450 



SYNGENESIA [Eupatoriacs* 



the lower ones on short petioles, those above sessile. Heads of flowers in a rather 

 large panicle consisting of numerous corymbose clusters; involucre eylindric 

 pubescent, containing about 8 or 10 florets, the outer leaflets lanceolate, shorter 

 the inner ones linear, obtuse, mucronatc,3 nerved, 1 fourth to 1 third longer than 

 the akenes. Florets pale yellow, or ochrolcucous. Stamens and style included. 

 anthers distinct. Akenes about 3 lines lone, nearly eylindric, finely striate pu- 

 bescent, corneous at base, with the areola sul>-lateral ; pappus plumose, white or 

 often becoming tawny, about as long as the akene. 



Hob, Great Valley, near Brooke's Mill: not common. F1. August. Fr. Sept. 



Obs. Collected in 1832, by Mr. Giio. W. Hall. One or two additional species 

 have been found in the South. 



371. EUPATORIUM. L % Jftf*. Gen. 64 2. 

 [From Fupator, king of Pontus ; who, it is said, first used the plant.] 



Heads few- or many- ( but not 4- ) flowered. Involucre of few or 

 many series (rarely simple), oblong. Corolla with the limb not distinct 

 from the tube. Pappus in a single series, not plumose. Akenes 

 mostly 5-angled, not beaked. Receptacle naked* 



A. Leaves opposite, f Florets -white. 

 * Involucre 3 — 5-Jlowered. 



1. E. noTtrxDTFOLiuM, L. Leaves roundish-ovate, subcordate at 

 base, crenate-serrate, sessile, scabrous above, pubescent beneath ; invo* 

 lucre about 5-flowered, the inner leaflets acuminate. Beck, Rot. p. 196. 

 Round-leaved Eupatorium* Vulgo — Wild Hore-hound. 



Root perennial. Stem about 2 feet high, slender, rough ish-pube scent, corya>- 

 bote at summit. Leaves 1 to near 2 laches long, and 3 fourths of an inch to aa 

 inch and half wide, sessile, roundish-ovate, rather acute, subcordate or truncate 

 at base, 3-norved, resinous-punctate. Heads of flowers in a fastfgiate corymb i 

 involucre very pubescent ; outer leaflets lanceolate, shorter, inner ones lance-lin- 

 ear, abruptly acute, or acuminate. Florets white. Style much longer than the 

 corolla. Akenes oblon?, 5-angled, dark brown, sprinkled (as in many of the spe 

 cies) with resinous particles ; pajipm scabrous, longer than the corolla, white. 

 nab. Woodlands ; Mica-slate hills : not common. Fl. August. Fr. Sept. 



Obs. Collected by D. Townsbnd, Esq. in 1830. The infusion of this is bitter, 

 and is used as a febrifuge, in the South ; but is not .equal to that of E. perfoli- 

 atum. 



2. E. ▼xrbevkfoiium', Mx. Leaves ovate-oblong and lance-ovate, 

 mostly acute, coarsely and irregularly incised-dentate, roughish-pubes- 

 cent, sessile ; involucre 5-flowered, the inner leaflets lance-oblong, not 

 acuminate. Beck, Bot. p. 196. 



E. teucrifolium. Willd. Sp. 3. p. 1753. Pers. Syn. 2./>.399. Pursh % 

 Am. 2. p. 513. Jfutt. Gen. 2. p. 135. Torr. Comp. p. 284. Lindl. 

 Ency. p. 688. Also] Muhl. Catal. p. 71. Bart. Phil. 2. p. 99. 

 Also ? E. pubescens. Pers. Syn. 2. p. 400. Not? of Willd. Muhl. 

 Ell. Ac. 



Verbena-leaved Eupatobium. 



Root perennial. Stem 2 to 3 feet hish, striate, ronehish-pubescent, corymbose!/ 

 branched at summit. Leaves 2 to 4 inches long, and 3 fourths of an inch to an 



