196 ON SEEDLINGS 



No. 3. Oblong-cordate, obtuse, more deeply crenate. 



No. 4. Cordate, obtuse, rather deeply crenate. 



No. 5. A little more elongated than No. 4. 



No. 6. Cordate-ovate, rather deeply crenate. 



Ultimate leaves oblong-lanceolate, obtuse, serrate-crenate, or the 

 uppermost lanceolate, elongated and narrowed to an obtuse point, 

 with long ascending lateral veins ; stipules foliaceous, very large, pin- 

 nately divided near the base, with the greatest number of lobes on 

 the posterior side and almost surrounding the stem. 



Viola palustris, L. (fig. 189). 

 Primary root as in V. tricolor. 

 Hypocotyl as in V. tricolor. 



FIG. 189. Viola palustris. Nat. size. 



Cotyledons oblong, obtuse, mucronulate, glabrous ; lamina 6 mm. 

 long, 3-5 mm. broad ; petiole channelled above, 3-5 mm. long. 



Stem herbaceous, perennial, with undeveloped nodes, and throw- 

 ing off numerous stoloniferous branches from the axil of the first 

 leaf, upwards. 



Leaves radical and cauhne on the stolons, conspicuously nerved and 

 reticulate ; stipules smaU, ovate, serrulate, green, mottled with red- 

 petioles channelled above, glabrous, pale green, mottled with red. 



