North America Native Plant

Prairie Flax

Botanical name: Linum lewisii var. alpicola

USDA symbol: LILEA

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Linum lewisii Pursh var. saxosum Maguire & A.H. Holmgren (LILES)   

Prairie Flax: A Western Native Worth Considering for Your Garden If you’re looking to add authentic western charm to your native plant garden, prairie flax (Linum lewisii var. alpicola) might just be the delicate beauty you’ve been searching for. This perennial wildflower brings a touch of the American West’s natural ...

Rare plant alert!

Region: Conservation status by state

Status: S5T2T4: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Prairie Flax: A Western Native Worth Considering for Your Garden

If you’re looking to add authentic western charm to your native plant garden, prairie flax (Linum lewisii var. alpicola) might just be the delicate beauty you’ve been searching for. This perennial wildflower brings a touch of the American West’s natural grace to home landscapes, though it comes with some important considerations for responsible gardeners.

What Makes Prairie Flax Special?

Prairie flax is a native perennial forb—essentially a non-woody flowering plant that returns year after year. Unlike its more common relatives, this particular variety has carved out its niche in the western United States, where it grows naturally in California, Idaho, Nevada, and Utah. As a true native, it has spent centuries adapting to the unique conditions of these regions, making it a valuable addition to gardens that celebrate local ecosystems.

You might also see this plant referenced by its botanical synonym, Linum lewisii var. saxosum, in older gardening references or plant databases.

A Word of Caution: Rarity Matters

Before you rush to add prairie flax to your shopping list, there’s something important to know. This plant carries a Global Conservation Status of S5T2T4, which indicates it may face some conservation concerns in parts of its range. This doesn’t mean you can’t grow it, but it does mean you should be extra thoughtful about where you source your plants or seeds.

If you decide to grow prairie flax, always purchase from reputable native plant nurseries that use responsibly collected seeds or ethically propagated stock. Never collect seeds or plants from wild populations, as this could impact already vulnerable local populations.

Garden Design Potential

As a member of the flax family, prairie flax likely shares the delicate, airy qualities that make flax plants so appealing in naturalistic garden designs. These plants typically work beautifully in:

  • Native plant gardens celebrating western flora
  • Rock gardens or xeriscaping projects
  • Naturalistic prairie or meadow plantings
  • Wildlife habitat gardens

Growing Considerations

Since prairie flax is native to the western states, it’s naturally suited to gardens in California, Idaho, Nevada, and Utah. However, specific growing requirements for this variety aren’t widely documented, which means some experimentation may be needed.

Given its native range, prairie flax likely prefers:

  • Well-draining soils typical of western landscapes
  • Full sun to partial shade conditions
  • Minimal supplemental watering once established
  • USDA hardiness zones that align with its native range

The Bottom Line for Gardeners

Prairie flax presents an interesting opportunity for gardeners in the western United States who want to grow something truly local and special. Its perennial nature means it’s a long-term garden investment, and its native status suggests it will support local ecosystems once established.

However, the conservation concerns mean this isn’t a plant for casual gardeners or those looking for easy-to-find options. If you’re committed to native gardening and can source prairie flax responsibly, it could be a rewarding addition to your landscape. Just remember to do your homework on sourcing and consider whether other, more common native flax species might serve your garden goals just as well.

For gardeners outside the native range of California, Idaho, Nevada, and Utah, consider exploring native flax species from your own region instead. Every area has its own botanical treasures waiting to be discovered!

Prairie Flax

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Linales

Family

Linaceae DC. ex Perleb - Flax family

Genus

Linum L. - flax

Species

Linum lewisii Pursh - Lewis flax

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA