Osmin purple basil is a cultivar of Ocimum basilicum (sweet basil) with dark purple leaves. It is distinguished from other purple basil varieties by smaller, darker.^{[citation needed]} It has the darkest leaves of any purple basil variety.^[1] The plant averages a height of 50 centimetres (20 in) and is grown in sunny or partially sunny environments.^[1][2]

It is a flower.