238 
IOWA ACADEMY OF SCIENCES. 
65*2. E. ramosus (Walt.) B. S. P. (£'. strigosus Muhl.) 
With the preceding. 
Leptilon. 
653. L. canadense (L.) Brit. {Erigeron canadensis Li) 
Abundant in fields and waste ground. 
654. L, divaricatum (Michx.) Raf. (E. divaricatus Michx.) 
Sandy ground; common, locally. 
Dcellingeria. 
655. D, umhellata (Mill.) Nees. {Aster umhellatus Mill.) 
Swampy ground; frequent. 
Antennaria. 
656. A. plantaginifolia (L.) Rich. Dry prairies; abun- 
dant. 
PoLYMNIA. 
657. P. canadensis L. Damp woods; scarce. 
SiLPHIUM. 
658. S.perfoliatumh. Along streams and in thickets; 
common. 
659. S. integrifolium Michx. Roadsides; infrequent. 
660. S. laciniaium L. Prairies; common. 
Parthenium. 
661. P. integrifolium L. Meadows; common. 
Heliopsis. 
662. H. scahra Dunal. Roadsides and thickets; abun- 
dant. 
Rudbeckia. 
663. P. triloba L. Woods and thickets; common. 
664. B, suhtomentosaPyrr^h. Along streams; infrequent. 
665. P. hirta L. Open woods and meadows; abundant. 
666. R. laciniata L. Damp ground along streams; com- 
mon. 
Ratibida. 
667. R. pinnata (Vent.) Barnh. {Lepachys pinnata T. 
& G.) Dry prairies and roadsides; abundant. 
668. P. columnaris (Sims) D. Don. (L. columnaris T. & 
G.) With the preceding, but rare. 
