256 PITTONIA. 
ment, require seven or eight days for drying. But my re- 
searches of the year 1897 have demonstrated that V. emar- 
ginata, and this only of all the immediate allies of V. sagittata, 
very commonly presents a foliage as much cut palmately as 
V. palmata itself; so that I have no doubt it may be found 
in several herbaria, under the name of V. palmata; from 
which, however, it is most easily distinguished, in whatever 
leaf-form, by the aerial and slender peduncles of its apeta- 
lous summer flowers. 
VioLA DENTATA, Pursh. This plant, in common with 
V. ovata, departs widely and altogether specifically from 
V. emarginata in having an oblong basally almost truncated 
foliage, the whole herbage being of a yellow-green, and the 
plant about twite as large, the flowers proportionately 
smaller. The petals, however, are emarginate in V. dentata 
as in emarginata ; a cireumstance which appears to have had 
too much weight with Le Conte, leading him to unite the 
two under the one name of V. emarginata ; but a beautiful 
unpublished colored drawing of his, labelled V. emarginata, 
the drawing now in my possession, plainly represents what 
I take to be V. dentata ; and it appears to be quite the same 
as Mr. Pollard's lately published V. Porteriana. Pursh’s 
type, it must also be noted, was from quite the same region 
which furnished the type of V. Porteriana. Both Mr. Pol- 
lard and I seem to have been put off our guard as to V. den- 
tata by accepting Le Conte's statement that it was the same 
as V. emarginata. ` 
EXPLANATION OF PLATES. 
V.— Viola emarginata, the more typical form, with uncut trigonous foliage, 
as it appears at first flowering in spring. 
VI.—Large sestival leaf of the same form, at time of later apetalous flow- 
VII.—Cut-leaved form of the same species, at its vernal flowering. 
VIII.— Large estival foliage of the same palmated form. All the figures 
are of about the natural size; those of the mature leaves some- 
what reduced from that. 
