North America Non-native Plant

Solidstem Burnet Saxifrage

Botanical name: Pimpinella saxifraga nigra

USDA symbol: PISAN

Life cycle: perennial

Habit: forb

Native status: Non-native, reproduces and persists in the wild in the lower 48 states  

Solidstem Burnet Saxifrage: A Mysterious Garden Visitor If you’ve stumbled across the name solidstem burnet saxifrage in your plant research, you’re probably scratching your head—and for good reason! This perennial forb presents something of a botanical puzzle that’s worth unraveling before you make any planting decisions. What We Know (And ...

Solidstem Burnet Saxifrage: A Mysterious Garden Visitor

If you’ve stumbled across the name solidstem burnet saxifrage in your plant research, you’re probably scratching your head—and for good reason! This perennial forb presents something of a botanical puzzle that’s worth unraveling before you make any planting decisions.

What We Know (And What We Don’t)

Solidstem burnet saxifrage is classified as a non-native perennial that has established itself in Washington state. As a forb, it’s an herbaceous plant without woody stems—think of it as your typical garden perennial that dies back to the ground each winter and returns the following spring.

Here’s where things get interesting (and a bit frustrating): despite its intriguing common name, reliable information about this particular plant is surprisingly scarce. We know it’s non-native and has naturalized in Washington, but details about its appearance, growing habits, and garden performance remain elusive.

Geographic Distribution

Currently, solidstem burnet saxifrage is documented only in Washington state within the United States. This limited distribution might explain why so little information is readily available about the plant.

The Garden Dilemma

Without clear information about this plant’s invasive potential, growth habits, or ornamental value, it’s difficult to recommend it for home gardens. While it’s not listed as invasive or noxious, the lack of comprehensive data raises some red flags for conscientious gardeners.

Here’s what we’re missing:

  • Mature size and growth rate
  • Flower appearance and blooming period
  • Preferred growing conditions
  • Wildlife and pollinator benefits
  • Potential for aggressive spreading

A Better Path Forward

Rather than gambling with an unknown quantity, Washington gardeners have access to fantastic native alternatives that offer reliable performance and ecological benefits. Consider these Pacific Northwest natives instead:

  • Western columbine (Aquilegia formosa) – Beautiful blue and red flowers
  • Wild ginger (Asarum caudatum) – Excellent groundcover for shady spots
  • Coral bells (Heuchera micrantha) – Attractive foliage and delicate flower spikes
  • Western bleeding heart (Dicentra formosa) – Charming heart-shaped flowers

The Bottom Line

Sometimes in gardening, mystery doesn’t equal excitement—it equals uncertainty. While solidstem burnet saxifrage might be perfectly harmless, the lack of available information makes it a risky choice for your garden investment.

Instead, why not explore the wealth of well-documented native plants that will definitely thrive in Washington’s climate while supporting local ecosystems? Your garden (and local wildlife) will thank you for choosing plants with proven track records and clear ecological benefits.

If you’re absolutely determined to learn more about this mysterious plant, consider reaching out to your local extension office or native plant society—they might have additional insights into this elusive species.

Solidstem Burnet Saxifrage

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

Apiales

Family

Apiaceae Lindl. - Carrot family

Genus

Pimpinella L. - burnet saxifrage

Species

Pimpinella saxifraga L. - solidstem burnet saxifrage

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