Eupatorium. COMPOSITE. 101 



or roundish, obtuse or acute, sparingly dentate, sometimes merely repand or entire, an inch 

 or two long, rather short -petioled : cymes small and rather compact, somewhat paniculate : 

 heads (4 or 5 lines long) 1 5-25-flowered : involucre hardly longer than the mature akenes; 

 its bracts about 15 in two series, nearly equal, lanceolate, rather firm, nearly nerveless: 

 corolla white or flesh-color. — Fl. i. 305 ; Torr. & Gray, Fl. ii. 91. E. Oreganum, Nutt. Trans. 

 Am. Phil. Soc. vii. 286. — Crevices of rocks, Washington Territory and Oregon east of the 

 Cascade Mountains, N. Nevada, and through the Sierra Nevada of California. 



Var. Arizonicum. Larger (2 feet high), more branching and floribund: leaves 

 sometimes 2j inches long. — E. ageratifolium, var. 1 herbaceum, Gray, H. Wright, ii. 74. 

 E. Berlandieri, Gray, Bot. Mex. Bound. 76, not DC. — Mountains of Arizona and New 

 Mexico : also California, Bridges. The opposite extreme from the plant of Oregon, which 

 has small and thinnish leaves, but not unlike plants from the Sierra Nevada. 

 B. incarnatlim, Walt. More or less pubescent : stems 2 or 3 feet long, slender and weak, 

 loosely or diffusely branched : leaves thin, deltoid, or ovate-lanceolate with broad truncate or 

 cordate base, tapering to a mostly acuminate apex, coarsely crenate or serrate (an inch or 

 two long), veiny, slender-petioled : cymes small and lax: heads (2 or 3 lines long) about 

 20-flowered : involucre nearly equalling the pale purple or sometimes white corolla ; its 

 bracts unequal, narrow, thin and 2-nerved when dry, the inner linear, a few external ones 

 much shorter. — Car. 200 ; Ell. Sk. ii. 306 ; DC. Prodr. v. 175 ; Torr. & Gray, 1. c. — N. Caro- 

 lina to Florida, Louisiana, and Texas. (Adj. Mex.) 



++ ++ Lobes of the pure white corolla more or less bearded outside in the bud, sometimes very 

 sparsely and minutely so, or the beard fugacious: heads 15-30- or sometimes 8-14-flowered, 

 cymose. 



= Involucre 2 or 3 lines long, rather narrow; the linear bracts nearly equal, green externally and 

 nerveless when fresh, but more or less 2-nerved when dried : cymes corymbiform and naked, 

 usually ample. 



B. ageratoides, L. f. Nearly glabrous, sometimes pubescent : stems 1 to 3 feet high, 

 branching above : leaves bright green, membranaceous, long-petioled, ovate, with truncate 

 or subcordate or broadly cuneate base, acuminate, coarsely and rather sharply dentate- 

 serrate, conspicuously veiny, 3 to 5 inches long : cymes ample, corymbose-cymose. — Suppl. 

 355; DC. Prodr. v. 175; Torr. & Gray, Fl. ii. 89. E. urticcefolium, Reich. Syst. iii. 719; 

 Michx. Fl. ii. 100, not L. f. E. ahissimum, L. Syst. Veg. 614. E. odoratum ? Walt. Car. 

 200 ? E. Fraseri, Poir. Suppl. ii. 600 (Lam. 111. t. 672, fig. 4). Ageratum ahissimum, L. Spec. 

 ii. 839 (Corn. Canad. t. 21 ; Moris. Syst. sect. 7, t. 18, f. 11). — Moist woodlands and rich 

 soil, Canada to Minnesota, Arkansas, Georgia, and Louisiana. A state with viscid-villous 

 stem and petioles, Bedford Co., Virginia, Curtiss. 



Var. angustatum. Smaller, slender: leaves from ovate-lanceolate to broadly lan- 

 ceolate, much acuminate, coarsely serrate with only 3 to 6 teeth on each margin, commonly 

 cuneate at base : cymes looser: heads only 8-12-flowered. — W. Louisiana, Hale. Texas, 

 Wright, Lindheimer. 

 B. aromaticum, L. Herbage not aromatic, minutely puberulent : stems more simple, a 

 foot or two high : leaves dull green, thicker, mostly short-petioled, ovate, often subcordate, 

 acutish or obtuse, crenate-serrate, 1 J to 3 inches long : cymes simpler. — Spec. ii. 839, fide 

 herb. & syn. Pluk. & Gronov. ; DC. 1. c. ; Torr. & Gray, 1. c. E. cm-datum, Walt. Car. 199 1 

 E. ceanothifolium, Muhl. in Willd. Spec. iii. 1755; Ell. Sk. ii. 303; DC. 1. c — Dry woods 

 and pine barrens, mostly in sterile soil, coast of Massachusetts to Florida. Passes on the 

 one hand almost into the preceding ; on the other, into 



Var. melissoid.es. Slender, roughish-puberulent, strict, somewhat paniculately 

 cymose at summit : heads 5-12-flowered : leaves subcordate-ovate or oblong, f to 2 inches 

 long, obtuse, crenulate-dentate or with few coarser teeth, very short-petioled or even sub- 

 sessile, somewhat scabrous, most of them much shorter than the internodes. — E. melissoides, 

 Willd. 1. c. E. cordiforme, Poir. Suppl. ii. 600. E. cordatum, DC. 1. c, & var. Fraseri. — 

 Sterile soil, Penn. ? to Florida and Louisiana. 



Var. incisum. An insufficiently known plant, with the straggling habit and glabrous 

 involucre of E. incarnatum; probably a form either of this or the preceding species: leaves 

 slender-petioled, thickish, coarsely or laciniately dentate, broadly cuneate at base, consid- 

 erably like those of E. ceelestinum, var. salinum, Griseb. : "flowers very fragrant." — E. sua- 

 veolens, Chapm. Bot. Gazette, iii. 5, not of IIBK. — Manatee, &c, S. Florida, Chapman. 



