North America Native Plant

Beaver Mountain Ragwort

Botanical name: Packera castoreus

USDA symbol: PACA35

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Senecio castoreus S.L. Welsh (SECA24)   

Beaver Mountain Ragwort: A Rare Utah Mountain Treasure Worth Protecting Meet Beaver Mountain ragwort (Packera castoreus), one of Utah’s most precious and endangered wildflowers. This little-known perennial herb might not be gracing your garden anytime soon, but its story is absolutely worth telling—and its conservation status makes it a plant ...

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) ⚘

Beaver Mountain Ragwort: A Rare Utah Mountain Treasure Worth Protecting

Meet Beaver Mountain ragwort (Packera castoreus), one of Utah’s most precious and endangered wildflowers. This little-known perennial herb might not be gracing your garden anytime soon, but its story is absolutely worth telling—and its conservation status makes it a plant every native gardening enthusiast should know about.

What Makes This Plant Special

Beaver Mountain ragwort belongs to the diverse Packera genus, which includes many beloved native wildflowers across North America. As a perennial forb (that’s gardener-speak for a non-woody flowering plant), this species produces the characteristic yellow, daisy-like blooms that make ragworts so recognizable. What sets this particular species apart isn’t just its beauty—it’s its incredible rarity and the urgent need for its protection.

Where in the World Can You Find It?

Here’s where things get really interesting (and concerning): Beaver Mountain ragwort is found exclusively in Utah, making it what botanists call an endemic species. This means it exists nowhere else on Earth—Utah is its one and only home. The plant was originally classified under the scientific name Senecio castoreus before being reclassified into the Packera genus.

The Rarity Reality Check

Important Conservation Alert: Beaver Mountain ragwort carries a Global Conservation Status of S1, which translates to Critically Imperiled. This designation means the species is extremely rare, with typically five or fewer known populations and very few remaining individuals (fewer than 1,000 plants total). This is serious stuff, folks.

What does this mean for gardeners? Simply put: this plant should never be collected from the wild, and commercially sourced material is virtually non-existent. Even if you could find it, growing this species would require highly specialized conditions that are nearly impossible to replicate in typical garden settings.

Why This Plant Matters (Even If You Can’t Grow It)

While you won’t be adding Beaver Mountain ragwort to your shopping list anytime soon, understanding its ecological role helps us appreciate the intricate web of native plant communities. Like other members of the Packera family, this species likely provides:

  • Nectar and pollen for specialized high-altitude pollinators
  • Seeds for mountain-dwelling birds and small mammals
  • Habitat stability in fragile alpine ecosystems
  • Genetic diversity that could be crucial for climate adaptation

What Gardeners Can Do Instead

Since growing Beaver Mountain ragwort isn’t an option, consider these fantastic alternatives that capture the spirit of Utah’s native flora:

  • Golden ragwort (Packera aurea) – more widely available and equally stunning
  • Prairie ragwort (Packera plattensis) – drought-tolerant with gorgeous yellow blooms
  • Other native Utah wildflowers like lupines, Indian paintbrush, or native asters

Supporting Conservation Efforts

Here’s how native plant enthusiasts can help protect species like Beaver Mountain ragwort:

  • Support organizations working on Utah native plant conservation
  • Choose responsibly sourced native plants for your garden
  • Never collect plants from wild populations
  • Spread awareness about rare native species
  • Create habitat for pollinators that might also visit rare species

The Bigger Picture

Beaver Mountain ragwort reminds us that native gardening isn’t just about what we can grow—it’s about understanding and protecting the incredible diversity of plants that call our regions home. While this particular species may remain forever wild (and that’s exactly where it should stay), learning about it deepens our connection to the native plant communities we’re working to support in our own gardens.

Every time you choose a native plant for your landscape, you’re participating in a larger conservation story—one that includes critically imperiled species like Beaver Mountain ragwort and the ecosystems they depend on. Now that’s what we call gardening with purpose!

Beaver Mountain Ragwort

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Packera Á. Löve & D. Löve - ragwort

Species

Packera castoreus (S.L. Welsh) Kartesz - Beaver Mountain ragwort

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