Acanthosicyos Naudinianus The Gemsbok Cucumber is a herbaceous perennial plant with annual creeping vines from an underground tuberous rootstock, with a disproportionately large fleshy root that penetrates a meter or more into the sand. The 15 centimetre thick root will grow to one meter in length, the vines reach for up to six meters. Tendrils modified into weak spines. Leaves usually deeply pamately 5-lobed, with lanceolate lobes which are more or less irregularly lobed or toothed again, cordate at the base, softly to roughly hairy on both surfaces, particularly on the veins. Flowers solitary, axillary, sexes on different plants, yellow to white. Fruit is oval-shaped, ellipsoid to almost round, 6-12 cm long, blue-green, turning pale yellow when ripe, covered in bristle-tipped spines.