186 COMPOSITE, (composite familt.) 



5. KIJHIVIA, L. KuHNiA. 



Heads 10-25-flowered : flowers perfect. Scales of the involucre few and 

 loosely imbricated, lanceolate. Corolla slender, 5-toothed. Achenia cylindrical, 

 many-striate. Pappus a single row of very plumose (white) bristles. — A peren- 

 nial herb, resinous-dotted, with mostly alternate lanceolate leaves, and panicu- 

 late-corymbose heads of cream-colored flowers. (Dedicated to Dr. Kuhn, o. 

 I'ennsylvania, who brought the living plant to Linnaeus.) 



1. K. eupatorioldes, L. Leaves varying from broadly lanceolate and 

 toothed, to linear and entire. — Dry soil. New Jersey to Wisconsin and south- 

 ward. Sept. 



6. ElJPATORItTM, Tonrn. Thoeoushwokt. 



Heads 3 - many-flowered : flowers perfect. Involucre cylindrical or bell- 

 shapei Receptacle flat. Corolla 5-toothed. Achenia 5-angled. Pappus a 

 single row of slender capillary barely roughish bristles. — Perennial herbs, often 

 sprinkled with .bitter resinous dots, with generally corymbose heads of white, 

 bluish, or purple blossoms, appearing near the close of summer. (Dedicated to 

 Eupator Mithridates, who is said to have used a species of the genus in medicine.) 

 * Heads cylindrical, 5-lOJlowej-ed ; the purplish scales nuTiieivuSj closdy imbricated 



in several rows, of unequal length, sliijhthj striate ; stout herbs, mtk ample mostly 



whoi'led leaves, and Jiesh-colored flowers. 



1. E. puriturenin, L. (Joe-Pye Weed. Tkumi-et-Weed.) Stems 

 tall and stout, simple ; leaves 3 - 6 in a whorl, oblong-ovate or lanceolate, point- 

 ed, very veiny, roughish, toothed ; corymbs very dense and compound. — Varies 

 greatly in size (2° -12° high), &c., and with spotted or unspotted, often dotted 

 stems, &c., — including many nominal species. — Low grounds, common. 



^ * Heads 3 - 20 flowered: involucre o/" 8 - 15 more or less imbricated and unequal 



scales, the outer ones shorter: flowers white. 

 ■*- Leaves all alternate, mostly dissected : heads panicled, very small, 3 - 5 flowered. 



2. E. foenicnlaceum, Willd. Smooth or nearly so, paniculately 

 much-branched (3° -10° high); leaves 1 - 2-pinnately parted, filiform. — Vir- 

 ginia, near the coast, and southward. 



I- -I- Leaves mostly opposite and sessile : heads 5 - Sflowered, corymbed. 



3. E. liyssopifdIiuEn, L. Minutely pubescent (l°-2° high); leaves 

 narrow, linear or lanceolate, elongated, obtuse, 1 - 3-nerved, entire, or the lower 

 sparingly toothed, offfin crowded in the axils or whorled, acute at the base ; scales 

 of the involucre obtuse. — Sterile soil, Massachusetts to Virginia, E. Kentucky 

 and southward. 



4. E. leucolepis, Torr. & Gr. Minutely pubescent, simple (l°-2° 

 high) ; leaves linear-lanceolate, closely sessile, l-nirved, obtuse, serrate, rough both 

 sides ; corymb hoary ; scales of the involucre with while and scarious acute tips. — 

 Sandy bogs. Long Island, New Jersey, and southward. 



5. £. parvifloruin, Ell. Minutely velvety-pubescent, branching (2°- 

 3° high) ; leaves lanceolate or oblong, triple-ribbed and veiny, sen'ate above the 



