North America Native Plant

Grimes’ Pea

Botanical name: Lathyrus grimesii

USDA symbol: LAGR9

Life cycle: perennial

Habit: vine

Native status: Native to the lower 48 states  

Grimes’ Pea: A Rare Nevada Native Worth Protecting Meet Grimes’ pea (Lathyrus grimesii), one of Nevada’s most precious botanical treasures. This delicate perennial herb might not be the showiest plant in the garden world, but it holds a special place in the hearts of native plant enthusiasts and conservationists alike. ...

Rare plant alert!

Region: Conservation status by state

Status: S2: Status is uncertain but is somewhere between the following rankings: Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘

Grimes’ Pea: A Rare Nevada Native Worth Protecting

Meet Grimes’ pea (Lathyrus grimesii), one of Nevada’s most precious botanical treasures. This delicate perennial herb might not be the showiest plant in the garden world, but it holds a special place in the hearts of native plant enthusiasts and conservationists alike. If you’re wondering whether you should add this rare beauty to your garden, the answer is both yes and no – let me explain why.

What Makes Grimes’ Pea Special?

Grimes’ pea is a perennial forb, which simply means it’s a soft-stemmed plant (not woody like a shrub) that comes back year after year. As a member of the pea family, it likely produces small, charming flowers that resemble tiny sweet peas, probably in shades of pink or purple that would make any gardener’s heart skip a beat.

Where Does It Call Home?

This little gem is what botanists call an endemic species – it’s found naturally only in Nevada and nowhere else on Earth. Talk about exclusive! Lathyrus grimesii has made the Silver State its one and only home, which makes it incredibly special but also incredibly vulnerable.

The Rarity Reality Check

Here’s where things get serious, folks. Grimes’ pea has a Global Conservation Status of S2, which means it’s considered Imperiled. In plain English? This plant is in trouble. With typically only 6 to 20 known locations and somewhere between 1,000 to 3,000 individual plants remaining in the wild, every single specimen is precious.

What does this mean for you as a gardener? If you’re lucky enough to find seeds or plants available, make absolutely sure they’re from a reputable, ethical source that’s working with proper permits and conservation protocols. Never, ever collect from the wild – that could push this species closer to extinction.

Should You Grow Grimes’ Pea?

The short answer: only if you can source it responsibly and you’re committed to conservation gardening. This isn’t a plant for casual gardeners looking for easy color. Instead, it’s perfect for:

  • Dedicated native plant enthusiasts
  • Conservation-minded gardeners
  • Specialized rock or alpine gardens
  • Educational or botanical garden settings

Growing Conditions and Care

While specific growing requirements for Grimes’ pea aren’t well-documented (another sign of its rarity!), we can make educated guesses based on its Nevada mountain habitat:

  • Hardiness: Likely suitable for USDA zones 4-7
  • Soil: Well-draining, possibly rocky or sandy soils
  • Water: Drought-tolerant once established, typical of Nevada natives
  • Sun: Probably prefers full sun to partial shade
  • Climate: Adapted to arid mountain conditions with cold winters

Benefits for Wildlife

Like its pea family cousins, Grimes’ pea likely provides valuable nectar for native pollinators, especially native bees and butterflies. Every rare plant that supports pollinators is worth its weight in gold – or in this case, worth its weight in conservation efforts!

The Bottom Line

Grimes’ pea represents something bigger than just another pretty plant for your garden. It’s a reminder of how fragile our native ecosystems can be and how important it is to protect what we have left. If you’re passionate about conservation and can source this plant ethically, growing it could be your small contribution to keeping this species from disappearing forever.

But if you’re simply looking for native Nevada plants for your landscape, consider exploring other native options that aren’t imperiled. Your local native plant society can point you toward beautiful, conservation-friendly alternatives that will give you that native plant satisfaction without the ethical concerns.

Remember: every plant in your garden is a choice. Make it count!

Grimes’ Pea

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

Lathyrus L. - pea

Species

Lathyrus grimesii Barneby - Grimes' pea

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