2a6 UNIVERSITY OF MISSOURI STUDIES [S^S 



936. S. serotina Ait. Late golden rod. 

 Common in moist thickets and open woodlands. 

 Newfoundland to British Columbia; Florida to Texas 



and Oregon: naturalized in Europe. 



936a. S. serotina gigantea (Ait.) Gray. Giant golden 



ROD. 



With the preceding, but less frequent. 

 Range of the type. 



937. S. Canadensis L. Common golden rod. 

 Thickets and roadsides; common and extremely variable, 



assuming especially scabrous and canescent forms. 



New Brunswick to Slave Lake and British Columbia; 

 Florida to Arizona: naturalized in Europe. 



937a. S. Canadensis procera (Ait.) T. & G. 

 Frequent in open places. 

 Range of the type. 



937b. S. Canadensis scabriuscula Porter [S. Caimdensis 

 scabra (Muhl.) T. & G.]. 



Common on dry sterile hills. 



New York and Michigan to Missouri; Florida to Texas; 

 Mexico. 



938. S. nemoralis Ait. Gray golden rod. 



Barrens; local. The plant is near 5. mollis Bartl.,but it is 

 taller and the panicle one-sided in full-grown plants. 



Quebec to the Northwest Territory; Florida to Texas 

 and Colorado. 



939. S. longipetiolata Mack. & Bush. Hoary golden 



ROD. 



Local on red clay barrens. 



Michigan to Wyoming; Missouri to Texas. 



940. S. radula Nutt. Harsh golden rod. 

 Local on cliffs and barrens. 



Illinois to Missouri; Louisiana to Texas. 



941. S. Drummondii T. & G. Cliff golden rod. 

 Abundant on limestone cliffs. 



Illinois to Missouri and Louisiana. 



