Pale flax grows as a biennial or perennial plant in dry, sunny calcareous or neutral grasslands from sea level up to 1000 m. It has long, narrow stems to 60cm tall and slender leaves 1.5–2.5cm long. The flowers have five petals about 1cm long and nearly round; they are pale blue but streaked with darker colour. It flowers in late spring and, at least in more temperate regions, through the summer. The flowers are hermaphroditic and are predominantly self-fertilising.
Linum bienne (=L. angustifolium) is considered the probable wild forebear of the cultivated flax,[3] and a fibre can be made from its stem. It is sometimes grown as a garden plant.
It is an introduced species in Chile.[4] Also, it has been introduced into North America, where it is naturalized on the Pacific coast from Oregon to the central coast of California, and also in Pennsylvania; it is found in Hawaii, as well.
↑Allaby, R.; Peterson, G.; Merriwether, D.; Fu, Y.-B. (2005). "Evidence of the domestication history of flax (Linum usitatissimum L.) from genetic diversity of the sad2 locus". Theoretical and Applied Genetics. 112 (1): 58–65. doi:10.1007/s00122-005-0103-3. PMID16215731. S2CID6342499.
