North America Native Plant

Sierra Fumewort

Botanical name: Corydalis caseana caseana

USDA symbol: COCAC7

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Corydalis bidwelliae S. Watson (COBI8)   

Sierra Fumewort: A Delicate Native Treasure for California Gardens If you’re looking to add a touch of ethereal beauty to your California garden while supporting native biodiversity, Sierra fumewort might just be the perfect choice. This charming perennial brings delicate flowers and graceful foliage to shaded corners where many plants ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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. ⚘ 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. ⚘

Sierra Fumewort: A Delicate Native Treasure for California Gardens

If you’re looking to add a touch of ethereal beauty to your California garden while supporting native biodiversity, Sierra fumewort might just be the perfect choice. This charming perennial brings delicate flowers and graceful foliage to shaded corners where many plants struggle to thrive.

What is Sierra Fumewort?

Sierra fumewort (Corydalis caseana caseana) is a native California perennial that belongs to the fumitory family. This lovely forb – that’s botanist-speak for a non-woody flowering plant – produces clusters of tubular flowers that seem to dance above finely divided, fern-like foliage. You might also see it listed under its botanical synonym, Corydalis bidwelliae, in older gardening references.

Where Does Sierra Fumewort Grow Naturally?

This plant is a true California native, naturally occurring throughout the state’s diverse landscapes. As its common name suggests, it has a particular affinity for the Sierra Nevada region, where it has adapted to the cool, moist conditions of mountain woodlands and forest edges.

Why Consider Sierra Fumewort for Your Garden?

Sierra fumewort offers several compelling reasons to earn a spot in your landscape:

  • Native plant benefits: Supporting local ecosystems and requiring less water once established
  • Pollinator magnet: The tubular flowers attract native bees and butterflies
  • Shade tolerance: Perfect for those tricky spots where sun-loving plants won’t cooperate
  • Low maintenance: Once settled, this perennial is fairly self-sufficient
  • Unique beauty: Delicate pink to purple blooms add an enchanting woodland feel

A Word About Rarity

Before you rush to plant Sierra fumewort, it’s important to know that this species has a conservation status that warrants attention. If you choose to grow this plant, please ensure you source it from reputable native plant nurseries that propagate their stock responsibly rather than collecting from wild populations.

Growing Conditions and Care

Sierra fumewort thrives in conditions that mimic its natural mountain habitat:

  • Light: Partial to full shade – think dappled sunlight filtering through trees
  • Soil: Moist but well-draining soil enriched with organic matter
  • Water: Consistent moisture, especially during the growing season
  • Climate: Suitable for USDA hardiness zones 5-8, preferring cooler temperatures

Perfect Garden Settings

Sierra fumewort shines in several garden contexts:

  • Woodland gardens alongside ferns and other shade-loving natives
  • Native plant gardens focused on California flora
  • Shaded perennial borders where it can naturalize
  • Cool, moist spots where other plants struggle

Planting and Care Tips

Getting Sierra fumewort established successfully requires attention to a few key details:

  • Plant in spring or fall when temperatures are moderate
  • Amend heavy clay soils with compost to improve drainage
  • Mulch around plants to retain soil moisture and suppress weeds
  • Protect from hot afternoon sun, especially in warmer regions
  • Allow soil to remain consistently moist but never waterlogged

Supporting Wildlife

By choosing Sierra fumewort, you’re not just beautifying your garden – you’re creating habitat for California’s native pollinators. The tubular flowers are particularly attractive to native bees and butterflies, making this plant a valuable addition to any pollinator-friendly landscape.

The Bottom Line

Sierra fumewort is a wonderful choice for gardeners who appreciate subtle beauty and want to support native California ecosystems. While its rarity means you’ll need to source it carefully, the reward is a unique and ecologically valuable addition to your shade garden. Just remember to provide the cool, moist conditions it craves, and this charming native will reward you with years of delicate blooms and graceful foliage.

Sierra Fumewort

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

Papaverales

Family

Fumariaceae Marquis - Fumitory family

Genus

Corydalis DC. - fumewort

Species

Corydalis caseana A. Gray - Sierra fumewort

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