This maybe unfair at this season but trying to determine tree, Box Elder Maple or Ash. Unfortunately, leaves are down. Tree is in horse pasture and if Box Elder, only just now learned seeds are toxic to horses. Thanks if you can help. Brad Jacobsen https://extension.umn.edu/trees-and-shrubs/boxelder https://stablemanagement.com/articles/boxelder-trees-are-toxic-to-horses