VIOLACEAE 215 



6. Lechea intermedia Leggett. Large-poddEd Pin-weed. (Man. 

 p. 633; I. F. /. 2^Si.) In dry open places, N. B. and Ont. to Pa. and 

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

 don. 



Family 4. VIOLACEAE DC. Violet Family. 



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



Sepals not auricled at the base. 2. Cubelium. 



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. V. pedaia. 

 Petals bearded : cleistogamous flowers present. 



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



Plants glabrous or essentiallj' so. 3. V. Brtttoniana. 



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. obliqtia. 

 Corolla pale blue : cleistogamous flowers on horizontal peduncles. 



5. V. sororia. 

 Leaf-blades 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. cucullala. 

 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. 10. V. sagittata. 



Leaf-blades oblong-triangular. 11. V. denlala. 



Petals usually notched. 12. V. emarginata. 



Leaves shorter than the scapes. 13. V. fimbrialida. 



Plants stoloniferous. 

 Corolla deep violet purple or sometimes white : naturalized species. 



14. V. odorata. 

 Corolla pale purple, violet-blue, j'ellow or white : native species. 



Corolla yellow. 15. V. rotundifolia. 



Corolla violet-blue or white. 

 Corolla violet-blue. 16. V. Selkirkii. 



Corolla white. 



