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 palaui Flax palaui Flax palaui is a moth of the Micronoctuidae family. It is found in Micronesia (it was described from Babelthuap Island in Palau). The wingspan is about 10 mm. The labial palps, head, patagia, tegulae, thorax and the ground colour of the forewings (including fringes) are dark brown. The base of the costa and the quadrangular narrow patch in the upper medial area of the forewing are slightly darker brown. The crosslines are indistinct. The terminal line is only indicated by dark-brown interveinal dots. The hindwings are light grey without a discal spot. The underside of the forewings is