324 



Minnesota Plant Life. 



are herbs of the prairies and should be looked for particularly 

 in the far southwestern portions of the state. One of them 

 is occasionally found along railways as far east and north as 

 Minneapolis. The two varieties of Callirrhoe are distinguished 



FIG. 159. Basswood trees. Shore of L,ake Calhoun. After photograph by Hibbard. 



by the shape of their leaves. The triangular-leafed poppy- 

 mallow has the lower leaves somewhat halberd-shaped, while 

 the other puts forth deep-lobed round leaves. The flowers in 

 each of these varieties are rather large and showy, purple in 



