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 

 pubes.cence, the foliage otherwise glabrous ; spikes slender and 

 elongated, 2 or 3 inches long, on stout glabrous peduncles quite 

 as long ; bracts rhombic-ovate, glabrous. 



Bemarkable aquatic plant with leaves even rough-margined 

 after the manner of Old World P. amphibia, 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 Eiver 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. Waedii. Aquatic in shallow water, without floating 

 leaves, the rather slender copiously leafy stems 3 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 stf ongly 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 



