Jones: Flora of Illinois, 152. Compositae 255 



23. Rays light blue (or pink), about 5 mm. long; 

 stem pubescent; leaves linear, entire, 2-5 mm. 

 wide, hirsutulous, cuspidate; heads numer- 

 ous; involucres 4-5 mm. high; moist ground, 

 rare. Sept. Chicago, Benke; Peoria, McDon- 

 ald, Brendel. [A. ericoides X novae-angliae] 

 X ^- arnethystinus Nutt. 



22. Bracts glabrous (or finely ciliolate), appressed; 

 heads larger. 

 25. Heads solitary at the ends of short leafy 

 branchlets arranged along the upper side of 

 wand-like branches. 

 26. Outer bracts and uppermost leaves mucron- 

 ate; leaves of the flowering branchlets ap- 

 pressed or ascending; rays white; road- 

 sides, fields, and open woods, common 

 throughout HI. Aug. -Oct. [A. ericoides 

 of auth., not L.; A. ericoides var. platy- 

 phyllus T. &: G.; A. ericoides var. villosus 

 T. & G.; A. pdosus var. platyphyllns (T. 



& G.) Blake; A. glabellus Nees} 



A. pilosus Willd. 



26. Bracts obtusish, the tips soft and thin; leaves 



of the flowering branchlets spreading; rays 

 pale purple or white; moist sandy soil, 



rare. Aug. -Sept. Bushy Aster 



A. dumosiis L. 



25. Heads paniculate or racemose. 



27. Heads large, 15-25 mm. in diameter; rays 



6-12 mm. long. 

 28. Leaves narrowly linear, entire, scabrous- 

 margined; rays white; wet ground and 

 in bogs, rare. Aug.-Sept. Lake Co., 

 Hill; Peoria, Brejidel [/I. junceus 



sensu auth., non Ait.] 



A. junciformis Rydb. 



28. Leaves lanceolate to linear-lanceolate. 

 29. Rays usually bluish purple; leaves 

 firm, thickish, rough; bracts acute; 

 moist soil, local. Sept. -Oct. [_A. 



praealtus Poir., nom. illegit.] 



A. salicifolitis Lam. 



29. Rays usually white; leaves thin, 

 smooth (except the margins) ; 

 bracts acuminate; moist ground, 

 especially along roads, local. Sept.- 

 Oct A. paniculatus Lam. 



