into a short petiole : cymes polycephalous, compound-corymbose and 

 numerous: involucre (3 or 4 lines long) whitisli and flesh-colored : flowers dull flesh-color or 

 purple, rarely almost white. — Spec. ii. 838 (Corn. Canad. t. 72; Herm. Parad. t. 158; 

 Moris. Hist. vii. t. 18) ; Torr. & Gray, Fl. ii. 81. E. trifohatum, L. 1. c, jil. Gronov. Virg. 

 E. maculatum, L. Amoen. iv. 288, & Spec, ed, 2, 1174 ; Bart. Fl. Am. Sept. t. 102. E. verti- 



