Sideroxylon spinosum, known as argan (Tashelhit: ⴰⵔⴳⴰⵏ, romanized: argan), synonym Argania spinosa, is a species of flowering plant. It is a tree endemic to the calcareous semi-desert Sous valley of southwestern Morocco and to the region of Tindouf in southwestern Algeria. Argan trees grow to 8–10 m (26–33 ft) high and live up to approximately 200 years. They are thorny, with gnarled trunks and wide spreading crown. The crown has a circumference of up to 70 m (230 ft) and the branches may lean towards the ground.

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