Butternut


Juglans cinerea, commonly known as butternut or white walnut,[3] is a species of walnut native to the eastern United States and southeast Canada. Like other members of the family Juglandaceae, butternut's leafout in spring is tied to photoperiod rather than air temperature and occurs when daylight length reaches 14 hours. Wikipedia


You can help scientists understand how climate change is impacting this species by using the phenophase guide below to observe its lifecycle in Nature's Notebook.


Butternut Phenophase Guide
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