North America Native Plant

Snake River Twinpod

Botanical name: Physaria integrifolia

USDA symbol: PHIN19

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Snake River Twinpod: A Tough Little Native Worth Getting to Know If you’re looking for a hardy native plant that can handle whatever Mother Nature throws at it, let me introduce you to Snake River twinpod (Physaria integrifolia). This unassuming little perennial might not win any flashy flower contests, but ...

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 ⚘

Snake River Twinpod: A Tough Little Native Worth Getting to Know

If you’re looking for a hardy native plant that can handle whatever Mother Nature throws at it, let me introduce you to Snake River twinpod (Physaria integrifolia). This unassuming little perennial might not win any flashy flower contests, but it’s got character in spades and a resume that’ll make any drought-stressed gardener swoon.

What Exactly Is Snake River Twinpod?

Snake River twinpod is a native perennial forb – basically a non-woody plant that comes back year after year. Don’t let the forb label fool you into thinking it’s boring; this tough little customer has been holding its own in the challenging landscapes of Idaho, Montana, and Wyoming for ages. It’s what botanists call a true survivor.

Why Your Garden Might Want to Meet This Plant

Here’s where Snake River twinpod really shines: it’s practically bulletproof once established. This plant thrives in conditions that would make other garden favorites throw in the towel. We’re talking full sun, well-drained soils, and minimal water – perfect for those of us trying to create more sustainable, water-wise landscapes.

In spring, this low-growing charmer produces clusters of small yellow flowers that local bees and other pollinators absolutely love. The silvery-green foliage forms attractive cushions or mats, making it an excellent groundcover option for rock gardens or alpine-style plantings.

Where Does It Fit in Your Garden?

Snake River twinpod is happiest in:

  • Rock gardens where drainage is excellent
  • Alpine or mountain-style landscapes
  • Native plant gardens showcasing regional flora
  • Drought-tolerant landscape designs
  • Areas with poor, alkaline soils where other plants struggle

This plant works beautifully as a groundcover in challenging spots or as part of a native plant community. It’s particularly suited for gardeners in USDA hardiness zones 4-7 who want to support local ecosystems.

Growing Snake River Twinpod Successfully

The secret to success with this plant is simple: think mountain meadow, not English cottage garden. Here’s what it needs:

Light: Full sun is non-negotiable. This plant has adapted to wide-open spaces and needs all the light it can get.

Soil: Well-drained is the key phrase here. If water sits around the roots, you’ll lose your plant faster than you can say root rot. Alkaline soils are preferred, but it’s fairly adaptable.

Water: Once established, this plant is remarkably drought tolerant. In fact, overwatering is probably the fastest way to kill it. Water sparingly, if at all, after the first growing season.

A Word About Conservation

Here’s something important to know: Snake River twinpod has a conservation status that indicates some level of concern about its populations in the wild. While it’s not critically endangered, it’s not exactly common either. If you decide to add this plant to your garden, please make sure you’re getting it from a reputable native plant nursery that grows their stock rather than wild-collecting it. We want to enjoy these plants in our gardens AND keep them thriving in their natural habitats.

The Bottom Line

Snake River twinpod might not be the showiest plant in the native plant world, but it’s got qualities that make it worth considering: it’s tough, drought-tolerant, pollinator-friendly, and perfectly adapted to challenging growing conditions. If you’re gardening in its native range and looking for a low-maintenance groundcover that supports local wildlife, this little survivor could be exactly what your landscape needs.

Just remember: excellent drainage, minimal fussing, and responsibly sourced plants. Give it those basics, and Snake River twinpod will reward you with years of quiet, steady performance – sometimes the best kind of garden companion there is.

Snake River Twinpod

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Capparales

Family

Brassicaceae Burnett - Mustard family

Genus

Physaria (Nutt. ex Torr. & A. Gray) A. Gray - twinpod

Species

Physaria integrifolia (Rollins) Lichvar - Snake River twinpod

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