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Vachellia tortilis subsp. heteracantha

Family: Fabaceae (Legume family)

Common names: Umbrella Thorn (E); Haak-en-steek (Z); Haak-en-steek (A);

Native to: Southern Africa
Shrub, Tree
An evergreen – semi-deciduous tree wiht a rounded or flat-topped crown

Vachellia tortilis subsp. heteracantha

SEMI-DECIDUOUS

FULL SUN

FROST HARDY

LOW WATER REQUIREMENTS

MEDIUM GROWER

ATTRACTS BIRDS

ATTRACTS INSECTS

FLOWER COLOUR:

AVERAGE SIZE:

10m x 12m
FLOWERING TIME:
J F M A M J J A S O N D
FRUITING TIME:
J F M A M J J A S O N D

Vachellia tortilis subsp. heteracantha

DESCRIPTION

Formerly known as Acacia tortilis, this is an attractive flat-crowned tree with fine blue-green foliage. The bark is grey to dark brown and fissured.  The Afrikaans common name, Haak-en-steek, aptly describes the two types of thorn born by this tree – one is long, straight and white; the other is small, hooked and brown.  It bears masses of white to pale yellow fragrant ball-shaped flowers which attract a host of insects.  Although visited by a variety of insects during flowering, some trees may not produce fruit.

The seed pods are a distinctive feature as they are contorted and twisted into a tight decorative coil.

NATURAL HABITAT & DISTRIBUTION
Bushveld, Savanna woodland
WILDLIFE & ECOLOGICAL BENEFITS
The flowers attract a host of insects such as bees, butterflies, beetles and flies.
LANDSCAPING USES
A valuable tree to plant on a game farm or as a focal tree in a larger garden.
GARDEN THEMES
Bushveld, Woodland
FLOWERS
FOLIAGE
The small bluish-grey leaves are closely arranged along the stems to create a dense canopy.
FRUIT
The tightly coiled seed pods are are favoured by game and livestock.
BUTTERFLY/MOTH HOST PLANT
Anthene contrastata (Mashuna Hairtail)
Anthene talboti (Talbot’s Hairtail)
CULTIVATION
Easily propagated from seed. Soak in boiling water overnight and sow in a well-drained medium. Growth rate is relatively slow.
FURTHER READING

Charles & Julia Botha, 2006, Bring Butterflies back to your Garden, ISBN: 0-620-36665-6

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