Narrow Leaved Cottonwood
Populus angustifolia
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Calscape.org
Fremont Cottonwood
Populus fremontii
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Nimbus Fremont Cottonwood (male)
Populus fremontii 'Nimbus'
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Fremont Cottonwood
Populus fremontii ssp. fremontii
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Quaking Aspen
Populus tremuloides
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Black Cottonwood
Populus trichocarpa