Abbott - 25387 - United States
Abbott - 26596 - United States
Atha - 6993 - United States
Atha - 7046 - United States
Brischetto - s.n. - United States
Bush - s.n. - United States
Davis - s.n. - United States
Hinton - 17976 - Mexico
McHale - 371A - United States
McHale - 41 - United States
McNeill - 1536 - United States
MILLS - 5894 - United States
Nee - 55597 - United States
Populus tremuloides
Seymour - 21447 - United States
Steyermark - 28640 - United States
Summers - 2703 - United States