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 ( J'- 

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

 oblony or oval, obtuse, appressed, 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. dtlbia. Scales of the involucre narrower and less rigid, oblong, often 

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



8. L. pycnostachya, 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- \Q-flowered: involucre little imbricated: lobes of the corolla ovate: 

 pappus not plumose. 



9. L. odoratissima, Willd. (VANILLA-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 Linnaeus.) 



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 



