trifidium var. integrifolium Makino (A. trifidium is an old synonym of A. buergerianum), but are now not distinguished from the species.[5] Occasional unlobed leaves also occur on most trees with otherwise normal three-lobed leaves.[6] ...
Trident Maple (acer buergerianum or acer trifidum). It is a much appreciated tree for its autumn colors and shapely branches. It responds well to trimming, has a tendency to form roots on the surface, and produces dense growth with small leaves.