Betula nigra (= B. rubra) (eastern North America)
Habit: Tall tree, 15-20 m, width from 6-8-12 m, often with several stems, or with one stem, loose, round crown to somewhat umbrella-shaped; twigs loosely arching, not hanging; initially fast-growing, 40-60 cm a year, after 20 years 20-30 cm.
Flowers: Monoecious, yellowish catkins, before leaves shoot, April.
Bark: The bark is not black, but rather cinnamon-brown, peeling in curly strips from the stem.
Leaves: Diamond-shaped, initially dull, later shiny green, velvety hairs, pale yellow in October.
Roots: Shallow, reaching very far, dense.
Demands: Only in full sunlight, avoids shade, frost hardy.
Soil: Nutritious, moist or even damp soil, tolerates floods and moderately dry areas.
Hardiness: Zone 5a