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,
Flax neptun Flax neptun Flax neptun is a moth of the Micronoctuidae family. It is found in Indonesia (eastern Bali). The wingspan is about 10.5 mm. The forewings and fringes are light brown. There is a black quadrangular patch in the upper medial area with a ventro-basal small black dot. The base of the costa is black, subapically with small brown dots. The crosslines are indistinct; except the brown subterminal line. The terminal lines are indicated by dark-brown interveinal dots. The hindwings are grey with an indistinct discal spot. The underside of the forewings is unicolourous brown and the underside of the