VIOLACEAE 215 



6. Lechea intennedia Leggett. Large-podded Pin-weed. (Man. 

 p. 633 ; I. F. /. 2481.) In dry open places, N. B. and Ont. to Pa. and 

 N. J. — Pennsylvania : Monroe ; Northampton ; Lehigh ; Hunting- 

 don. 



Famii,y 4. VIOLACEAE DC. Vioi,ET Famhy. 



Sepals more or less auricled at the base. i. Viola. 



Sepals not auricled at the base. 2. Cueelium. 



1. VIOLA L. 



A. Plants aculescent : flowers terminating basal scapes. 

 Plants not stoloniferous. 

 Leaf-blades mostly lobed or parted. 

 Petals not bearded ; cleistogamous flowers wanting. 



I. y. pedaia. 

 Petals bearded : cleistogamous flowers present. 

 Plants with markedly pubescent foliage. 2. V. palmata. 



Plants glabrous or essentially so. 3. V. Brtlioniana. 



Leaf-blades merely toothed, sometimes incised at the base, not lobed. 

 Leaf -blades ovate, orbicular or reniform, merely toothed. 

 Peduncles of the cleistogamous flowers horizontal or decumbent : 

 species of woodlands. 

 Leaf-blades membranous, cordate-ovate, attenuate at the apex. 

 Corolla deep blue : cleistogamous flowers on deflexed peduncles. 



4. V. obliqua. 

 Corolla pale blue : cleistogamous flowers on horizontal peduncles. 



5. V. sororia. 

 Leaf-b]ades thick, reniform to ovate, obtuse or merely acute at the 



apex. 

 Petals dark violet purple, narrow. 

 Cleistogamous flowers few, on deflexed peduncles : leaf-blades 



mostly less than 10 cm. broad. 6. V. papilionacea. 



Cleistogamous flowers numerous, on horizontal peduncles ; leaf- 

 blades mostly over 10 cm. broad. 7. V. domestica. 

 Petals reddish purple, suborbicular. 8. V. villosa. 

 Peduncles of the cleistogamous flowers erect ; species of meadows or 

 swamps. 9. V. cucullata. 

 Leaf-blades lanceolate to ovate-lanceolate or ovate, often incised at the 

 base. 

 Leaves overtopping the scapes. 

 Petals scarcely or not at all notched. 

 Leaf -blades sagittate-lanceolate. 

 Leaf-blades oblong-triangular. 

 Petals usually notched. 

 Leaves shorter than the scapes. 

 Plants stoloniferous. 

 Corolla deep violet purple or sometimes white : naturalized species. 



14. V. odorala. 

 Corolla pale purple, violet-blue, yellow or white : native species. 

 Corolla yellow. ' 15. V. rotundifolia. 



Corolla violet-blue or white. 

 Corolla violet-blue. 16. V. Selkirkii. 



Corolla white. 



