THE CORRESPONDENCE OF SCHWEINITZ AND TORREY 187 
q * Hippuris vulgaris. I have American spec. only from Labrador—& 
. these are altogether identical with numerous European speci- 
$ mens—so that I do not believe in the existence of another 
Am. species. 
Callitriche verna B intermedia. I believe to be the same with 
heterophylla Pursh—but think the latter name more appro- 
priate. 
linearis Pursh which I have found in N. Carol. rarely— 
& had beautiful fructiferous specimens from (Cherokee 
Country—is not at all the same with C. autumnalis of Europe. 
The autumnalis of Europe is certainly different I think from 
linearis—I can send you specimens of both—which tend to 
prove it. 
terrestris. I have much doubted the specific difference 
of this from heterophylla—since I observed a spot, where the 
heterophylla was floating, dry off & exhibit undoubted 
terrestris, shortly after, on its dry surface. 
Blitum; all the spec., as American, are unknown to me & desirable, 
$` especially maritimum—as I have spec. from Europe of the 
others. 
Ornus. I wonder by what means one could get at this fabulous 
tree. 
Veronica Beccabunga. I have found in Ohio—exactty the Euro- 
pean—what is here called anagallis is certainly not the true 
European one—I have called it intermedia var. 
Veronica reniformis Raf. cannot scarcely be different from arvensis. 
Gratiola virginica. Taking the neglecta for the true Linnean 
virginica, that of Elliott, which is manifestly distinct—& has 
been found by me here at Beth-—& by Capt. Leconte on 
Schooley’s mountain [New Jersey] ought to be distinguished 
by another name—perhaps Elliotti—& inserted. Have you 
no Northern specimens? 
3 ; . megalocarpa.—greatly desired— 
Lindernia dilatata you sayis much rarer than attenuata. The 
d` latter I have never found in Pennsylvania. The former is in 
| great plenty on the shores of the Susquehannah—Harris- 
b[ur]g. 
Catalpa. With your leave—is not the word south in the Hab. a 
misprint for north? 
