172 NEW YORK STATE MUSEUM 



Leaves glabrous beneath and on the petioles 1 1 V. a f f i n i s 



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. n e p h r o p h y 1 1 a 

 Cleistogamous flowers long and slender, spurred petal glabrous 



13 V. c u c u 1 1 a t a 

 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. s a g i 1 1 a t a 



Blade of the mature leaves broadly ovate or deltoid 



Margin coarsely toothed near the base; blades sometimes 



lobed 16 V. em a r g i n a t a 



Margin sharply toothed toward the base and more or less 



pectinately incised 17 V. p e c t i n a t a 



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

 the segments two to three-cleft into linear or oblanceolate 



lobes 18 V. b r i 1 1 o n i a n a 



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. s e 1 k i r k i i 



Petals white, with dark purple lines on the lower three 



Cleistogamous capsules o^'oid, usually purplish; woodland plants 



Leaves reniform, lateral petals beardless; stolons short 



20 V. r e n i f o 1 i a 

 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 



