1898 ] EASTERN ACAULESCENT VIOLETS 329 
Leaves scarcely at all cucullate. 
Leaves yellowish-green, prominently veined, obtuse 
14. V. affinis 
Leaves bright green, not prominently veined, acute 
12. V. obligua 
CLASS 4. Sagittate. Leaves all similar, ovate-sagittate or ovate-lanceo- 
late in general outline; entire or slightly lobed; peduncles of the cleistogamous 
flowers strictly erect; flowers dark purple. 
Plants distinctly villous-hirsute. 
Spur of the corolla saccate-dilated; leaves with a deep sinus 
21. V. Carolina 
Spur of the corolla not conspicuous; leaves with a shallow sinus or 
20. V. ovata 
none 
Plants glabrate or only ciliate. 
Leaves elongated-oval, of nearly similar diameter throughout ; basal 
lobes conspicuous 17. V. sagittata 
Leaves ovate-triangular, nearly equilateral, the base truncate, not 
often lobed; petals emarginate 18. V. emarginata 
Leaves clongated- -ovate, tapering to apex, slightly dentate at base 
19. V. dentata 
CLASS 5. Odorate. Plants stoloniferous; leaves reniform-cordate; flowers 
purple 
Rootstock thickened, scaly; plant introduced 22. V. odorata 
Rootstock filiform ; species native, far northern. 
Leaves hirsute-pubescent, crenate 23. V. Selkirkis 
Leaves glabrous, crenulate 24. V. palustris 
SECTION III. 
Leaves variable in outline; plants mostly stoloniferous from filiform root- 
Stocks; spur short and saccate; stigma short, pointed; petals yellow or 
white, usually veined with purple; position of the cleistogenes various. 
CLASS 6. Blandz. Corolla white. 
Leaves from ovate to orbicular; cleistogenes deflexed. 
Leaves reniform, pubescent 29. V. . rentfolia 
Leaves cordate-ovate, glabrate. 
Petioles red-spotted; leaves pale beneath 30. V. amoena 
Petioles not red-spotted ; leaves green beneath 28. V. banda 
Leaves from ovate-lanceolate to narrowly linear ; cleistogenes erect. 
Leaves linear or Rape 
Blade and petiole coalescen 
Blade and petiole distinct, of nearly equal length 
26. V. lanceolata 
Leaves ovate-lanceolate, the blade decurrent 27. V. primulaefolia 
25. V. vittata 
