COMPOSITE. 



119 



small. Peat-bogs and wet places, Atl. Prov., westward and 

 northward. 



12. S. speeio'sa, Nutt., somewhat resembles the last, but 

 the leaves are oval or ovate, and the stem is taller and 

 stouter (3-6 feet). The rays, also, are larger. Copses, 

 Atl. Prov. 



13. S. jun'eea, Ait. (S. arguta, Torr. and Gray.) Whole 

 plant smooth, 1-4 feet high, rigid, branching above. Lower 

 leaves oval or elliptical-lanceolate, serrate with spreading 

 teeth, pointed, tapering into winged and ciliate petioles ; 

 upper ones lanceolate. Racemes very dense, naked, at 

 length elongated and recurved. Woods and banks. 



14. S. argu'ta, Ait. (S. Muhlenbergii, Torr. and Gray.) 

 Stem smooth, angled or furrowed. Leaves large and thin, 

 ovate ; the upper elliptical-lanceolate. Racemes much 

 shorter and looser than in No. 13, and the rays much 

 larger. Moist woods and thickets. 



15. S. rugO'sa, Mill. (S. altissima, Torr. and Gray.) 

 Stem rough-hairy, less than a foot high. Leaves ovate- 

 lanceolate or oblong, coarsely serrate, veiny, often rugose. 

 Racemes panicled, spreading. Borders of fields and copses. 



16. S. negleeta, Torr. and Gr. Stem smooth, 2-3 feet 

 high, stout. Leaves thickish, smooth both sides, the upper 

 oblong-lanceolate, nearly entire, the lower ovate-lanceolate 

 or oblong, sharply serrate, tapering into a petiole. Heads 

 rather large. Racemes short and dense, at first erect and 

 scarcely one-sided, at length spreading. Swamps. 



***** Racemes one-sided and recurved, and the leaves plainly 3-ribbed. 



17. S. nemora'lis, Ait. Stem minutely and closely 

 hoary-pubescent, simple or corymbed. Leaves more or less 

 hoary, obscurely serrate or entire ; the lower oblanceolate, 

 somewhat crenate, and tapering into a petiole. Racemes 

 numerous, dense, at length recurved, forming a large pani- 

 cle. Dry fields. 



18. S. Missouriensis, Nutt. Stem smooth. Leaves linear- 

 lanceolate, tapering to both ends, with rough margins, 

 Racemes densely crowded. Dry prairies, N.W. 



