220 AMERICAN MIDLAND NATURALIST 
The aquatic plant was found by me along the Shenandoah 
River near Luray. The aquatic phase is No. 697a, as referred to 
above, several of the plants on the same sheet with the riparian 
phase No. 697 were found with it. 
Following are other good examples of P. coccinea which I 
have studied in the U. S. National Herbarium. 
No. 444732. Collected in Huron Tp. Erie Co. Ohio, VIII, 18, 
1892. 
-No. 672000. Webster Co., Iowa. XIII. 1, ’og. 
No. 672476. M. P. Somes, Webster Co., Iowa, VIII, 13, 1909. 
From the New York Botanical Garden Herbarium I select 
the following: 
[Thomas Morong’s Rockland Lake, N. Y. VIII, 26, 1891.] 
This is probably an aquatic phase of P. coccinea rather than 
of any other amphibious plant. One could not be certain, however, 
unless the terrestrial plants growing near had also been collected. 
Collectors will some time perhaps reallize that it is impossible 
in many cases to tell the difference between what is called “P. 
amphibia”’ and “‘P. emersa,’”’ when the above description of the 
‘real’? P. emersa or (P. coccinea) aquatic is compared to the 
description of “P. amphibia”’ as outlined in our manuals, and 
understood by most botanists today. As the manuals describe 
the two plants, one can readily see why we might conclude on a 
very conservative basis to suppress P. emersa altogether, with 
P. Hartwrightw, unless, as I have pointed out, another system of 
distinctions be adopted from that of the manuals of today. 
C. W. Short, Kentucky, 1840, also in the N. Y. Bot. :Garden 
Herbarium contains as one of the specimens what might be P. 
coccinea in its aquatic phase. If the two specimens are found one 
plant, it is an interesting fact to deduce, that our older collectors 
were more careful than in recent years to gather complete plants! 
Another specimen from the Torrey Herbarium ‘‘New York 
near Albany.” also “H. H. Eaton’s, Troy.’’ also Letterman’s. 
Valentine, Mo. VIII, 1903. (?) G. L. Clothier’s No. 458. 1896. 
The last specimen has four spikes of flowers! J. B. Norton’s No. 
458 Riley Co., Kan. VII., 22. W: Eggleston’s “Western Vt.” 
IX, 23, 1899. This plant has the aspect of the terrestrial P. mes- 
ochora, and thus resembles the plant I found along the Potomac, 
as already referred to. 
From Mr. Chas. Deam I have his No. 1700 from the banks of 
