Populus angustifolia James  
Family: Salicaceae
Narrow-Leaf Cottonwood,  more...
[Populus balsamifera var. angustifolia (James) S. Wats.,  more]
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L.R. Landrum  
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Max Licher  
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L.R. Landrum  
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Max Licher  
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Patrick Alexander  
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Patrick Alexander  
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Douglas Koppinger  
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Douglas Koppinger  
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Douglas Koppinger  
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The National Science Foundation
This project made possible by National Science Foundation Award 1410069