Betula cordifolia

Mountain paper birch is in the birch or Betulaceae family and is native to eastern Canada and the northeastern United States. It used to be considered a variety of B. papyrifera. It can reach a height of 25 m tall.

• Leaves are alternate, simple, ovate, 6–12 cm long and double-toothed, with a heart-shaped base, dotted with many resin glands.
• The species is monoecious; flowers are pollen catkins 2-4 cm long and seed catkins 3-5 cm long, fragmenting in winter.
• Mature bark is white, peeling horizontally in layers; young bark is shiny brown with lenticels.
• Twigs are yellow-brown to dark brown; buds are ovoid and blunt.
• It is distinguished from B. papyrifera by leaves being dotted with resin glands, having a heart-shaped leaf base and young shoots that are not hairy.