90 BOTANY OF LA SAL,LE COUNTY. 



S. nemoralis. Grayish-hoary-hairy; panicle one- 

 sided. 



S. radula. Stem and leaves very rigid and rough, 

 G. Dry lands. 



S. rigida. Rough and some hoary, stout, leaf) 7 , 

 heads large. A fine plant. Dry lands. 



S. Ohioensis. Smooth, Blender, leafy; leaves entire, 

 sessile. Moist places. 



S. Riddellii. Leaves long, narrow, recurved; heads 

 large. A beautiful species becoming less com- 

 mon year by year. Wet lands. 



S. lanceolata. Rigid, rough, branching leaves, very 

 narrow, entire. Damp sandy lands. 



S. tenuifolia. Smooth leaves narrower than lance- 

 olata. 

 BOLTONIA. P. Branching, smooth, pale G. herbs. 



B. asteroides. Stems 2 to 8 ft. leaves lanceolate. 

 Along streams. B. glastifolia of 5th Kd. 



B. diffusa. Branches spreading; leaves lance- 

 linear. 



ASTER. Starworts, Asters. Mostly perennials; 

 flowering in autumn, disc yellow, rays W. B. P. 

 Root and stem leaves often differ v\ idely. 



A. corymbosus. Slender; leaves thin, ovaie, cor- 

 date with slender petioles. W., Woods. 



A. macrophyllus. Petioled margined; leaves thick. 



A. oblongifolins. Branched, rigid; leaves lance- 

 olate, mucronate, some clasping, thickish, a 

 little downy; ra} 7 s. V. P. 



A. Novae Angliae, Stout, hairy, 3 to 8 ft., leaves 

 entire, clasping, dark G. Rays V. P., Pi., P. 

 W. A handsome plant. 



A. sericeus. Slender; leaves silver-white, lance- 

 olate, small, P. 



A. azureus. Stem rough, branches, slender, rigid 



