Flax have been domesticated just once from the wild species "Linum bienne", called pale flax. Several other species in the genus "Linum" are similar in appearance to "L. usitatissimum", cultivated flax, including some that have similar blue flowers, and others with white, yellow, or red flowers. Some of these are perennial plants, unlike "L. usitatissimum", which is an annual plant. Cultivated flax plants grow to tall, with slender stems. The leaves are glaucous green, slender lanceolate, 20–40 mm long, and 3 mm broad. The flowers are pure pale blue, 15–25 mm in diameter, with five petals. The fruit is a round,
Plant milk popular non-dairy milk, but, starting around 2010, "almond milk" began to increase in popularity, and in 2013 it surpassed soy milk as the most popular variety. Other popular milks in the US are "rice" and "coconut milks". In the U.S., plant-based milk is 9.3% of the total milk market. In Europe, "soy" and "oat milks" are popular. There is also hemp milk, cashew milk, hazelnut milk, flax milk, and milk from peas and lupin. The global dairy alternative market is set to be worth US$16.3 billion in 2018. Plant milks are also used in making ice cream, plant cream, vegan