From big +‎ leaf.

bigleaf (not comparable)

1. Applied to various kinds of plant characterized by large leaves.

• bigleaf wood aster (Eurybia macrophylla)
• bigleaf maple (Acer macrophyllum)
• bigleaf hydrangea (Hydrangea macrophylla)
• bigleaf magnolia (Magnolia macrophylla)

• GIFable, filabeg