Dicotyh or Exogenous Plants. 83 



Vi'-o-la pal-ma'-ta L. Common Blue Violet. — Early leaves roundish- 

 cordate or reniforni and merely crenate, the sides rolled inward when 

 young, the later ones palmately or pedately lobed or parted, the seg- 

 ments obovate or linear. 



Vi'-o-la ob-li'-qua Hill. (/'. palinata var. cucullafa Gr.) Common/* 

 Blue Violet. — As the preceding but the later leaves merely crenate, nof 

 lobed. 



Vi'-o-la sag-it-ta'-ta Ait. Arrow-leaved Violet. — Leaves ranging from 

 oblong-heart-shaped to halbred-shaped, arrow-shaped, oblong-lanceo- 

 late or ovate, denticulate, sometimes cut-toothed near the base; the 

 lateral (or all) petals bearded. 



( (d. Rootsiocks /ong and ftJ'fotm : extensively c^^^hig\]]) 



Vi'-o-la blan'-da Willd. Sweet White Violet. — Flowers small, white, 

 short-spurred, petals mostly beardless, the lower strongly veined; 

 leaves round-cordate or kidney-form. 



Vi'-o-la lan-ce-o-la'-ta L. Lance-leaved Violet. — Leaves lanceolate, 

 erect, blunt, tapering into a long-margined petiole, almost entire; 

 petals beardless, white, small, spur short. 



Vi'-o-la ro-tun-di-fo'-li-a Mx. Round-leaved Violet. — Flowers yellow, 

 lateral petals bearded and marked with brown lines; leaves round- 

 ovate, cordate, slightly crenate, 1 in. broad, becoming 3-4 in. broad in 

 summer. 



(b. Leafy stemmed. 



((e. Stipules entire^ spur very short, stems erect)) 



(('f. Steins naked helo7i' ; flowers yellouK])) 



Vi'-o-la pu-bes'-cens Ait. Downy Yellow Violet. — Softly pubescent, 

 6-12 in. high ; leaves very broadly heart-shaped ; stipules ovate or 

 ovate-lanceolate, large. 



Vi'-o-la scab-ri-us'-cu-la (T. & G.) Schw. [V. pubescens var. scab- 

 riusciila T. & G.) Yellow Violet. — Differs from the last in being 

 smaller, 4-10 in. high, greener, and slightly pubescent. 



Vi'-o-la has-ta'-ta Mx. Halbred-leaved Violet. — Nearly glabrous,'slen- 

 der, 4-10 in. high ; stem-leaves halbred-shaped or oblong-cordate, 

 slightly serrate, acute; stipules ovate, small. Northern Ohio. 



