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,
National colours of the Czech Republic occupation of the Protectorate Bohemia and Moravia, these colours became official flag of the Protectorate. Although the colours weren't recognized official symbol in the Socialist Constitution from the 1960, the colours remained in usage, especially during manifestation – such as the Prague Spring or the Velvet Revolution. The colours are recognized as one of the official symbols of the independent Czech Republic from 1993. The national colours are used for indication of the state property and for decoration during state ceremonials. Furthermore, they are used in the medal ribbons, and coffin wreath ribbons. During public holidays some people wear national