224 coMrosiT.E, (composite family.) 



6. L. spic^ta, Willd. Smooth or somewhat hairy ; stems very leafy 

 (2°-;")° hiuh) ; liavcs linear, the lower 3-5-ncrved ; heads 8 - 1 2-fiowcred (i'- 

 ^' lonjr), erowdcd in a long spike ; scales of the rijlindricul-bell-shaped involncre 

 Mony or oval, olliiae, upprtssed, with sli(jht margins ; achenia jiubesceiit or smoothish. 



— Moi>t grounds : roniinon from S. New York to Wisconsin and southward. — 

 Involucre somewhat resinous, very smooth. 



7. L. graminif61ia, Wilid. Hairy or smoothish; stem (10-3° high) 

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

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

 spatulate or oblony, obtuse, or somewhat pointed, riyid, appres&ed ; 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 soutliward. 



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

 liigh), very Icafv ; leaves linear-lanceolate, the upper very narrowly linear; 

 spike thick and dense (G'-20' long) ; heads alwut ."i-flowercd (^' long) ; scales of 

 the cijliudrical involucre olilong or lanceolate, with recurved or sjn-eciditiy colored tips. 



— Prairies, from Indiana southward and westward. 



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

 icled, A - Id-flowered : involucre little imbricated: lobes of the corolla ovate: 

 pappus not plinnoxe. 



9. L. Odoratissima, Willd. (A^vxilla-plaxt.) Very smooth; leaves 

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



— Low j)ine barrens, Virginia and southward. — Leaves exhaling the odor of 

 Vanilla when bruised. 



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

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

 and southward. 



5. KUHNIA, L. KcuNiA. 



Heads 10-2.'j-flowcred : flowers perfect. Scales of the involucre few and 

 loosely imbricated, lanceolate. Corolla slender, 5-toothcd. 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 crenm-colorcd 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, Toum. TiioitouGinvoRX. 



Heads 3-many-flowcrod : 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 sjn-inklcd with bitter resinous dots, with generally co- 

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



