Kirkia is a genus of plant in family Kirkiaceae. Kirkia acuminata is a small indigenous tree with a smooth, grey trunk. It has beautiful autumn foliage and is suitable for warmer areas. It is also known as White Syringa.
Kirkia acuminata is a straight-stemmed tree with a fine, round, leafy crown. It grows from 6 to 18 m high with a trunk diameter of 0.8 m. The leaves are sticky when young, colouring splendidly to gold and red in autumn. The leaf is compound with 6-10 leaflets and one terminal one. The narrowly ovate leaflets are 20-80 x 10-25 mm, with or without hairs. The apex is narrowly tapering to a long point. Kirkia acuminata flowers from October to December with small greenish cream flowers. The fruits are thinly woody capsules of about 10-20 x 6-10 mm that are 4-angled, and split into four seed pods when mature. Each seed pod contains a seed. The wood is yellowish brown, light and soft. Kirkia acuminata extends from Gauteng, Botswana, Namibia, and to the north in Tanzania. It grows in the bushveld and lowveld of Gauteng in deep, sandy soil or on rocky hills.