Botany of Illinois and Missouri. 119 



Ruellia strepens. Lin. 

 Hab. Banks of the Mississippi — May. 



Ruellia ciliosa. Pursh. 



Obs. Stem erect, hairy. Leaves sessile, ovate, with long 

 whitish hairs on the margin and nerves. Teeth of the calyx 

 about a third as long as the tube of the corolla. 



Hab. With the last. 



Buchnera Americana. Lin. 

 Hab. Prairies near St. Louis — July. 



Collinsia verna. Nutt. 

 Hab. Wet Prairies of Illinois and Indiana, frequent — 

 May. 



Gerardia tenuifolia. Vahl. 

 Hab. Banks of the Missouri near St. Charles — June. 



Gerardia quercifolia. Pursh.? 

 Obs. Leaves all sinuate-pinnatifid ; teeth of the calyx 

 longer and narrower than in the eastern specimens. 

 Hab. Prairies, St. Louis — July. 



Pedicularis gladiata. Mich. 

 Hab. Barrens near St. Louis — April. 



Pedicularis canadensis. Lin. 

 Hab. With the last, and also on sandy prairies in Illi- 

 nois — April. 



Mimulus ringens. Lin. 

 Hab. Inundated banks of the Mississippi, common — 

 June. 



Martynia proboscidea. Willd. 

 Hab. Rocky banks of the Mississippi at St. Louis. 



Euchroma coccinea. Nutt. 

 Hab. Wet prairies west of St. Louis, frequent — May. 



Orobanche uniflora. Lin. 

 Hab. Roots of trees on the banks of the Illinois, rare — 

 April. 



Pentstemon pubescens. Lin. 

 Hab. Prairies, St. Louis — April and May. 



