504 ' TIIAXS. ST. LOUIS ACAD. SCIKXCE. 



A. arvensis, L. Spec. 



•'Ames-Bessey." Specimen in I. A. C. herbarium. 

 Achillea millefoliuji, L. Spec. 



Prairie; common. 

 Chrysanthemum Leucanthemum, L. Spec. 



Plants occur occasionally on the Campus, along the railroad, and elsewhere, but 

 tlie species has not, so far as I know, become established. 



Tauacetum vulgare, L. Spec. 



Escaped along roadsides in a few localities. 



Artemisia caudata, Michx. Fl. 



Sandy soil; abundant along the sand-hills south of the Northwest 

 School. 

 A. DKACUNCULOiDES, Pursh, Fl. 



Prairie; not uncommon. 

 A. SERRATA, Nutt. Geu. 



Low ground; infrequent. 



Bottom-land in '-the forks" ; quite abundant on Clear creek about one mile west 

 of the College. 



A. LuDOViciANA, Nutt. iu Torr. & Gray, Fl. ii. p. 4:20. 



Prairie; common. 



Leaves incised, or entire (var. gnaphalodes) . 



A. BIENNIS, WiUd. Phytog. 1794. 



Dry and sterile ground: frequent. 



Senecio aureus, L. Spec. 



Marshy places; not uncommon. 

 Var. OBOVATUS, (Muhl.) Torr. & Gray, Fl.ii. p. 442. - »S'. obova- 

 ius, Muhl. in \V'illd. Spec. iii. 

 Wet prairie; infrequent. 

 Var. BALSAMiT.E, (Muhl.) Torr, & Gray, 1. c. — S. halsaniitce, 

 Muhl. 1. c. 



Rocky bluff's on Des Moines river at Boone. 



Cacalia tubebosa, Nutt. Gen. 



Wet prairie ; frequent. 

 Ebechtites hieracifolia, (L.) Raf. iu DC. Prod. \\.— S<n< do 



hieraci/olia, L. Spec. 



Moist places; not common. 

 Arctium Lappa, L. Spec. 



Neglected ground ; common. 

 Cnicus lanceolatus, (L.) Hoffm. Fl. Germ. iv. \i>i)A.— Carduus 

 lauceolatus, L. Spec. 

 Pastures; infrequent. 



Rather abundant in a pasture aljout one mile nortlieast of Ames; also west of 

 the College beyond the brick-kiln. 



