Betula pubescens Height: up to 20 m Trunk: strikingly white (betulin), smooth bark, cracking and darkening with age, reddish in colour Leaves: broadly ovate, 4-6 cm long, hairy on top and underneath Fruits/seeds: 2-3 cm long catkins Other: overhanging densely hairy branches Photos: Dorit Zimmermann (1,2,3,4)