North America Native Plant

Arrowleaf Rattlesnakeroot

Botanical name: Prenanthes sagittata

USDA symbol: PRSA

Life cycle: perennial

Habit: forb

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

Synonyms: Prenanthes alata (Hook.) D. Dietr. var. sagittata A. Gray (PRALS)   

Arrowleaf Rattlesnakeroot: A Rare Native Wildflower Worth Knowing Meet arrowleaf rattlesnakeroot (Prenanthes sagittata), a lesser-known native wildflower that deserves a spot on every native plant enthusiast’s radar. This perennial forb might not be the showiest plant in your garden, but it represents the kind of botanical diversity that makes North ...

Rare plant alert!

Region: Conservation status by state

Status: S3S4: Status is uncertain but is somewhere between the following rankings: 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 ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

Arrowleaf Rattlesnakeroot: A Rare Native Wildflower Worth Knowing

Meet arrowleaf rattlesnakeroot (Prenanthes sagittata), a lesser-known native wildflower that deserves a spot on every native plant enthusiast’s radar. This perennial forb might not be the showiest plant in your garden, but it represents the kind of botanical diversity that makes North American ecosystems so special.

What Makes This Plant Special

Arrowleaf rattlesnakeroot belongs to the fascinating world of native wildflowers that have quietly thrived in North America for thousands of years. As a perennial forb, it lacks the woody stems of shrubs and trees but returns year after year, adding subtle beauty and ecological value to natural landscapes.

The plant gets its intriguing common name from its arrow-shaped leaves and its membership in a group of plants historically used in folk medicine. Don’t let the rattlesnakeroot part worry you – it’s perfectly harmless and refers to traditional medicinal uses rather than any connection to actual snakes!

Where You’ll Find It Growing Wild

This native beauty calls the northern regions of North America home, naturally occurring in Alberta, British Columbia, Idaho, and Montana. It’s adapted to the cooler climates and specific growing conditions found in these areas, making it a true northern native.

A Word About Rarity

Here’s something important every gardener should know: arrowleaf rattlesnakeroot has a Global Conservation Status of S3S4, which indicates some level of concern about its population stability. This means the plant is uncommon enough that we need to be thoughtful about how we interact with it.

If you’re interested in growing this species, please only source it from reputable native plant nurseries that grow their stock rather than wild-collecting. Never harvest seeds or plants from wild populations – these rare natives need every individual they can get!

Should You Grow Arrowleaf Rattlesnakeroot?

This plant is perfect for gardeners who:

  • Live within its natural range (northern U.S. and southern Canada)
  • Want to support native biodiversity
  • Appreciate subtle, naturalistic garden beauty
  • Are committed to responsible native plant gardening

However, because specific growing requirements and care instructions for this particular species are not well-documented, it might be challenging for beginning native plant gardeners. If you’re new to native gardening, consider starting with more common and well-studied native wildflowers in your area.

The Bottom Line

Arrowleaf rattlesnakeroot represents the kind of plant that makes native gardening so rewarding – it connects us to the natural heritage of our regions while supporting local ecosystems. While we don’t have detailed cultivation guides for this specific species, its rarity makes it all the more precious.

If you’re lucky enough to encounter this plant in the wild, take a moment to appreciate its quiet presence. And if you’re determined to grow it, work with native plant experts in your area who might have experience with this uncommon beauty. Sometimes the most rewarding plants are the ones that challenge us to become better, more thoughtful gardeners.

Arrowleaf Rattlesnakeroot

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Prenanthes L. - rattlesnakeroot

Species

Prenanthes sagittata (A. Gray) A. Nelson - arrowleaf rattlesnakeroot

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