Grindelia 



Compositae 



913 



5 50 



Map 1998 



Liatris spicata (L ) Willd 



Map 1999 

 Liatris scanosa Willd. 



o 55 



Map 2000 



Grindelia squarrosa (Pursh) Dunal 



years, he wrote a manuscript of about 500 pages in which he described 

 many species of this complex. In my collection of about 400 sheets I have 

 many type specimens and varieties which he proposed to publish. I was 

 told by a geneticist that he estimated this species contains at least 100 

 elemental species. It at once becomes evident that a detailed account of 

 this group would be out of place in a work of this kind. 



Infrequent to frequent or common in prairie habitats in northern In- 

 diana, in moist or dry, sandy soil in fallow fields, in open woods, in prairie 

 habitats, and along roads and railroads. In the southern part of the state 

 it is local and is found in dry, sandy clay soil on ridges or on open, wooded 

 slopes. 



This and the preceding species are easily cultivated and their inflores- 

 cences are commonly seen on the market. They prefer a sandy, well 

 drained soil. In the event that the corms are forced to the surface by 

 freezing during the winter they should be replanted in the spring, the 

 depth depending upon the soil. 



Maine to Man., southw. to Fla. and Tex. 



5a. Liatris scariosa f. Benkei Macbride. This is a white flowered form 

 reported from Lake County. I have specimens from Fulton and White 

 Counties. 



8833. GRINDfiLIA Willd. 



[Steyermark. Studies in Grindelia I. Ann. Missouri Bot. Gard. 21 : 

 227-30. 1934. Studies in Grindelia II. Ann. Missouri Bot. Gard. 21 : 433- 

 608. 1934.] 



Cauline leaves mostly 2-4 times longer than wide, ovate to broadly oblong 



1. G. squarrosa. 



Cauline leaves (4-4.5) 5-7 times longer than wide, linear-oblong, or oblong to lanceo- 

 late la. G. squarrosa var. serrulata. 



1. Grindelia squarrosa (Pursh) Dunal. Broadleaf Gumplant. Map 

 2000. This is a western species that is becoming established in Indiana as 



