114 Botany of Illinois and Missouri. 



Potentilla argentea. Lin. 

 Potentilla simplex. Mich. 

 Potentilla canadensis. Lin. 

 Potentilla norwegica. Lin. 

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



Potentilla supina. Lin. 



Obs. Stem decumbent, dichotomous, pubescent. Leaves 

 pinnate ; leafets three to five pairs, with a terminal one, 

 somewhat oval, incisely dentate, a little hairy. Peduncles 

 solitary, an inch or more in length, with a single flower. Pe- 

 tals about as long as the calyx. 



Hab. Inundated banks of the Mississippi at St. Louis 

 and also near Herculaneum — May — June. 



Fragaria virginiana. Lin. 

 Hab. On the prairies of Illinois and Missouri, frequent — 

 April. Fruit smaller than in more northern latitudes. 



POLYANDRIA. MONOGYNIA. 



Helianthemum canadense. Mich. 

 Hab. Sandy prairies near St. Louis — June. 



Meconopsis petiolata. De Cand. 

 Stylophorum petiolatum. Nutt. 

 Hab. Banks of creeks, Illinois and Indiana — May. 



Sanguinaria canadensis. Lin. 

 Hab. Banks of the Illinois river, from its mouth to Fort 

 Clark, frequent — March — April. 



Podophyllum peltatum. Lin. 

 Hab. Shady situations near St. Louis — April. 



POLYANDRIA. DI PENTAGYNIA. 



Delphinium tricome. Mich. 

 Obs. Stem ten to twelve inches high. Leaves five-part- 

 ed ; lobes three-cleft, linear. Spur a little longer than the 

 flower, which is bluish-white. 



Hab. Prairies near St. Louis and Fort Clark, on the Il- 

 linois — April. 



Aquilegia canadensis. Lin. 

 Hab. Rocky banks of the Mississippi and Illinois — April. 



