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Pentstemoii albidus, Nutt. White Beard-tongue. 



On prairies from the Missouri valley eastward, and in 

 the Black Hills. 



Pentstemoii gracilis, Nutt. Slender Beard-tongue. 



Common on prairies from the Missouri valley east- 

 ward, and in the Black Hills. 



Peiitstemon grandiflorus, Nutt. Large Flowered Beard 

 tongue. 



On dry knolls and banks of ravines throughout the state. 



Peiitstemon glaber, Pursh. Smooth Beard-tongue. 



On low prairies from the Missouri valley westward. 



Pentstemon angustifolius, Pursh. Pale Beard-tongue. 

 Near Hot Springs in the Black Hills, rare. 



Pentstemoii Jamesii, Benth. James' Beard-tongue. 



On table-lands near Hot Springs in the Black Hills. 



Colliiisia parvtflora, Dougl. Small-flowered Collinsia. 

 On dry hill sides in the Black Hills. 



Mimulus ringens, L. Monkey Flower. 



Along streams in the Minnesota and Sioux valleys. 



Mimulus Jamesii, T. & G. James' Monkey Flower. 



In bogs and swamps in the Minnesota valley and in 

 the Black Hills. 



Mimulus luteus, L. Yellow Monkey Flower. 



In damp, shady ground in the Black Hills near Lead 

 City. 



Moimiera rotuiidifolia, Michx. Round-leaved Hedge 

 Hyssop. 



Herpestris rotundifolia, Pursh. 



In shallow pools and on muddy shores from the Mis- 

 souri valley eastward, and in the Black Hills. 



Ilysanthes gratioloides, (L.) Benth. False Pempernel. 

 Ilysanthes riparia, Raf: 



On muddy shores from the Missouri valley eastward. 



