Western Blue Flax

🌿 California native

Quick facts

• Habitat: Dry open ridges and slopes, Montane to sagebrush and pinyon-juniper
• Form / size: Airy wiry perennial, 1–2.5 ft
• Sun: Full sun · Water: Very low
• Blooms: Sky-blue saucers, spring–summer (petals drop by noon) · Pollinator value: Moderate

Description

An airy, wand-like perennial that scatters sky-blue flowers over dry open ground. Slender, wiry stems rise a foot or two from a woody base, clothed in narrow, alternate, blue-green leaves. The flowers are shallow saucers of five sky-blue to pale-lavender petals, delicately veined in darker blue with a yellowish center, borne on nodding stalks. They are fleeting: each flower opens in the morning and its petals drop by midday on a hot sunny day, so the plant is always renewing its bloom. The fruit is a small rounded five-chambered capsule.

Indigenous & historical use

In the Great Basin and Eastern Sierra, within the plant’s range, the Shoshoni used western blue flax as a dermatological remedy, applying a poultice of the plant to reduce swellings. The use is recorded in Percy Train, James Henrichs, and W. Andrew Archer’s 1941 survey, Medicinal Uses of Plants by Indian Tribes of Nevada.

Ecological role

Western blue flax is a hardy perennial of dry, well-drained, open and disturbed slopes, tolerant of cold to about −20°F. Its flowers are self-incompatible, opening for only part of a single day and relying on visiting insects for seed set, so its spring bloom feeds native bees and butterflies. It establishes quickly on poor soils and reseeds itself freely, which is why it is a standard component of Western rangeland and post-fire restoration seed mixes.

Habitat & range

Dry open ridges and slopes, sagebrush, and pinyon-juniper from the montane zone down into Great Basin scrub, roughly 5,000 to 11,000 ft in the Sierra and reaching into the White and Inyo Mountains. It is well documented on the east side around Mammoth Lakes and the Eastern Sierra; it also occurs more locally in the Lake Tahoe area.

In the garden

An easy, cheerful plant for full sun and fast-draining sandy or loamy soil; it performs poorly in clay, and overwatering shortens its life. Give it very little summer water once established. It is short-lived but self-sows readily, making a low-effort meadow, rock-garden, or slope-stabilizing plant.

Propagation

Easily from seed, improved by a few weeks of cold-moist stratification. Direct-sow in fall or early spring onto scratched, open soil with only a light covering. It reseeds on its own rather than being divided.

Where to see it near you

• iNaturalist — observed across California (map)
• Dry slopes and sagebrush of the Eastern Sierra around Mammoth, and east into the White and Inyo Mountains.

Sources

• Calscape · iNaturalist · Wikipedia
• Indigenous use: Train, P., J.R. Henrichs & W.A. Archer, Medicinal Uses of Plants by Indian Tribes of Nevada (1941).