COMPOSITAE 617 



N. J. Gloucester, Camden, Ocean and Monmouth counties, north 

 and west of the pine-barrens, thence increasing but not common 

 northward. 



Pa. Luzerne, Northampton, Bucks and Chester counties, prob- 

 ably in the intervening territory. 

 Tertiary, o: Cretaceous, rare: Older Formations, increasing 



northward. 117-220 days. Sea level-3,800 ft. 



19. Ionactis Greene. 

 1. I. linariifolius (L.) Greene. In dry, rocky or sandy soil: Newf. 

 to Que. and Fla., west to Minn., Mo. and Tex. 

 Throughout the range, locally rare. 



20. Baccharis L. 

 1. B. halimifolia L. Along salt marshes and up tidal streams, 

 . sometimes beyond influence of tides: Mass. to Fla. and 

 Tex. 



Common throughout our coastal marshes, extending up the tidal 

 rivers; Piermont-on-the-Hudson. 



B. Douglasii DC. has been reported as a waif. 



Tribe 4. Inuleae 



Heads small, rays none; flowers white or whitish. 



Receptacle chaffy. 21. Gifola. 



Receptacle naked. 



Plants dioecious or polygamo-dioecious. 



Bracts of the involucre not scarious; plants pubescent 



or glabrous, not woolly. 22. Pluchea. 



Bracts of the involucre scarious, mostly white or pink. 

 Pappus-bristles of staminate flowers thickened 



above. 23. Antennaria. 



Pappus bristles not thickened; stem leafy. 24. Anaphalis. 



Plants not dioecious; flowers all fertile. 25. Gnaphalium. 



Heads large, rays yellow. 26. Inula. 



21. Gifola Cass. 

 1. G. germanica (L.) Dumort. In dry fields: southern N. Y. to 

 Pa. and N. Car. Native of Europe. 



Very rare as a scarcely persistent waif near New York and south- 

 ward . 



22. Pluchea Cass. 



Perennial; leaves sessile, cordate, or clasping at the base. 1. P. foetida. 



Annual; leaves, at least those of the stem, petioled. 2. P. camphorata. 



