Betula cordifolia Regel
heartleaf paper birch, mountain paper birch
heartleaf paper birch, mountain paper birch
July 8,
Arnold Arboretum, Jamaica Plain, Boston
Leaves mostly cordate (rarely rounded) at base; lateral veins 9-12 pairs (less than 9 pairs in B. papyrifera). An Arboretum lineage originating from a plant collected by C.S. Sargent.