HITCHCOCK PLANTS OF AMES, IOWA. 493 



Amphicarp.ka comosa, (L.) Riddell, Synops. 1835.— Glycine co- 

 ?nosa, L. Spec. — A. monoica, Ell. Journ. Acad. Phil. i. 1818. ? 

 Low copses; frequent. 



Cassia Cham^ecrtsta, L. Spec. 



Drv. sterile soil; frequent. 

 GYMNOCLADUS DIOICUS, (L.) Koch, Dendr. 1869-1873. — Guilandi?w 

 diorca, L. Spec. — Gymnocladus Canadensis, Lam. Diet. i. 



Low woods ; infrequent. 



Gleditschia triacanthos, L. Spec. 

 Lowland woods ; frequent. 



ROSACEA. 



Prunus Americana, Marsh. Arbust. 



Thickets; frequent. 

 P. Pennsylvania, L. f. Suppl. 1781. 



According to Prof. Budd, this is not uncommon in upland woods.. 

 P. Virginiana, L. Spec. 



Upland woods; frequent. 

 P. serotina, Ehr. Beitr. iii. 1789. 



Woods; frequent. 

 RUBUS OCCIDENTALIS, L. Spec. 



Upland woods; frequent. 

 R. villosa, Ait. Hort. Kew. 



Upland woods; frequent. 



Geum album, Gmel. Syst. ii. 1791. 

 Woods ; frequent. 



Watson's Index gives as synonyms of this : G. Canadense, Jacq. Hort. Vind. ii. 

 1772, [G. Canadense, Murr. in Coram. Soc. reg. sci. Goett. v. 1783? is G. strict um 

 Ait. Hon. Kew.] and G. Carolinianum , Walt. Fl. In the absence of sufficient 

 literature, I have retained G. album, as given in the N. Y. Catalogue and Britton 

 Fl. N.Jersey. 



G. Virginian um, L. Spec. 

 Low ground ; frequent. 



Fragaria Virginiana, Duch., var. Illinoensis, (Prince), Gray, 



Man. 5th ed. — F. Illinoensis, Prince (said to be in a seedsman's 

 catalogue). 



Moist prairie and banks; abundant. 

 POTENTILLA ARGUTA, Pursh, Fl. 



Prairie; abundant. 

 P. Norvegica, L. Spec. 



Low ground; abundant. 



Erect, simple, or branching above; leaves all 3-foliclate; petals al out the length 

 of the calyx. 



