Lewis’s Wild Flax
Photo: Derek Ramsey (Ram-Man), CC BY-SA 3.0
Lewis collected the first specimen of this wild flax on July 9, 1806, near the Sun River in Montana, during the expedition’s return journey. Frederick Pursh named the species in Lewis’s honor. The delicate blue flowers of Lewis’s wild flax bloom across the western prairies and mountains. Native peoples used the plant’s fibers for cordage.
Journal Excerpt
Lewis, July 18, 1805: "I have observed for several days a species of flax growing in the river bottoms the leaf stem and pericarp of which resembles the common flax cultivated in the U' States."
Where it’s being seen today
3 research-grade iNaturalist observations between 2016–2025. Most recent: 2025-05-26. Sourced from Terrain360 trail captures, cached locally.
Journal References
15 journal entries mention Lewis’s Wild Flax