Quercus cerris Height: up to 30 m Trunk: dark grey, longitudinally fissured bark Leaves: elongated elliptical, deeply lobed in variegated shapes, shiny dark green Buds: surrounded by thread-like stipules (approx. 2 cm long) Flowers: yellow catkins in April, bee-friendly Fruits/seeds: ovoid fruits with spiky fruit cups, clustered in groups Photos: Dorit Zimmermann (1,2,3,4,5)