en.wikipedia.org
en.wikipedia.org
missouribotanicalgarden.org
Missouri Botanical Garden
https://www.missouribotanicalgarden.org › PlantFinder › PlantFinderDetails.aspx?kempercode=a894
srs.fs.usda.gov
USDA Forest Service Southern Research Station
https://www.srs.fs.usda.gov › pubs › misc › ag_654 › volume_2 › populus › deltoides.htm
plants.ces.ncsu.edu
North Carolina Extension Gardener Plant Toolbox
https://plants.ces.ncsu.edu › plants › populus-deltoides
fs.usda.gov
plants.usda.gov
USDA Plants Database
https://plants.usda.gov › DocumentLibrary › factsheet › pdf › fs_pode3.pdf
plants.usda.gov
USDA Plants Database
https://plants.usda.gov › plant-profile › PODE3
thespruce.com
gobotany.nativeplanttrust.org
gardenia.net
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