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Sclerolinon digynum, the northwestern yellowflax, is a small annual wildflower of the flax family found in seasonally wet western US meadows and vernal pools, and it is rarely grown as a garden plant. It is a monotypic genus, so this entry covers the single species.
Sclerolinon is a monotypic genus of flowering plants in the flax family (Linaceae) containing the single species Sclerolinon digynum, which is known by the common names northwestern yellowflax and yellow hard flax. It is native to the western United States, where it has been recorded in Washington, Idaho, Oregon, and as far south as central California. It grows in seasonally wet habitats, such as mountain meadows and vernal pools.
It is an annual herb producing a hairless, erect stem up to 20 cm (7.9 inches) tall. The leaves are oval in shape, and the upper leaves have serrated edges. They are oppositely arranged about the stem and grow erect instead of spreading away from the stem. The inflorescence is a cyme of flowers surrounded by serrated, leaflike bracts. The flower has five yellow petals in a calyx of toothed sepals.
S. digynum has historically been found in the U.S. states of Idaho, Washington, Oregon, and California.
Text excerpted from the Wikipedia article Sclerolinon by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
