HITCHCOCK PLANTS OF AMES. IOWA. 503 



H. DIFFUSUS, Sims, Bot. Mag. 1818.— i/^. rigidus, Desf. Cat. Hort. 

 P.iris. 3d ed. 1829. 

 Prairies; frequent. 

 H. i..ETiFiiORUS, Pers. Syu. ii. 

 Prairie; infrequent. 



Along the railroad near the stone arch. 



H. GROSSE-SERRATUS, Martens, Sel. Sem. Hort. Lovan, 1839. 



Low ground; abundant. 

 H. STRUMOSUS, L. Spec. 



Borders of woods ; abundant. 

 Var. MOLLIS, (Willd.) Torr. & Gray, Fl. ii. p. 327.-7/. 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. TUBEROSUS, L. Spec. 



Open places ; abundant. 

 ACTiNGMERis ALTERNiFOLiA, (L.) DC. Prod. V. — Corcopsis cilter- 

 nifolta, L. Spec. — A. sqicarrosa, 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 College. 

 BiDENS 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 Sprenof. Neu. Entd. ii. 1821. 



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



Helenium autumxale, L. Spec. 



Low ground ; common. 

 Dysodia papposa, {Vent.)— Tag rtfs 2:>cipposa, Vent. Hort. Cels. 

 iSoo. — D. chrysanthemoides. Lag. Nov. 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 Cotula, L. Spec. 

 Roadsides; common. 



