COMPOSITAE. 



VOL. III. 



7. Eupatorium album L. White Thor- 

 ough wort. Fig. 4158. 



Eupatorium album L. Mant. 111. 1767. 

 Eupatorium glandulosum Michx. Fl. Bor. Am. 2 : 



98. 1803. 

 Eupatorium album subvenosum A. Gray, Syn. Fl. 



i : Part 2, 98. 1884. 



Pubescent with spreading hairs, branched 

 above, i-3 high. Leaves opposite, sessile or 

 nearly so, oblong or oblong-lanceolate, obtuse, 

 obtusish or the upper acute at the apex, nar- 

 rowed at the base, coarsely or rather finely ser- 

 rate, i '-4' long, i'-i' wide, rather thick, mi- 

 nutely scabrous above, more or less pubescent 

 beneath ; inflorescence cymose-paniculate ; heads 

 numerous, 4"-5" long, 5-7-flowered; involucre 

 narrow, its bracts bright white, linear, cuspi- 

 date, imbricated in 3-4 series, the outer short 

 and usually pubescent, the inner much longer, 

 glabrous and shining; flowers white. 



In sandy soil, Long Island to Florida, Ten- 

 nessee, Arkansas and Louisiana. Ascends to 3000 

 ft. in Virginia. Aug.-Sept. 



8. Eupatorium hyssopifolium L. Hyssop- 

 leaved Thorough wort. Fig. 4159. 



Eupatorium hyssopifolium L. Sp. PI. 836. 1753. 

 E. linearifolium Walt. Fl. Car. 199. 1788. 



Roughish-puberulent, densely corymbosely 

 branched above, bushy, i-2 high. Leaves linear, 

 opposite, and fascicled in the axils of the stem, 

 or on short axillary branches, entire or very 

 nearly so, i'-2' long, i"-2" wide, firm, obtuse at 

 the apex, narrowed at the base ; inflorescence 

 densely cymose-paniculate; heads 3"-4" long, 

 about 5-flowered ; involucre campanulate, its bracts 

 linear or linear-oblong, obtuse or truncate, some- 

 time apiculate, puberulent, imbricated in about 3 

 series, the outer shorter; flowers white. 



In dry fields, Massachusetts to Florida and Texas. 

 Justice-weed. Leaf-margins usually revolute. Aug.- 

 Sept. A plant from the coast of Maryland with 

 very narrow leaves, closely approaches Eupatorium 

 lecheaefolium Greene, from Florida. 



9. Eupatorium Torreyanum Short. Tor- 

 rey's Thorough wort. Fig. 4160. 



Eup-atorium Torreyanum Short, 2nd Suppl. Cat. PI. 



Ky. 5. 1836. 

 Eupatorium hyssopifolium var. laciniatum A. Gray, 



Syn. Fl. i : Part 2, 98. 1884. 



Rootstock tuberous-thickened ; stem usually 

 densely puberulent, mostly branched above, ii- 

 3 high. Leaves opposite, or sometimes in 3's, 

 commonly with short leafy branches in their 

 axils, often drooping, lanceolate, acute at the 

 apex, narrowed at the base, sessile, i'-3' long, 

 2"-6" wide, usually distinctly 3-nerved, distantly 

 serrate, the upper and those of the branches 

 much smaller, linear, entire ; inflorescence mostly 

 loose; heads about 3" high, generally S-flow- 

 ered ; bracts of the campanulate involucre linear- 

 oblong, obtuse, pubescent, or puberulent, imbri- 

 cated in about 3 series, the outer shorter; flow- 

 ers white. 



In dry soil, Pennsylvania to North Carolina, 

 Kentucky, Florida and Texas. July-Sept. 



