North America Native Plant

Western Buttercup

Botanical name: Ranunculus occidentalis var. hexasepalus

USDA symbol: RAOCH2

Life cycle: perennial

Habit: forb

Native status: Native to Canada  

Synonyms: Ranunculus hexasepalus (L.D. Benson) L.D. Benson (RAHE10)   

Western Buttercup: A Rare Canadian Native Worth Protecting Meet the western buttercup (Ranunculus occidentalis var. hexasepalus), a charming yet elusive native wildflower that calls the beautiful landscapes of British Columbia home. While you might be familiar with common buttercups brightening up meadows and gardens, this particular variety is something special ...

Rare plant alert!

Region: Conservation status by state

Status: S1S3: 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) ⚘ Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘

Western Buttercup: A Rare Canadian Native Worth Protecting

Meet the western buttercup (Ranunculus occidentalis var. hexasepalus), a charming yet elusive native wildflower that calls the beautiful landscapes of British Columbia home. While you might be familiar with common buttercups brightening up meadows and gardens, this particular variety is something special – and quite rare.

What Makes This Buttercup Special?

This perennial forb belongs to the diverse buttercup family, distinguished by its unique six-sepaled flowers (hence hexasepalus). Unlike woody shrubs or trees, western buttercup is a herbaceous plant that dies back to ground level each winter, then emerges fresh each spring from its perennating buds tucked safely below the soil surface.

Also known by its scientific synonym Ranunculus hexasepalus, this plant represents the wonderful biodiversity found in Canada’s native flora.

Where Does Western Buttercup Grow?

Currently, this variety is documented as native to British Columbia, Canada. Its limited geographical distribution makes it a true regional treasure that deserves our attention and protection.

A Word of Caution: Rarity Matters

Important conservation note: Western buttercup has a Global Conservation Status of S1S3, indicating it’s considered rare to uncommon in its native range. This means we need to be extra thoughtful about how we approach growing this plant.

If you’re interested in cultivating this native beauty, please ensure you source it responsibly:

  • Purchase only from reputable native plant nurseries
  • Never collect from wild populations
  • Verify that any plants or seeds are ethically propagated
  • Consider this plant for conservation gardens or native plant preservation projects

Why Choose Native Plants Like Western Buttercup?

Supporting native plants, especially rare ones like western buttercup, offers several benefits:

  • Biodiversity support: Native plants provide food and habitat for local wildlife
  • Adaptation advantage: They’re naturally suited to local climate and soil conditions
  • Conservation impact: Growing rare natives helps preserve genetic diversity
  • Regional character: They maintain the authentic character of local landscapes

The Growing Challenge

Here’s where things get tricky – detailed cultivation information for this specific variety is quite limited. This isn’t unusual for rare native plants, as they often haven’t been extensively studied for garden use. What we do know is that as a Canadian native, it’s adapted to northern growing conditions.

If you’re determined to grow western buttercup, consider connecting with:

  • Local native plant societies in British Columbia
  • University extension programs
  • Botanical gardens with native plant expertise
  • Indigenous knowledge keepers who may have traditional growing wisdom

Alternative Native Buttercups

If you’re drawn to buttercups but want something more readily available, consider researching other native Ranunculus species in your area. Many regions have their own native buttercup varieties that might be easier to source and grow while still providing the ecological benefits you’re seeking.

The Bottom Line

Western buttercup represents the fascinating diversity hiding within our native plant communities. While it may not be the easiest plant to grow due to its rarity and limited cultivation information, it serves as an important reminder of why protecting and preserving our native flora matters.

Whether you choose to seek out this particular variety or simply appreciate it from afar, remember that every rare native plant tells a story about the unique ecosystems that make our landscapes special. Sometimes the most valuable garden additions are the ones that connect us to the wild places we’re working to protect.

Western Buttercup

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Magnoliidae

Order

Ranunculales

Family

Ranunculaceae Juss. - Buttercup family

Genus

Ranunculus L. - buttercup

Species

Ranunculus occidentalis Nutt. - western buttercup

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