North America Native Plant

Death Valley Sandmat

Botanical name: Chamaesyce vallismortae

USDA symbol: CHVA4

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Euphorbia vallis-mortae (Millsp.) J.T. Howell (EUVA)   

Death Valley Sandmat: A Rare Desert Gem for Specialized Gardens If you’re looking to add authentic desert character to your landscape, Death Valley sandmat (Chamaesyce vallismortae) might just be the understated beauty you never knew you needed. This tiny perennial forb brings genuine Death Valley wilderness right to your garden ...

Rare plant alert!

Region: Conservation status by state

Status: S3: 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 ⚘

Death Valley Sandmat: A Rare Desert Gem for Specialized Gardens

If you’re looking to add authentic desert character to your landscape, Death Valley sandmat (Chamaesyce vallismortae) might just be the understated beauty you never knew you needed. This tiny perennial forb brings genuine Death Valley wilderness right to your garden – though there are some important things to know before you start planning.

What Makes Death Valley Sandmat Special

Death Valley sandmat is a true California native, specifically endemic to the harsh desert regions of California. As its common name suggests, this tough little plant has evolved to thrive in one of North America’s most extreme environments. It’s also known by its synonym Euphorbia vallis-mortae, reflecting its membership in the spurge family.

This perennial forb grows as a low, mat-forming ground cover that hugs the earth, creating subtle texture in desert landscapes. Don’t expect showy blooms – Death Valley sandmat produces tiny, inconspicuous flowers that blend seamlessly with its small leaves. The appeal here is in its authentic desert character and remarkable resilience.

Where Death Valley Sandmat Grows Naturally

Death Valley sandmat is found exclusively in California, where it clings to life in some of the state’s most challenging desert environments. This plant is a true specialist, adapted to the extreme conditions of desert valleys and rocky slopes.

Important Conservation Considerations

Here’s where things get serious: Death Valley sandmat has a Global Conservation Status of S3, meaning it’s considered vulnerable in the wild. With typically only 21 to 100 known occurrences and between 3,000 to 10,000 individuals total, this isn’t a plant to take lightly.

If you’re interested in growing Death Valley sandmat, please ensure you source it only from reputable native plant nurseries that propagate their own stock rather than collecting from wild populations. Never collect seeds or plants from natural areas – this species needs our protection, not additional pressure on wild populations.

Is Death Valley Sandmat Right for Your Garden?

Death Valley sandmat isn’t for everyone, but it can be perfect for the right situation. Consider this plant if you:

  • Live in USDA hardiness zones 8-10 in arid regions
  • Want authentic desert plants for xeriscaping
  • Have well-draining, sandy or rocky soil
  • Appreciate subtle, naturalistic garden design
  • Are committed to supporting rare plant conservation

Skip this plant if you’re looking for colorful flowers, lush foliage, or something that thrives in humid climates. Death Valley sandmat is all about understated desert elegance.

Growing Death Valley Sandmat Successfully

Success with Death Valley sandmat is all about recreating its harsh native conditions – which means less is definitely more.

Sun and Soil: This plant demands full sun and extremely well-draining soil. Sandy or rocky soils work best. If your soil holds moisture, consider creating a raised bed or rock garden with added sand and gravel.

Water Wisdom: The key to happy Death Valley sandmat is strategic drought. Water sparingly during establishment, then back off almost completely. Overwatering is the fastest way to kill this desert specialist.

Planting Tips: Plant in spring when temperatures are warming but before the intense summer heat arrives. Give plants plenty of space to spread as a mat-forming ground cover.

Design Ideas for Death Valley Sandmat

Think of Death Valley sandmat as nature’s carpet for harsh spaces. It works beautifully in:

  • Rock gardens with desert themes
  • Xeriscapes and drought-tolerant landscapes
  • Spaces between stepping stones in arid gardens
  • Native plant gardens focused on California desert species

Pair it with other desert natives like brittlebush, desert marigold, or barrel cactus for an authentic desert vignette.

The Bottom Line

Death Valley sandmat offers gardeners a chance to grow a genuinely rare and specialized piece of California’s desert heritage. While it won’t provide the immediate gratification of showier plants, it offers something more valuable: a connection to one of North America’s most extreme and fascinating ecosystems.

Just remember – with rarity comes responsibility. Only source this plant from ethical suppliers, and consider it a living piece of conservation history in your garden. For most gardeners seeking desert plants, more common alternatives like desert marigold or brittlebush might be better choices. But if you’re specifically drawn to rare California natives and can provide the right growing conditions, Death Valley sandmat can be a meaningful addition to your landscape.

Death Valley Sandmat

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

Euphorbiales

Family

Euphorbiaceae Juss. - Spurge family

Genus

Chamaesyce Gray - sandmat

Species

Chamaesyce vallis-mortae Millsp. - Death Valley sandmat

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