IOWA ACADEMY OF SCIENCES. 229 



324. M. oJ/lriiHi/ls (L.) Lam. Yellow Sweet-clover. 



Infrequent; streets of Estherville. Adventive 

 from Europe. 



Trifolium L. 



325. T. praicnse L. Red Clover. Roadsides; escaped 



fiom cultivation. 

 32(). T. hi/hridinti L. Alsike Clover. Rare; introduced 

 along road northeast of Armstrong, 1885. 



327. 7'. jrpens L. White Clover. A very common 



escape from cultivation. 



PSORALEA L. 



328. F. ar(joplnjlla Pursh. V^ery common on prairie 



slopes. Flowering freely, but rarely perfecting 



seed. 

 321). F. esculenta Pursh. Pomme de Prairie. Frequent 

 on high prairies. The large starchy roots were 

 used as an article of food by the Indians, and by 

 the French voyageurs. 



Amorpha L. 



330. A. fruflcosd L. False Indigo. A common shrub 



on prairies and in open woods. 

 831. A. )iaiia Nutt, {A. 7)iicroph)/ll(( Pursh.) Frequent 



on prairies. A pretty little shrub, somewhat 



resembling box. 



332. A. rauesre/is Pursh. Lead Plant. Shoestring. A 



very common little shrub on prairies and borders 

 of woods. 



KuHNisTERA Lam. 



333. K. ccDKlida (Willd.) Kuntze. [Fddlostenion Candi- 



das Michx.) White Prairie Clover. Common. 



334. K. purpurea (Vent.) Mac M. [Petalosfemon violaceus 



Michx.) Purple Prairie Clover. Very common 

 on prairies. 



ROBINIA L. 



335. R. pseudaracia L. Locust Tree. Rare, escaped 



from cultivation. 



