North America Native Plant

Sacajawea Bitter Root

Botanical name: Lewisia sacajaweana

USDA symbol: LESA17

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Sacajawea Bitter Root: A Rare Idaho Native Worth Protecting Meet one of Idaho’s most precious floral gems – the Sacajawea bitter root (Lewisia sacajaweana). This delicate perennial might not be on every gardener’s wish list, but it certainly deserves our attention and respect. Named after the famous Shoshone guide who ...

Rare plant alert!

Region: Conservation status by state

Status: S1: Status is uncertain but is somewhere between the following rankings: Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘

Sacajawea Bitter Root: A Rare Idaho Native Worth Protecting

Meet one of Idaho’s most precious floral gems – the Sacajawea bitter root (Lewisia sacajaweana). This delicate perennial might not be on every gardener’s wish list, but it certainly deserves our attention and respect. Named after the famous Shoshone guide who helped Lewis and Clark, this little beauty carries both botanical significance and a conservation story that every native plant enthusiast should know.

What Makes Sacajawea Bitter Root Special?

Sacajawea bitter root is a charming forb – essentially a non-woody perennial that forms attractive rosettes of succulent-like leaves. During its blooming period, it produces delicate pink to white flowers that seem almost too precious for this world. And in a way, they are – this plant is critically imperiled, making it one of Idaho’s rarest botanical treasures.

As a member of the Lewisia genus, this plant shares DNA with other bitter roots, but Lewisia sacajaweana has carved out its own unique niche in the plant kingdom. It’s a true Idaho endemic, meaning you won’t find it growing wild anywhere else on Earth.

Where Does It Call Home?

The entire global population of Sacajawea bitter root exists within Idaho’s borders. This incredible plant has chosen some pretty specific real estate in central Idaho, where it clings to life in specialized habitats that provide just the right conditions for its survival.

The Conservation Reality Check

Here’s where things get serious, fellow gardeners. Sacajawea bitter root carries a Global Conservation Status of S1, which translates to Critically Imperiled. This means there are typically only five or fewer known populations, with very few individual plants remaining – we’re talking fewer than 1,000 plants in the entire world.

What does this mean for gardeners? If you’re considering adding this beauty to your collection, you absolutely must ensure any plant material comes from responsible, ethical sources – never from wild collection. Better yet, consider supporting conservation efforts for this species rather than trying to grow it yourself.

Growing Conditions and Care

Should you manage to obtain ethically sourced Sacajawea bitter root, here’s what this finicky little plant demands:

  • Drainage, drainage, drainage: This cannot be overstated. Poor drainage is the kiss of death for Lewisias
  • Rocky or sandy soil: Think mountain scree or alpine conditions
  • Partial shade to full sun: It appreciates some protection during the hottest part of the day
  • Cool, dry winters: This plant needs its beauty sleep during dormancy
  • USDA Zones 4-7: It needs those chilly winters to thrive

Garden Role and Design Ideas

If you’re lucky enough to grow Sacajawea bitter root responsibly, it shines brightest in:

  • Specialized rock gardens that mimic alpine conditions
  • Native plant collections focused on rare species conservation
  • Educational gardens that tell conservation stories
  • Alpine or scree gardens with excellent drainage

This isn’t a plant for the average perennial border or mixed landscape. It’s a specialist that requires specialist conditions and specialist care.

Pollinator and Wildlife Benefits

When in bloom, Sacajawea bitter root provides nectar for small native bees and other tiny pollinators. Its flowers may be small, but they’re perfectly sized for Idaho’s native pollinator community. Every bloom counts when you’re talking about a plant this rare.

The Bottom Line for Gardeners

Should you plant Sacajawea bitter root? The honest answer is: probably not, unless you’re a serious native plant conservationist with the proper expertise and ethically sourced plants. This isn’t about gardening restrictions – it’s about plant conservation.

Instead, consider supporting conservation organizations working to protect Idaho’s rare plants, or choose other beautiful native Lewisia species that aren’t critically imperiled. Sometimes the best way to love a plant is to leave it be and work to protect its wild habitat.

If you do choose to grow this rare beauty, remember that you’re not just tending a garden – you’re participating in conservation. Make sure your plants come from legitimate nursery propagation, never wild collection, and consider sharing seeds or divisions with other serious conservationists to help build a responsible cultivation network.

After all, future generations of gardeners deserve the chance to marvel at Sacajawea bitter root, just as we do today.

Sacajawea Bitter Root

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Caryophyllales

Family

Portulacaceae Dumort. - Purslane family

Genus

Lewisia Pursh - lewisia

Species

Lewisia sacajaweana B.L. Wilson & E. Rey-Vizg. - Sacajawea bitter root

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