North America Native Plant

Graham’s Twinpod

Botanical name: Physaria grahamii

USDA symbol: PHGR8

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Graham’s Twinpod: A Rare Utah Native Worth Protecting Meet Graham’s twinpod (Physaria grahamii), a charming little perennial that’s about as exclusive as native plants get. This rare Utah endemic is definitely not your run-of-the-mill garden center find, and there’s a very good reason for that. What Makes Graham’s Twinpod Special ...

Rare plant alert!

Region: Conservation status by state

Status: S1Q: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘

Graham’s Twinpod: A Rare Utah Native Worth Protecting

Meet Graham’s twinpod (Physaria grahamii), a charming little perennial that’s about as exclusive as native plants get. This rare Utah endemic is definitely not your run-of-the-mill garden center find, and there’s a very good reason for that.

What Makes Graham’s Twinpod Special

Graham’s twinpod is a low-growing forb – that’s botanist speak for a herbaceous plant that isn’t a grass or sedge. Think of it as nature’s own ground-hugging cushion, perfect for those who appreciate plants that know how to stay put and look good doing it.

This perennial produces clusters of bright yellow flowers in spring, creating a cheerful display against its compact, silvery-green foliage. The flowers are typical of the mustard family – small but mighty, and absolutely beloved by native pollinators.

Where Graham’s Twinpod Calls Home

Here’s where things get interesting (and a bit concerning): Graham’s twinpod is found only in Utah. We’re talking about a true endemic species that has made this single state its entire world. This extremely limited geographic distribution is part of what makes this plant so special – and so vulnerable.

A Word of Caution: Rarity Matters

Before you start dreaming about adding this beauty to your garden, there’s something important you need to know. Graham’s twinpod has a Global Conservation Status of S1Q, which essentially means it’s rare enough that scientists are still figuring out just how rare it is. This isn’t a plant you should casually collect from the wild or purchase from questionable sources.

If you’re absolutely determined to grow Graham’s twinpod, please – and we cannot stress this enough – only obtain plants or seeds from reputable native plant nurseries that can verify their stock comes from ethical, sustainable sources. Better yet, consider supporting conservation efforts for this species instead.

Growing Graham’s Twinpod (If You Can Source It Responsibly)

Should you manage to find ethically sourced Graham’s twinpod, you’ll need to recreate a slice of Utah’s high desert environment. This plant didn’t evolve to be easy-going about its living conditions.

Growing Conditions

  • Full sun exposure – this plant loves to bask
  • Well-draining, sandy or rocky soil (clay is its enemy)
  • Low water requirements – think desert, not rainforest
  • USDA Hardiness Zones 4-8
  • Excellent drainage is absolutely critical

Care Tips

  • Plant in raised beds or rock gardens for improved drainage
  • Water sparingly and only during extended dry periods
  • Avoid overhead watering – wet foliage can lead to problems
  • Mulch with gravel or small stones rather than organic matter
  • Provide protection from excessive winter moisture

Garden Design Ideas

Graham’s twinpod is perfect for specialized garden settings where its unique requirements can be met:

  • Alpine and rock gardens
  • Xeriscape installations
  • Native plant demonstration gardens
  • Conservation-focused landscapes

Its low, cushion-like growth habit makes it an excellent choice for tucking between rocks or using as a living mulch around other drought-tolerant natives.

Wildlife and Pollinator Benefits

Despite its small stature, Graham’s twinpod punches above its weight when it comes to supporting native wildlife. Its spring flowers provide nectar for small native bees and other pollinators, while its seeds may feed small birds and rodents. Every rare native plant plays a crucial role in its ecosystem, no matter how tiny.

The Bottom Line

Graham’s twinpod is undeniably fascinating, but it’s not for everyone. This is a plant for serious native plant enthusiasts who understand the responsibility that comes with growing rare species. If you’re new to native gardening, consider starting with more common Utah natives that can provide similar aesthetic appeal without the conservation concerns.

Remember, sometimes the best way to appreciate a rare plant is to support its conservation in the wild rather than trying to bring it into our gardens. Graham’s twinpod serves as a beautiful reminder that some of nature’s treasures are worth protecting exactly where they are.

Graham’s 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 grahamii Morton - Graham's twinpod

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