Jan., 1913.] The Videts of Ohio. 57 



Synopsis. 



Aerial Leafy Stems. 



1. Style capitate, beakless, bearded at the summit; petal 

 •spur, short; stipules entire; flowers, yellow or whitish, sometimes 

 tinged with violet. 



1. Viola canadensis. 



2. Viola scabriuscula. 



3. Viola pubescens. 



4. Viola hastata. 



2. Style slender, not capitate; spur at least twice as long as 

 broad; stipules somewhat herbaceous, f ringetoothed ; flowers 

 white, cream-colored or violet. 



5. Viola striata. 



6. Viola labradorica. 



7. Viola rostrata. 



3. Style much enlarged upward into a hollow globose struc- 

 ture with a wide orifice on lower side; stipules leaf -like, large 

 deeply cut or pinnatifid. 



8. Viola rafinesquii. 



9. Viola tricolor. 



Underground Stems. 



4. Rhizomes long and slender, usually producing runners or 

 stolons ; flowers yellow, white or violet ; style dilated upward in a 

 vertical plane, capitate with conical beak on the lower side. 



10. Viola odorata. 



11. Viola rotundifolia. 



12. Viola lecontiana. 



13. Viola blanda. 



14. Viola lanceolata. 



5. Rhizome fleshy and thick without runners; petals violet 

 blue to purple; style dilated upward in a vertical plane, capitate 

 with conical beak on the lower side. 



15. Viola obliqua. 



16. Viola papilionaceae. 



17. Viola hirsutula. 



18. Viola sororia. 



19. Viola palmata. 



Var. 1. Viola palmata dilatata. 



20. Viola pedatifida. 



21. Viola emarginata. 



22. Viola fimbriatula. 



23. Viola sagittata. 



6. Rhizome short, erect, not scaly; leaves divided; style 

 ■ clubshaped, beakless, obliquely concave at the summit; stigma 

 with a small protuberance near the center of the cavity. ^---■*T7r 



24. Viola pedata. /^S^'^'H/ V 



uj library'^ 



-^\ 



BRAR Y I 



