Erigeron 



Compositae 



947 



50 



Map 2070 



Erigeron pusillus Nutt. 



clay soil on the borders of ponds, in low woodland and fallow fields, and 

 along roadsides. Most of my specimens are from low places in beech and 

 sweet gum woods in the southeastern part and from low, post oak, shingle, 

 and pin oak woods in the southwestern part. It has been reported from 

 several counties of northern Indiana, but I believe many or all of the re- 

 ports should be referred to some other species. I have seen the Porter 

 County specimen and it is Aster dumosus. 

 Maine to Ind., southw. to Va. 



31a. Aster vimineus var. subdumosus Wieg. In this variety, the heads 

 are solitary on the ends of long, slender, more uniformly bracted peduncles. 

 The leaves of the branches and branchlets are linear and acute. The rays 

 are somewhat more numerous, 17-30. A specimen of this variety was 

 found in an open, low, flat woods in Daviess County, where it was as- 

 sociated with other southern species. 



Ind., 111., Mo., and southw. to Ala. 



8901. ERfGERON L. Fleabane 



Heads small, generally about 5 mm wide; rays scarcely exceeding the disk. 

 Stems erect, mostly 3-20 dm high. 



Involucral bracts with attenuate, whitish tips; stems usually more or less densely 



pubescent 1. E. canadensis. 



Involucral bracts with minute, purple tips; stems glabrous or nearly so 



2. E. pusillus. 



Stems diffuse, mostly 1-3 dm high 3. E. divaricatus. 



Heads large, generally 1.5-3.5 cm broad; rays much exceeding the disk. 

 Leaves sessile and clasping; rays colored, bluish or pinkish. 



Stems simple; heads generally 2-7 (9), rarely solitary; bracts more or less glan- 

 dular; rays about 50, bluish purple, mostly about 1 mm wide; corollas 4.5-5.5 



mm long, about 1 mm wide 4. E. pulchellus. 



Stems branched above; heads generally 6-35, rarely more or fewer; bracts not 

 glandular, rarely with a trace of glands; rays generally 100-150, rose purple, 

 sometimes lighter, generally about 0.5 mm wide; corollas mostly 2.5-3 mm 



long, about 0.5 mm wide 5. E. philadelpkicus. 



Leaves sessile, not at all clasping; rays white, rarely tinged with purple. 



