The sweet thorn (Acacia karroo) can punish absentminded travellers with its very long and rather sharp thorns.
It does however have a sweeter side; its gum.
The gum is sweet, edible and water soluble. It is used in syrups for soft drink, candy, icing sugar, chewing gum and as a lick-able adhesive e.g. on postage stamps.
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