Corylus maxima ‘Purpurea’ Purple-leaf Filbert (south-eastern Europe)
Habit: Like C. avellana.
Flowers: Before leaves shoot; reddish, male flower catkins; (February) March-April.
Fruits: Edible, reddish nuts.
Leaves: Roundly cordate, metallic-shiny when shooting, nice black-red; less intense in summer; green-red in the shade.
Demands: See C. avellana, the black-red is best in full sun.
Hardiness: Zone 5a