Genus 4-] 



THISTLE FAMILY, 



13. Eupatorium rotundifolium 1^. 



Round-leaved Thoroughwort. 

 Wild Hoarliound. (Fig. 3625.) 



E. yotundifoliuin L- Sp. PI. S37. 175,;. 



Rough-pubesceut, branched at the sum- 

 mit, i°-3° high. Leaves opposite, sessile, 

 broadly ovate, often as wide as long, acut- 

 ish or obtuse, truncate to subcordate at the 

 base, coarsely dentate-crenate, \'-i' long, 

 ascending; inflorescence cymose-panicu- 

 late; heads about 5-flo\vered, i"-'-," high; 

 involucrecampanulate, its bracts linear-ob- 

 long, acute, densely pubescent, imbricated 

 in about 3 rows, the outer shorter; flowers 

 white. 



In dry soil, southern New York to Florida, 

 Kentucky and Texas. Reported from Canada, 

 but doubtful. July-Sept. 



,«iirtiii«iiii«« 



15. Eupatorium perfoliatum L. 

 Common Thoroughwort. Bone- 

 set. Indian Sage. (Fig. 3627.) 



E. perfoliatum L. Sp. PI. 838. 1753. 



Pubescent, stout, branched above, 

 2°-5° high. Leaves opposite, or rarely 

 in 3's, connate-perfoliate, divaricate, 

 lanceolate, long-acuminate with a slen- 

 der apex, finely crenate-serrate, rugose 

 and pubescent beneath, 4'-S'long, i'- 

 ij'z'w'ide; heads crowded, io-i6-flow- 

 ered, 2"-3" high; involucrecampanu- 

 late, its bracts lanceolate, acutish, im- 

 bricated in 2 or 3 series, pubescent, 

 the outer shorter; flowers white, rarely 

 blue. 



In wet places, New Brunswick to IMani- 

 toba, Florida, Nebraska and Texas. 

 Called also Ague-weed, Cross-wort. 

 Wild Sage, Thorough-wax. July-.Sept. 

 Eupatorium perfoliatum truncatum ( Muhl. ) 



.\. Gray, -Syn. Fl. i: Part 2. 99. 1804. 

 Eupatorium truncatum Muhl.; Willd. 



Sp. PI. 3; 1751. 1804. 



Leaves separated and truncate, or somewhat 



14. Eupatorium pubescens Muhl. 

 Hairy Thoroughwort. (Fig. 3626.) 



E. pubescens Muhl.; Willd. Sp. PI. 3: 1755. 1804. 

 Eupatorium rotundifolium var. ovatuni Torn; 



DC. Prodr. 5: 17S. 1836. 



Puberulent or pubescent, branched above, 

 usually taller than the preceding species. 

 Leaves opposite, ovate, sessile, often twice as 

 long as wide, acute at the apex, rounded or 

 truncate at the base, coarsely dentate with 

 acute or acutish teeth, or the lower incised- 

 dentate; inflorescence cymose-paniculate, 

 sometimes 10' broad; heads 5-S-flowered, 

 2"-T," high; involucre campanulate, its 

 linear-oblong bracts in 2 or 3 series, the outer 

 shorter; flowers white. 



In dry soil, Massachusetts to Pennsylvania 

 West Virginia and Florida. Ascends to 3000 ft. 

 in Virginia. July-Sept. 



UMcJc 



rounded at the base. Occasional with the type. 



