

- 7 r> - 



lla. Beard of the lateral petals with a knob at the tip of each hair 



Blue Violet, Viola ciicnllata. 



lib. Beard of the lateral petals not knobbed 12. 



12a. Spurred petal hairy Wood Violet, Yiola affinis. 



12b. Spurred petal glabrous Blue Yiolet, Yiola papilionacea. 



13a. Spurred petal villous Blue Yiolet, Yiola septentrionalis. 



13b. Spurred petal glabrous, or with a few scattered hairs 



Common Blue Yiolet, Yiola sororia. 



14a. Leaf-blade obviously pubescent 15. 



14b. Leaf-blade glabrous or very nearly so 16. 



15a. Lateral petals bearded Sweet White Yiolet, Yiola incognita. 

 15b. Lateral petals not bearded White Yiolet, Yiola renifolia, 



16a. Leaf-blades strictly glabrous 



Sweet White Yiolet, Yiola palleiis. 



16b. Leaf-blades with some minute white hairs on the upper sur- 

 face near the base Sweet White Yiolet, Yiola blanda. 



17a. Stipules large and leaf-like, deeply pinnatifid and nearly or quite 



as long as the petioles 18. 

 17b. Stipules small, inconspicuous, entire or toothed, and much 



shorter than the petiole 19. 



18a. Leaves serrate; flowers 1.5 2.5 cm. wide (1 3 dm. high; 

 flowers of various colors) Pansy, Yiola tricolor. 



18b. Upper leaves entire or nearly so; flowers about 1 cm. wide 

 (1 2 dm. high; flowers bluish-white) 



Wild Pansy, Yiola rafinesquii. 



19a. Petals yellow (14 dm. high) (Yellow Violet) 20. 

 19b. Petals violet, blue, or white 21. 



20a. Foliage villous-pubescent Yellow Yiolet, Yiola pubescens. 

 20b. Foliage nearly or quite glabrous 



Yellow Violet, Yiola scabriuscula. 



21a. Stipules entire (24 dm. high) Canada Yiolet, Viola canadensis. 



21b. Stipules toothed 22. 



22a. Lateral petals not bearded (12 dm. high) 



Long- spurred Violet, Viola rostrata. 



22b. Lateral petals bearded 23. 



23a. Flowers white or nearly white (1 3 dm. high) 



Pale Yiolet, Viola striata. 

 23b. Flowers blue (about 1 dm. high) 24. 



24a. Leaves smooth Dog Violet, Viola conspersa. 



24b. Leaves pubescent Sand Yiolet, Viola a mi aria. 



