| |
site |
site # (info) |
collection date |
kind |
depth |
substrate |
salin |
comments |
reference |
| A |
Washington, District of Columbia, USA |
1457
 map | 1956 or earlier |
|
|
|
freshwater |
stream. |
Nuttycombe JW (1956): 427 |
| B |
Scottsville, Virginia, USA |
1687
map | Oct 14, 1928 |
type locality |
|
|
freshwater |
stream near Scottsville. |
Kepner WM, Carter JS (1930): 301 |
| C |
Washington, District of Columbia, USA |
1457
map | 1944 or earlier |
|
|
|
freshwater |
growing abundantly in a large aquarium in the biology department, Catholic University. |
Heinlein E, Wachowski HE (1944): 150 |