You may also want to check Trees, Shrubs, and Woody Vines of North Carolina
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Fabids: Malpighiales
WEAKLEY'S FLORA (11/30/12):
Populus deltoides var. deltoides FAMILY Salicaceae
PLANTS NATIONAL DATABASE:
Populus deltoides ssp. deltoides FAMILY Salicaceae
VASCULAR FLORA OF THE CAROLINAS (1968) 051-02-002:
Populus deltoides FAMILY Salicaceae
Click or hover over the thumbnails to see larger pictures.
Terry Holdsclaw tdh_p_deltoides_delt_7860
March Iredell County NC
2-4" staminate & pistillate catkins appear before leaves in early spring, per Native Trees of the Southeast, An Identification Guide.
Terry Holdsclaw tdh_p_deltoides_deltoid_1
December Catawba County NC
A large native tree with a wide crown, to 45m tall in some sites, per Woody Plants of the Blue Ridge.