COMPOSITAE 



591 



Leaves linear, crowded, usually eruire, 



obtuse. 

 Leaves lanceolate, sparingly dentate, 

 long-acuminate. 

 Leaves rounded, obtuse or truncate at the base. 

 Plant glabrous; leaves lanceolate, long- 

 acuminate. 

 Plants pubescent; leaves ovate or oblong, 

 acute or obtuse. 

 Leaves ovate-oblong to lanceolate, mostly 



rounded at the base, usually obtuse. 

 Leaves broadly ovate, crenate-dentate, 

 mostly truncate at the base, obtusish. 

 Leaves ovate, dentate, acute. 

 Leaver clapping or connate-perfoliate. 



Leaves connate-perfoliate; involucral bracts acute. 

 Leaves merely clasping; involucral bracts obtuse. 

 Involucral bracts in I or 2 scries, all equal or nearly so. 

 Flowers white; recptacle flat. 



Leaves thin, 5-12 cm. long, sharply dentate, 



acuminate. 

 Leaves thickish, 2-5 cm. long, blunt-toothed, 

 acute or obtusish. 

 Flowers blue or violet; receptacle conic. 



5. E. hyssopifolium. 



6. E. altissimum. 



7. E. sessilifolium. 



8. B. verbenaefolium. 



9. E. rotundifolium. 



10. E. pubescens. 



11. E. perjoliaium. 

 \2. B. resinosum. 



13. E. ageratoides. 



14. E. aromaticum. 



15. E. coelestinum. 



3- 



E. maculatum L. In moist soil: N. Eng. to Ky., Minn., B. 

 Col., Kan. and N. Mex. 



Throughout the range, except the N. J. pine-barrens, there 

 unknown, and not definitely known from the higher peaks of the 

 Catskills. An opposite-leaved form, amoenum, has been collected 

 in the area. 



E. trifoliatum L. In moist soil: N. B. to Man., Fla. and Tex. 



Throughout the range, except the pine barrens. The plant 



known as E. purpureum. L. does not seem to be specifically distinct. 



E. leucolepis T. & G. In moist places: Mass. to Fla., Ga. 

 and La. 



N. Y. Recorded from near Sag Harbor, L. I. many years ago, 



not since collected, and otherwise unknown in the area. 

 N. J. Common in the pine-barrens, decreasing southward and 



rare in Cape May Co.; a single station along the coast at Sher- 



burn's; otherwise unknown. 



More common on the Beacon Hill formation in N. J. than else- 

 where, but not confined to it. 



