COMPOSITAE (THISTLE FAMILY) 



13 a Lower and basal leaves lanceolate to oblong-lanceolate 



BOG GOLDEN-ROD. (S. uliginosa.) 

 b Lower and basal leaves oval to ovate, the margins 



rough SHOWY GOLDEN-ROD. (S. speciosa.) 



14 a Lower and basal leaves entire 15 



b Lower and basal leaves more or less sharply toothed 16 



15 a Irregular flowers 8-10; basal leaves long-petioled ; plant 



growing on salt marshes 



SEA-SIDE GOLDEN-ROD. (S. sempervirens.) 

 b Irregular flowers 3-4; basal leaves sessile or short- 

 petioled ; plant not growing on salt marshes 



SWEET GOLDEN-ROD. (S. odbra.) 



16 a Lower leaves more or less distinctly 3-nerved 17 



b Lower leaves pinnately veined, not 3-nerved 19 



17 a Plant hairy CUT-LEAVED GOLDEN-ROD. (S. serotina.) 



b Plants not distinctly hairy 18 



1 8 a Lower leaves narrowly lanceolate 



CANADA GOLDEN-ROD. (S. canadensis.) 

 b Lower leaves oblanceolate 



GRAY GOLDEN-ROD. (S. nemoralis.) 



19 a Basal leaves similar to the 30-200 stem leaves, sessile 



or short-petioled 20 



b Basal leaves long-petioled, conspicuously larger than 



the 10-20 stem leaves 21 



20 a Lower leaves coarsely and sharply toothed ; achenes 



usually not hairy. ELM-LEAVED GOLDEN-ROD. (S. nlmifblia.) 

 b Lower leaves sparingly toothed; achenes hairy 



ELLIOTT'S GOLDEN-ROD. (S. elliottii.) 



21 a Lower leaves broadly ovate or ovate-lanceolate, abruptly 



narrowed to a margined petiole; upper leaves usually 



toothed TOOTHED GOLDEN-ROD. (S. arguta.) 



b Lower leaves lanceolate to oblong-lanceolate, gradually 



narrowed into a petiole; upper leaves usually entire 22 



22 a Irregular flowers 7-12; panicle usually, not always, as 



broad as high; basal leaves lanceolate to ovate-lanceo- 

 late EARLY GOLDEN-ROD. (S. juncea.) 



b Irregular flowers 1-8 ; panicle usually longer than 



broad; basal leaves lanceolate to oblong-lanceolate.. 23 



23 a Irregular flowers 1-4; upper leaves linear to lanceolate; 



panicle comparatively small 



FEW-RAYED GOLDEN-ROD. (S. unillgulhta.) 

 b Irregular flowers 3-8; upper leaves lanceolate 



SWAMP GOLDEN-ROD. (S. neglecta.) 



229 



