212 . THE CORRESPONDENCE OF SCHWEINITZ AND TORREY 
10. Potamogeton fluitans of Europe is extremely different from 
natans—but I have never met with it in Am. 
11. Potamogeton pauciflorum; this is common here—but it is 
surely not the P. gramineum of Germany, which again is a 
most common brook species in Carolina, agreeing perfectly 
with the German one. 
Lithosperm|um] latifolium of Mx. is a plant perfectly distinct from 
L. officinale—and common in the western woods—Bartram’s 
I presume is not the true one. 
Lysimachia hybrida as I have it in Salem—is surely distinct from 
L. ciliata-—Why do you consider that and heterophylla (of 
which I am ignorant) the same? The name seems to require 
quite a different plant. 
Verbascum Blattaria. I am very sorry that I possess but one 
specimen—found by myself in Surrey County, N. C.—of 
V. Claytoni. It is as distinct and beautiful a species as can 
Ipomaea purpurea and Nil; tho these are probably not indigenous 
here—there can be no doubt of their being so southwardly. 
Convolvulus spithameus and tomentosus [the name Convolvulus 
tomentosus does not appear in Torrey’s work, but Calystegia 
tomentosa is given as a synonym of Convolvulus spithameus]. 
I fancy there must be a great confusion as regards this and 
the next. Spithameus, common in Carol., I have not ob- 
served here, and there it is never trailing nor pubescent—and 
C. tomentosa is absolutely tomentosely velvety and trailing 
(I therefore doubt whether it is stans) —It was found by me 
on the tops of the Allegany mount[ains] in quantities. 
Impatiens. I am astonished to read your remark concerning the 
similarity of pallida and fulva—for what I distinguish as 
each—are altogether different—Both grow here.—The flower 
of pallida is double the size of fulva. 
Ceanothus. The common species in Carolina is utterly devoid of 
pubescence except on the ribs—but it is not altogether 
herbaceous—the stems do not die more than half down. 
Campanula americana and acuminata—as distinguished by me— 
the former only in Carolina—the latter here and Ohio—are 
certainly two very good species—The leaves of the latter are 
very thick, those of the first remarkably thin. 
