Aster 



Compositae 



935 



~T0 



Map 2034 



Aster furcatus Burgess 



hairs not as stout as those in the preceding species; heads 



usually not clustered, mostly white, rarely colored. 



Involucre 5-7 mm high, hemispheric; inflorescence subcorym- 



bose, not crowded; heads large, spread of rays 15-25 mm, 



rays commonly 30 or more; lobes of disk flowers short, 



about 25% of the total length of the limb; leaves always 



linear; plants usually of a marsh habitat. .17. A. junceus. 



Involucre 3-5.5 mm high, turbinate; inflorescence paniculate, 



heads numerous, of medium size or smaller, spread of 



rays 10-20 mm; rays usually fewer than 30; lobes of disk 



flowers moderately deep, 40%-50% of the total length 



of the limb; leaves linear to lanceolate; plants of moist 



or dry habitats. 



Heads of medium size, spread of rays 12-20 mm; involucre 



(4) 4.5-5.5 mm high; rays 6-11 mm long. 



Leaves linear, 12 times as long as broad or longer 



18. A. paniculatus. 



Leaves lanceolate, less than 12 times as long as broad. 



18a. A. paniculatus var. simplex. 



Heads smaller, spread of rays 10-16 mm; involucre 3-4 



(4.5) mm high; rays 4.4-8.5 mm long 



19. A interior. 



1. Aster macrophyllus L. Bigleaf Aster. Map 2033. In our north- 

 ern counties, colonies of this aster are infrequently found in sandy or 

 gravelly soil on black and white oak slopes and in the dune area, at the base 

 of such slopes. In the southern part of the state, I have found large colonies 

 in three counties on black and white oak slopes. It is difficult to explain why 

 it has not been found in other of our southern counties since its habitat ap- 

 parently exists in many of them. 



The extreme variability of this species has given rise to the publica- 

 tion of several varieties, three of which have been reported from Indiana. 

 I have studied my specimens rather carefully and have had the species 

 under cultivation for years. I prefer to regard it as a polymorphic species. 



N. B. to Minn, and N. C. 



The following three varieties have been reported from Indiana : 



