40 LEAFLETS. 
Montana, where it was obtained by Mr. Knowlton in 1887. And 
there is a sheet from the Little Missouri Buttes in western 
Dakota, in the herbarium of the late T. A. Williams; these 
specimens small, only a foot high, but they have the essential 
characters of the species. 
P. PLANTAGINEA. Aquatic in shallow water, the stems only 
5 to 8 inches high: leaves not floating (unless the very earliest) 
but polished and glabrous, very large for the plant, the blades 
mostly 4 or 5 inches long, subcordate-lanceolate, merely acute 
not acuminate, ascending on stout petioles of an inch or more, 
the margins often serrulate-scabrous or at least scabrous-dentic- 
ulate, some small leaves under the spikes showing a strigulose 
pubescence, the foliage otherwise glabrous; spikes slender and 
elongated, 2 or 3 inches long, on stout glabrous peduncles quite 
as long; bracts rhombic-ovate, glabrous. 
Remarkable aquatic plant with leaves even rough-margined 
after the manner of Old World P. amphidia, but spikes as long 
and slender as those of Plantago major. The type specimens 
are on two sheets in U. S. Herb., collected in 1887 and 1888, 
from along Little Cedar River in the northern part of Iowa, by 
Mr. G. Holzinger, and were deposited in the herbarium where I 
find them by Prof. J. M. Holzinger. 
Its locality would be an interesting one for field study, with 
a view of investigating the plant’s possible relationship to some 
terrestrial form. 
P. want Aquatic in shallow water, without floating 
leaves, the rather slender copiously leafy stems 2 feet high or 
more, glabrous; leaves elliptic-lanceolate, with tapering base, 
or more precisely lanceolate with subtruncate but still rather 
narrow base, 3 to 6 inches long, acuminate, green, but not quite 
glabrous, a lens disclosing a minute and sparse short-hairiness 
on both faces, the midvein beneath clothed densely with very 
fine appressed hairs from a stout pustular base; peduncles 
short, rough with short strongly gland-tipped hairs; spikes 2 or 
3 inches long; bracts ovate, acute, lightly strigose and with a 
stronger set of marginal hairs. 
Plains of Colorado near the base of the mountains, probably 
