Flax Flax Seed Oil, Powder & More Many are familiar with flax seed oil, but did you know, flax seeds, also known as linseeds, come from the flowering flax plant (Linum usitatissimum) in the family Linaceae. They have been cultivated for thousands of years and have long been revered for their impressive nutritional benefits. https://www.nationalnutrition.ca/food-supplements/flax.html #flaxseeds