HITCHCOCK — PLANTS OF AMES, IOWA. 503 



H. DIPFUSUS, Sims, Bot. Mag. ISIS.— II. rigidus, Desf. Cat. Hort. 

 Paris. 3d ed. 1S29. 

 Prairies; frequent. 

 H. l.etiflorus, Pers. Syn. ii. 

 Prairie; infrequent. 



Along the railroad near the stone arch. 



H. grosse-serratus, Martens, Sel. Sern. Hort. Lovan. 1839. 



Low ground ; abundant. 

 H. strumosus, L. Spec. 



Borders of woods ; abundant. 

 Var. mollis, (Willd.) Torr. & Gray, Fl. ii. p. 327.— II. mollis, 

 Willd. Spec. iii. 



Woods; infrequent. 



Leaves often somewhat cordate at base, softly pubescent beneath. 



H. tracheliifolius, Willd. Spec. iii. 



Borders of woods ; scarce. 

 H. TUBEB.OSUS, L. Spec. 



Open places; abundant. 

 ACTINOMERIS ALTERNIFOLIA, (L.) DC. Prod. V.— Cor'OpSis alt(V- 

 ni folia, L. Spec. — A. squarrosa, Nutt. Gen. 



Woods in low ground ; frequent. 

 Coreopsis palmata, Nutt. Gen. 



Prairie; abundant. 



Specimens sometimes occur with narrow, entire leaves. 



C. tripteris, L Spec. 



Upland woods; infrequent. 



Woods west of Nevada; Squaw creek 3 miles northwest of Co!. 



Bid ens frondosa, L. Spec. 



Moist ground ; common. 

 B. connata, Muhl. in Willd. Spec. iii. 



Wet places; common. 

 B. cernua, L. Spec. 



Wet places: common. 

 B. CHRYSANTHEMOIDES, Michx. Fl. ' 



Wet places; common. 

 B. Beckii, Torr. in Sprens:. Neu. Entd. ii. 1821. 



I observed a few plants in a pond north of Ames in 1SS3, but have no specimens. 



Helenium autumn ale, L. Spec. 



Low ground: common. 

 Dysodia papposa, (Vent.)— Tar/ <t<s papposa, Vent. Hort. Cels. 

 1S00. — D. chrysanthemoides, Lag. Xov. Gen. & Spec. 1S16. 

 Sterile soil ; frequent. 



The pappus consists of "scales dissected into bristles" instead of*' capillary bris- 

 tles," as it may at first appear. 



Anthemis CotuIjA, L. Spec. 

 Roadsides; common. 



