North America Native Plant

Matthews’ Buckwheat

Botanical name: Eriogonum thompsoniae var. matthewsiae

USDA symbol: ERTHM

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Eriogonum corymbosum Benth. var. matthewsiae Reveal (ERCOM)   

Matthews’ Buckwheat: A Rare Utah Native Perfect for Dry Gardens If you’re looking for a hardy, drought-tolerant native plant that won’t quit on you during those scorching summer months, Matthews’ buckwheat might just be your new garden hero. This charming Utah native has been quietly thriving in the rocky landscapes ...

Rare plant alert!

Region: Conservation status by state

Status: S4T1?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ Subspecies or variety is 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) ⚘ 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 ⚘

Matthews’ Buckwheat: A Rare Utah Native Perfect for Dry Gardens

If you’re looking for a hardy, drought-tolerant native plant that won’t quit on you during those scorching summer months, Matthews’ buckwheat might just be your new garden hero. This charming Utah native has been quietly thriving in the rocky landscapes of the Colorado Plateau for centuries, and it’s ready to bring that same resilience to your garden.

What Makes Matthews’ Buckwheat Special?

Matthews’ buckwheat (Eriogonum thompsoniae var. matthewsiae) is a perennial forb that belongs to the extensive buckwheat family. Don’t let the forb classification intimidate you—it simply means this plant is a non-woody flowering plant that dies back to the ground each winter and returns with vigor each spring.

This particular variety is sometimes known by its scientific synonym, Eriogonum corymbosum var. matthewsiae, but regardless of what you call it, this little powerhouse packs a lot of charm into its compact frame.

Where It Calls Home

Matthews’ buckwheat is a true Utah native, found exclusively in the Beehive State. This plant has adapted perfectly to the challenging conditions of Utah’s high desert regions, making it an excellent choice for gardeners dealing with similar harsh, dry conditions.

A Word About Rarity

Here’s something important to know: Matthews’ buckwheat has a conservation status of S4T1?, which indicates it’s quite rare. If you decide to add this special plant to your garden, make sure you’re sourcing it responsibly from reputable native plant nurseries that propagate their own stock rather than wild-collecting.

Garden Appeal and Design Uses

While we don’t have specific details about its exact appearance, Matthews’ buckwheat likely shares the family traits of producing clusters of small, delicate flowers that range from white to pink. These blooms typically appear in late spring to early summer, creating a soft, cloud-like effect in the garden.

This plant shines in:

  • Rock gardens where its natural habitat preferences come into play
  • Xeric or drought-tolerant garden designs
  • Native plant gardens celebrating Utah’s natural heritage
  • Low-maintenance landscape areas

Growing Conditions

Matthews’ buckwheat thrives in conditions that mirror its native habitat. Think full sun and well-draining soil—this plant absolutely cannot tolerate soggy feet. It’s adapted to USDA hardiness zones 4-8, making it suitable for most temperate regions.

Key growing requirements:

  • Full sun exposure (6+ hours daily)
  • Well-draining, sandy or rocky soil
  • Minimal water once established
  • Good air circulation

Pollinator Paradise

Like most buckwheat species, Matthews’ buckwheat is a pollinator magnet. The small flowers provide nectar and pollen for native bees, butterflies, and other beneficial insects. By planting this native species, you’re supporting local ecosystem health while creating a beautiful, low-maintenance garden feature.

Planting and Care Tips

The beauty of Matthews’ buckwheat lies in its simplicity. Once established, this plant requires minimal intervention:

  • Plant in spring after the last frost date
  • Water regularly during the first growing season to establish roots
  • After establishment, water sparingly—this plant prefers to stay on the dry side
  • Avoid fertilizing, as rich soils can actually harm native desert plants
  • Allow the plant to go dormant naturally in winter

Is Matthews’ Buckwheat Right for Your Garden?

This native gem is perfect for gardeners who want to:

  • Create a low-water, sustainable landscape
  • Support native wildlife and pollinators
  • Grow plants that truly belong in their region (if you’re in Utah)
  • Add unique, rare plants to their collection responsibly

However, it might not be the best choice if you prefer high-maintenance, constantly blooming annuals or if you have heavy, poorly draining clay soil that you can’t amend.

Matthews’ buckwheat represents the quiet beauty of Utah’s native flora—resilient, adapted, and perfectly suited to thrive where other plants might struggle. By choosing this rare native, you’re not just adding a plant to your garden; you’re preserving a piece of Utah’s natural heritage for future generations to enjoy.

Matthews’ Buckwheat

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Polygonales

Family

Polygonaceae Juss. - Buckwheat family

Genus

Eriogonum Michx. - buckwheat

Species

Eriogonum thompsoniae S. Watson - Thompson's buckwheat

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