75 



7a. Leaves on the basal shoots narrowly lanceolate 



Pinweed, Lecliea intermedia. 



7b. Leaves on the basal shoots oblong-elliptic, about twice as long 

 as wide Pinweed, Lechea racemulosa. 



Sa. Pubescence of spreading hairs Pinweed, Lechea villosa, 

 8b. Pubescence of appressed hairs Pinweed, Lecliea minor. 



VIOLACEAE, the Yiolet Family 



Herbs with simple, alternate or basal leaves, and conspicuous ir- 

 regular flowers with a spur (except in the first species) ; sepals, petals, 

 and stamens each 5; ovary 1-celled. 



la. Flowers regular or nearly so, greenish-white, axillary; erect plant 

 with leafy stem (3 5 dm. high; spring) 



Green Violet, Hybanthus concolor. 



Ib. Flowers irregular, blue, yellow, or white, conspicuous (Violet) 2. 



2a. Plant stemless, the flowers all on leafless stalks and the 



leaves all basal (spring or early summer) 3. 

 2b. Stems leafy (spring and summer) 17. 



3a. Petals yellow Eound-leayed Violet, Viola rotundifolia. 



3b. Petals blue, violet, or white 4. 



4a. Principal leaves at time of flowering deeply lobed 5. 



4b. Leaves oblong, ovate, or triangular, not narrowed to the 



petiole, and frequently sharply toothed or incised near the 



base 7. 

 4c. Leaves narrowly lanceolate, tapering to the base 



Violet, Viola lanceolata. 

 4d. Leaves heart-shape or kidney-shape, not lobed 8. 



5a. Lateral petals bearded 6. 



5b. Lateral petals not bearded Bird-foot Violet, Viola pedata. 



Ga. Leaves divided to the base into linear segments 



Bird-foot Violet, Viola pedatifida, 

 6b. Leaves irregularly divided into broader segments 



Hand-leaf Violet, Viola palmata. 



7a. Leaves ovate-oblong, pubescent Violet, Viola fimbriatula. 



7b. Leaves triangular-lanceolate, usually somewhat dilated at base, 



nearly or quite glabrous Violet, Viola sagittata. 



8a. Flowers violet or blue (rarely white-flowered plants are 

 found with the typical blue-flowered ones) (Blue Violets) 9. 



8b. Flowers white, the 3 lower petals marked with purple (White 

 Violets) 14. 



9a. Lateral petals bearded 10. 



9b. Lateral petals beardless Great- spurred Violet, Viola selkirkii. 



lOa. Foliage glabrous 11. 



lOb. Petioles and lower surface of leaves pubescent 13. 



