Strychnos pungens (English: spine-leaved monkey-orange, Afrikaans: Stekelblaarklapper) is a tree which belongs to the Loganiaceae.

Leaves are smooth, stiff, opposite, elliptic and with a sharp, spine-like tip.

The fruit is large (120mm diameter), round and with a smooth hard shell, bluish-green in colour and turning yellow when ripe.

The pulp of ripe fruit is rich in citric acid and is edible, but the seeds are mildly poisonous.

The tree is a close relative of Strychnos nux-vomica, the source of strychnine.