Check out EDDMapS.org to see where this has been reported.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Fabids: Malpighiales
WEAKLEY'S FLORA (11/30/12):
Populus alba
FAMILY
Salicaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Populus alba
FAMILY
Salicaceae
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (1968) 051-02-003:
Populus alba
FAMILY
Salicaceae
COMMON NAME:
White Poplar, Silver Poplar
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USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_poal7_001_lvd
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Terry Holdsclaw tdh_populus_alba_1
Catawba County NC
Leaves white-felted hairy beneath; margin has fewer than 15 teeth per side, per Trees of the Southeastern United States.
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Terry Holdsclaw tdh_populus_alba_2
April Catawba County NC
Both pistillate & staminate trees may be encountered, but rarely together, per Woody Plants of the Southeastern US: A Winter Guide.