Vachellia reficiens (Afrikaans: Rooihak, German: Rotrindenakazie), commonly known as red-bark acacia, red thorn,[3] false umbrella tree,[3] or false umbrella thorn,[4] is a deciduous tree or shrub of the pea family (Fabaceae) native to southern Africa, often growing in an upside-down cone shape and with a relatively flat crown.

The flowers are white- to cream-coloured, and mostly seen during the summer months of December and January, but they can blossom almost all year round, depending on the geographical location.

Vachellia reficiens is found in the drier areas of Africa, in the countries of Angola, Ethiopia, Kenya, Namibia, Somalia, Sudan and Uganda.

[9] This plant prefers rocky soil types and it does not grow in high rainfall areas, but rather in semidesert and arid shrubland.

[11] In Namibia's Kaokoveld region, the branches of this tree are used for fencing and the bark is used to curdle milk, while the thorns can be used to pierce ears.