64 
541. H. mollis, Lam. 
Sandy soil, mainly in the Calumet Eegion and southeast; not rare. 
August — September. 
Occasionally found elsewhere. 
542. H. grosse-serratus, Martens. 
Dry prairies and fence-rows; not common. August — September. 
Heads often nearly 4 inches in diameter. A form with almost entire 
leaves has been noted at Riverside. 
543. H. giganteus, L. 
Wet woods and swamps; not rare. August — September. Mainly 
south. 
The number of rays varies from 12 to 22. 
544. H. giganteus, L., var ambiguus, T. & G. 
Rare. 
Near Stony Island, 1884. (B. P.) 
545. H. divaricatus, L. 
Barren places, chiefly south; frequent. July 20th — September. (B.) 
546. H. hirsutus, Raf. 
Dry soil; infrequent. July— August. (B.) 
Evanston. Riverside. Englewood. Desplaines. Along the canal 
near Summit. 
Rays usually 10 to 12. Rarely 1J inches long. 
547. H. strumosus, L. 
Banks of streams and swamps; common. August — September. (B.) 
548. H. strumosus, L., var. mollis, T. & G. 
Riverside, near the Desplaines river. Banks of the Calumet. Near 
Miller’s, Ind. ; rare. July 1884-’85-’87. Washington Heights, 
Hill . (B. P.) 
549. H. traeheliifolius, Willd. 
Hyde Park and south; not common, Babcock ! 
550. H. decapetalus, L. 
Banks of streams and low copses; common. August — September. 
Rays 9 to 15. 
551. H. tuberosus, L. Jerusalem Artichoke. 
H. doronicoides , in Manual, 5th Ed. 
South Chicago, University of Chicago Herb. Bottoms of Thorn 
Creek, near Glenwood, Hill. (B.) 
