swamp cottonwood Salicaceae Populus heterophylla L. Listen to the Latin symbol: POHE4 Other Fact Sheets
Leaf: Alternate, simple, broadly ovate, serrated margin, heart-shaped base, 4 to 7 inches long, petiole round, green above and paler below.
Flower: Species is dioecious; males occur in 1 inch long catkins, females occur in a sparse flowered catkin, appearing before leaves.
Fruit: Half inch capsules in hanging catkins, appearing in spring.
Twig: Stout, reddish or greenish brown, lighter lenticels, large leaf scar, orange-brown pith; buds are 1/3 inch long, reddish brown, broad and pointed, slightly gummy. Twig has a bitter aspirin taste.
Bark: Gray-brown, strongly vertically ridged.
Form: Medium to large tree that can reach heights over 80 feet, straight trunk and clear bole.

Looks like: eastern cottonwood - water tupelo
leaf twig bark form1 map
Additional Range Information:
Populus heterophylla is native to North America.
Range may be expanded by planting.
See states reporting swamp cottonwood.
More: Fall Color Wood
External Links:
USDAFS Silvics of North America
USDA Plants Database
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Photos and text by: John Seiler,
Edward Jensen, Alex Niemiera,
and John Peterson
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