172 NEW YORK STATE MUSEUM 



Leaves glabrous beneath and on the petioles n V. affinis 



Cleistogamous flowers on erect peduncles, their capsules green 

 Leaves broadly ovate, blunt at the apex; sepals obtuse 



Cleistogamous flowers ovoid; spurred petal villous 



12 V. nephrophylla 



Cleistogamous flowers long and slender, spurred petal glabrous 



13 V. cucullata 



Leaves lobed or the margins sharply incised or toothed toward the 

 subcordate or truncate base; spurred petal villous, lateral ones 

 with capillary beard 



Blade of the mature leaves ovate-oblong, ciliate, finely pubes- 

 cent; petioles short 14 V. fimbriatula 



Blade of the mature leaves lanceolate, usually smooth ; petioles 



long 15 V. sagittata 



Blade of the mature leaves broadly ovate or deltoid 



Margin coarsely toothed near the base; blades sometimes 



lobed 16 V. emarginata 



Margin sharply toothed toward the base and more or less 



pectinately incised 17 V. pectinata 



Blade of mature leaves primarily three-lobed or three-parted, 

 the segments two to three-cleft into linear or oblanceolate 



lobes 18 V. brittoniana 



Rootstock slender (or thicker and scaly with age) ; plants usually from 



stolons 

 Petals pale violet; leaves minutely hairy on the upper surface; spur 



large, 3 lines long 19 V. selkirkii 



Petals white, with dark purple lines on the lower three 



Cleistogamous capsules ovoid, usually purplish ; woodland plants 



Leaves reniform, lateral petals beardless; stolons short 



20 V. renifolia 

 Leaves broadly ovate, acute; lateral petals bearded; seeds 



obtuse at the base 21 V. incognita 



Leaves ovate, acute or acuminate; lateral petals beardless; 



seeds acute at base 22 V. b 1 a n d a 



Cleistogamous capsules ellipsoid; always green; peduncles erect; 

 bog and wet meadow species 



