224 COMPOSITE. (composite family.) 



6. L. spicata, Willd. Smooth or somewhat hairy ; stems very leafy 

 (2° -5° high) ; leaves linear, the lower 3-5-nerved; heads 8- 12-flowered ($'- 

 £' long), crowded in a long spike ; scales of the cylindrical-bell-shaped involucre 

 oblong or oval, obtuse, oppressed, with slight margins; achenia pubescent or smoothish. 



— Moist grounds : common from S. New York to Wisconsin and southward. — 

 Involucre somewhat resinous, very smooth. 



7. L. graminifblia, Willd. Hairy or smoothish; stem (l°-3° high) 

 slender, leafy ; leaves linear, elongated, 1 -nerved ; heads several or numerous, 

 in a spike or raceme, 7 - 12-flowered ; scales of the obconical or obovoid involucre 

 spatulate or oblong, obtuse, or somewhat pointed, rigid, oppressed; achenia hairy. — 

 Virginia and southward. — Inflorescence sometimes panicled, especially in 



Var. dubia. Scales of the involucre narrower and less rigid, oblong, often 

 ciliate. ( L. dubia, Barton. ) — Wet pine barrens, New Jersey and southward. 



8. 1 L. pyenostachya, Michx. Hairy or smoothish ; stem stout (3° - 5° 

 high), very leafy; leaves linear-lanceolate, the upper very narrowly linear; 

 spike thick and dense (6' -20' long) ; heads about 5-flowered (^' long) ; scales of 

 the cylindrical involucre oblong or lanceolate, with recurved or spreading colored tips. 



— Prairies, from Indiana southward and westward. 



§ 2. Stem simple or branched above, not from a tuber : heads small, corymbed or pan- 

 icled, 4 - \0-flowered : involucre little imbricated: lobes of the corolla ovate: 

 pappus not plumose. 



9. L. odoratlSSima, Willd. (Vaxilla-plant.) Very smooth; leaves 

 pale, thickish, obovate-spatulate, or the upper oval and clasping ; heads corymbed. 



— Low pine barrens, Virginia and southward. — Leaves exhaling the odor of 

 Vanilla when bruised. 



10. L. paniculata, Willd. Viscid-hairy; leaves narrowly oblong or lan- 

 ceolate, smoothish, those of the stem partly clasping, heads panicled. — Virginia 

 and southward. 



5. KUHNIA, L. Kuhnia. 



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

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

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

 perennial herb, resinous-dotted, with mostly alternate lanceolate leaves, and 

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

 of Pennsylvania, who brought the living plant to Linnasus.) 



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

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

 ward. Sept. 



6. EUPATORIUM, Tourn. Thoroughwort. 



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

 shaped. Receptacle flat or barely convex. Corolla 5-toothed. Achenia 5- 

 anglcd. Pappus a single row of slender capillary barely roughish bristles. — 

 Perennial herbs, often sprinkled with bitter resinous dots, with generally co- 

 rymbose heads of white, bluish, or purple blossoms, appearing near the close of 



