110 LEAFLETS. 
short, as also its peduncle, this very rough with short strigose 
points and glandless. 
Sterile low riparian state with leaves no larger, thinner, alto- 
gether glabrous except us to margin and the midvein beneath, 
these much less emphatically scabrous than in the flowering 
plants. 
Aquatic state sterile, the floating leaves larger, 4 inches 
long or more, subcordate-oblong, acutish, glabrous. in every 
part, even marginally; petioles stouter than in aquatic states of 
other species but 2 inches long. 
This is the smallest species of the group that I have seen, as 
to the height of the land plant, the size of its leaves and also 
of its spikes. It is even smaller than many of the common 
annual Persicarias as to foliage, inflorescence, and even as to 
stem. It is from what Mr. Andrews calls Misery Swamp, near 
Southington, 21 Sept., 1904, which my correspondent describes 
as “a wet meadow of possibly six acres, with a small slow stream 
running through it. This meadow is so wet as to require the 
use of rubber boots to get about in it; there being many pools 
of water of varying size, and the land between them very wet. 
The plants were quite numerous all about the meadow, some 
standing in the pools of water, some on the drier land, others 
along the banks of the stream where they often extend down 
into the water and assume a floating form of stem and leaves. 
But very few flowers were found.” 
I must add that under the same cover containing the new 
species, were a number of sterile stems of P. Hartwrightit, 
showing that this also inhabits the same swamp. 
What is Nuttallia Davidiana ? 
In a lately offered recension of Osmaronia (Pitt. v. 309) H 
made no note of Muttallia Davidiana, not being able to iden- 
tify it as a species of that genus. The name makes its first 
appearance in the Kew Index, where it is credited to Baillon ; 
