The Flora of the Cayuga Lake Basin 303 



/. Leaves hairy or rarely glabrous, ciliate, often lobed or divided; spurred 

 petal glabrous or hairy. 

 g. Spurred petal villous; leaf blades deltoid-ovate, rather small; petioles 

 slender, slightly hairy above, 4. V. septentrionalis 



g. Spurred petal glabrous ; leaf blades more dilated, larger. 



/;. Leaves lobed or parted, rarely unlobed, scarcely bullate; petioles 



slender, densely villous to the base. 5. V. palmata 



h. Leaves unlobed, more bullate; petioles generally villous above, less 

 so toward the base, occasionally in shade entirely glabrous. 



6. V. sororia 

 d. Leaves ovate-oblong, truncate or subcordate at base, blunt at apex, short- 

 petioled, hairy. 7. V. sagittata, 



var. a: 'at a 

 c. Flowers yellow; style beakless. 8. V. rotundifolia 



b. Rootstocks slender, rarely wanting, 2-A mm. in diam. near the summit, 1-1.5 

 mm. in diam. farther back, often long and creeping. 

 c. Style clavate, beaked at summit in front; flowers of medium size or rather 

 small. 

 d. Spur one-half to two-thirds as long as the limb, subclavate; flowers light 

 blue, scentless (?); leaves with a deep basal sinus, the lobes converging 

 and often overlapping ; blades thin, coarsely and flatly crenate-serrate, 

 setose above, glabrous beneath. 9. V. Selkirkii 



d. Spur one-fourth as long as the limb or less, not clavate; flowers white, 

 sweet-scented; leaves with the basal sinus less deep, open; blades less 

 coarsely crenate, glabrous or hairy. 

 e. Leaves renif orm or ovate-reniform, usually pointed, generally dull ; pubes- 

 cence, if any, fine. 

 /. Leaves entirely glabrous, generally small, usually much exceeded by the 

 scapes ; upper petals broadly obovate, the lateral ones usually beardless. 



10. V. pollens 



f. Leaves more or less hairy, larger, rarely exceeded by the scapes; petals 

 and beard various. 

 g. Blades slightly fleshy, glabrous except for a few hairs above; petioles 

 and peduncles usually reddish, the former spreading; flowers rather 

 large; upper petals narrow, lateral ones beardless. 



11. V. blanda 



g. Blades thinner, more veiny; petioles and peduncles not reddish, the 

 former rather erect ; flowers smaller ; upper petals broad, lateral 

 ones bearded. 

 h. Leaves hairy below and on the petioles. 12. V. incognita 



h. Leaves hairy above, glabrous below and on the petioles. 



12a. V. incognita, 



var. Forbesii 

 e. Leaves orbicular-reniform, generally pointless, waxy-glossy, glabrous at 

 least above; pubescence, if present, coarse; lateral petals beardless. 



13. V. renifolia, 



var. Brainerdii 



c. Style scarcely enlarged above, hooked ; flowers large, sweet-scented, blue or 



white; (spurs rather short; leaves obtuse, usually velvety on both surfaces). 



14. V. odorata 

 a. Plants leafy-stemmed ; flowers axillary. 



b. Style not enlarged, or merely capitate; stipules entire or toothed. 



c. Style capitate, beakless, bearded near the summit; spur short; stipules nearly 

 or quite entire. 

 d. Petals yellow ; stipules ovate, subherbaceous ; leaves coarsely crenate. 

 e. Plant very pubescent ; root leaves usually wanting; cauline leaves strongly 

 veiny; stipules broadly ovate; capsules often woolly. 



15. V. pub esc ens 



