North America Native Plant

Lobb’s Buttercup

Botanical name: Ranunculus lobbii

USDA symbol: RALO

Life cycle: annual

Habit: forb

Native status: Native to Canada âš˜ Native to the lower 48 states  

Synonyms: Ranunculus aquatilis L. var. lobbii (Hiern.) S. Watson (RAAQL)   

Lobb’s Buttercup: A Delicate Native for Your Water Garden If you’ve ever dreamed of creating a authentic wetland habitat in your garden, meet Lobb’s buttercup (Ranunculus lobbii) – a charming little native that’s perfectly at home with wet feet. This delicate annual forb might not be the showiest plant in ...

Lobb’s Buttercup: A Delicate Native for Your Water Garden

If you’ve ever dreamed of creating a authentic wetland habitat in your garden, meet Lobb’s buttercup (Ranunculus lobbii) – a charming little native that’s perfectly at home with wet feet. This delicate annual forb might not be the showiest plant in the garden center, but it plays an important role in Pacific Coast wetland ecosystems and can add authentic native charm to water features.

What Is Lobb’s Buttercup?

Lobb’s buttercup is a small, unassuming member of the buttercup family that’s specially adapted for life in and around water. As an annual forb (that’s garden-speak for a non-woody flowering plant), it completes its entire life cycle in one growing season, producing delicate white, five-petaled flowers that seem to float just above the water’s surface.

Unlike its more familiar yellow-flowered cousins, this species has evolved specifically for wetland conditions. You might also see it listed under its botanical synonym, Ranunculus aquatilis var. lobbii, in older plant references.

Where Does It Come From?

This Pacific Coast native calls the wetlands of British Columbia, California, and Oregon home. As a true native species to both Canada and the United States, it’s perfectly adapted to the climate patterns and seasonal rhythms of the Pacific Northwest and California’s coastal regions.

Why Grow Lobb’s Buttercup?

Here’s the thing about Lobb’s buttercup – it’s not for every garden or every gardener. But if you’re creating a native wetland habitat, restoring a pond area, or developing a specialized water garden, this little plant is pure gold. Here’s why:

  • Authentic native habitat: Perfect for wetland restoration projects and native plant gardens
  • Specialized niche: Fills the important ecological role of an obligate wetland species
  • Pollinator support: Small flowers attract flies, gnats, and tiny native bees
  • Low maintenance: Once established in suitable conditions, it largely takes care of itself

The Challenges (Let’s Be Honest)

Lobb’s buttercup isn’t your typical garden plant, and it comes with some specific requirements that might not work for every situation:

  • Water dependency: This plant absolutely requires constantly wet or saturated soil – it’s classified as an obligate wetland species
  • Annual nature: You’ll need to replant or allow self-seeding each year
  • Specialized habitat: Won’t thrive in typical garden borders or containers
  • Limited availability: May be difficult to find at regular nurseries

Growing Conditions

If you’re still interested (and have the right conditions), here’s what Lobb’s buttercup needs to thrive:

  • Water: Constantly moist to saturated soil, or shallow standing water
  • Light: Full sun to partial shade
  • Soil: Any soil type, as long as it stays wet
  • Climate: USDA hardiness zones 8-10
  • Habitat: Pond margins, seasonal pools, bog gardens, or wetland restoration areas

Planting and Care Tips

Growing Lobb’s buttercup successfully is all about mimicking its natural wetland habitat:

  • Timing: Direct seed in fall when natural rains begin
  • Location: Choose areas that stay consistently wet year-round
  • Seeding: Scatter seeds directly on saturated soil surface
  • Water management: Maintain consistent moisture – never let the soil dry out
  • Companion planting: Pair with other native wetland species like sedges and rushes

Is Lobb’s Buttercup Right for Your Garden?

This native beauty is perfect for you if you’re working on wetland restoration, have a natural or constructed pond, or are passionate about creating authentic native habitats. It’s not the right choice if you’re looking for a low-water garden plant or something for typical flower beds.

If you don’t have suitable wetland conditions but love the idea of native buttercups, consider other regional native Ranunculus species that might be better adapted to your specific growing conditions.

Remember, growing native plants like Lobb’s buttercup isn’t just about adding pretty flowers to your garden – it’s about creating habitat, supporting local ecosystems, and preserving the natural heritage of your region. Sometimes the most rewarding plants are the ones that challenge us to garden a little differently.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Arid West

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Western Mountains, Valleys, and Coast

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Lobb’s 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 lobbii (Hiern.) A. Gray - Lobb's buttercup

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