North America Native Plant

Sampson’s Snakeroot

Botanical name: Orbexilum pedunculatum

USDA symbol: ORPE

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Sampson’s Snakeroot: A Hidden Gem for Native Plant Enthusiasts If you’re looking to add a touch of native charm to your garden while supporting local pollinators, let me introduce you to a delightful little wildflower that might just become your new favorite: Sampson’s snakeroot (Orbexilum pedunculatum). This perennial native has ...

Sampson’s Snakeroot: A Hidden Gem for Native Plant Enthusiasts

If you’re looking to add a touch of native charm to your garden while supporting local pollinators, let me introduce you to a delightful little wildflower that might just become your new favorite: Sampson’s snakeroot (Orbexilum pedunculatum). This perennial native has been quietly beautifying American landscapes for centuries, and it’s about time more gardeners discovered its many virtues.

What Makes Sampson’s Snakeroot Special?

Sampson’s snakeroot is a true American native, naturally occurring across an impressive 20 states from the Atlantic Coast to the Great Plains. You’ll find this hardy perennial growing wild from Alabama up to Michigan, and from Florida across to Kansas and Texas. It’s particularly at home in the eastern and central United States, where it has been supporting native ecosystems for thousands of years.

As a member of the pea family, this charming forb (that’s botanist-speak for a non-woody flowering plant) produces clusters of small, purple to violet flowers that are absolutely irresistible to native pollinators. The compound leaves, typically featuring 3-5 leaflets, create an attractive backdrop for the delicate blooms throughout the growing season.

Why Your Garden Needs This Native Beauty

There are several compelling reasons to consider adding Sampson’s snakeroot to your landscape:

  • Pollinator magnet: Native bees, butterflies, and other beneficial insects flock to its nectar-rich flowers
  • Low maintenance: Once established, it’s remarkably drought tolerant and requires minimal care
  • Authentic native appeal: Adds genuine local character to woodland and prairie gardens
  • Versatile placement: Thrives in both partial shade and full sun conditions
  • Hardy performer: Suitable for USDA hardiness zones 4-8

Perfect Garden Companions and Settings

Sampson’s snakeroot shines in naturalized settings where it can spread and mingle with other native plants. It’s particularly well-suited for:

  • Woodland gardens as an understory wildflower
  • Prairie restoration projects
  • Native plant borders
  • Wildlife habitat gardens
  • Low-maintenance naturalized areas

The plant’s facultative upland status means it typically prefers well-drained, non-wetland conditions but can adapt to occasional moisture, making it quite flexible in various garden situations.

Growing Sampson’s Snakeroot Successfully

The good news is that this native wildflower is refreshingly easy to grow once you understand its preferences:

Site Selection

Choose a location with well-drained soil and anywhere from partial shade to full sun. While it can tolerate various light conditions, it tends to perform best with at least some direct sunlight during the day.

Planting Tips

Fall seeding works best for Sampson’s snakeroot, as the seeds benefit from natural cold stratification over winter. Direct sow seeds in your chosen location and be patient – this perennial can take 2-3 years to produce its first flowers from seed, but it’s worth the wait!

Care and Maintenance

Once established, Sampson’s snakeroot is beautifully low-maintenance. It’s quite drought tolerant, so you won’t need to fuss with frequent watering. In fact, too much moisture can be problematic, so well-drained soil is key to long-term success.

A Word About Patience

Like many native perennials, Sampson’s snakeroot follows the old gardener’s wisdom: First year it sleeps, second year it creeps, third year it leaps. Don’t be discouraged if your newly planted seeds don’t show much action in their first growing season – they’re busy establishing strong root systems that will support years of beautiful blooms.

The Bottom Line

Sampson’s snakeroot may not be the showiest plant in your garden, but it’s exactly the kind of reliable, beneficial native that forms the backbone of healthy, sustainable landscapes. By choosing this authentic American wildflower, you’re not just adding beauty to your garden – you’re participating in the conservation of our native plant heritage and providing crucial support for local pollinators.

Whether you’re creating a woodland sanctuary, restoring a prairie, or simply want to add some native character to your landscape, Sampson’s snakeroot deserves serious consideration. It’s proof that sometimes the most valuable garden additions are the quiet, steady performers that have been perfecting their craft for millennia.

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

Atlantic and Gulf Coastal Plain

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Eastern Mountains and Piedmont

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Great Plains

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Midwest

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Northcentral & Northeast

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Sampson’s Snakeroot

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

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Orbexilum Raf. - leather-root

Species

Orbexilum pedunculatum (Mill.) Rydb. - Sampson's snakeroot

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