Scientific name: Acacia (Vachellia) tortilis subsp. heteracantha
Common names: Umbrella thorn, Haak-en-steek
Umbrella thorn is a semi-deciduous tree up to 20 m tall. This tree provides nesting sites for birds. It can be used as a shade tree but has the nasty habit of dropping old thorns. It is frost and drought-resistant. It has an extensive root system and must not be planted near buildings or paved areas. The umbrella thorn is a popular bonsai plant.