General: Flax Family (Linaceae). Linum perenne is introduced from Eurasia. Linum lewisii is a comparable U.S. native plant (figure 1). In general, flax is an annual or short-lived, semi-evergreen perennial forb, sometimes semi-woody at base with attractive flowers ranging from white to blue to yellow to red in color. Common in the western United States, blue flax is considered a woody subshrub in the PLANTS database (USDA, NRCS 2000). According to Cronquist et al. (1997), “the only significant difference between Linum lewisii and the Eurasian Linum perenne appears to be that the former is homostylic, and the latter heterostylic.”
Flax plants have many narrow, small, alternate (rarely opposite), simple and entire leaves that are sessile (lacking stalks) on the stems. The perfect and regular, generally showy flowers are borne in racemes or cymes. The sepals, petals, and stamens are five, the fruit a capsule, and the seeds in most species are mucilaginous when wet.
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