North America Native Plant

Wedge Sandmat

Botanical name: Chamaesyce deltoidea

USDA symbol: CHDE7

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Wedge Sandmat: A Rare Florida Native Worth Protecting Meet wedge sandmat (Chamaesyce deltoidea), a tiny but mighty native plant that’s fighting for survival in Florida’s coastal landscapes. This little-known perennial herb might not win any beauty contests, but it plays a crucial role in Florida’s unique ecosystem and deserves our ...

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) ⚘

Wedge Sandmat: A Rare Florida Native Worth Protecting

Meet wedge sandmat (Chamaesyce deltoidea), a tiny but mighty native plant that’s fighting for survival in Florida’s coastal landscapes. This little-known perennial herb might not win any beauty contests, but it plays a crucial role in Florida’s unique ecosystem and deserves our attention – and protection.

What Makes Wedge Sandmat Special?

Wedge sandmat is what botanists call a forb – essentially a soft-stemmed plant without woody tissue that dies back to ground level. Don’t let its humble appearance fool you, though. This scrappy little survivor has adapted perfectly to life in Florida’s challenging sandy environments, where few other plants dare to grow.

As a true Florida native, wedge sandmat has been calling the Sunshine State home long before any of us arrived on the scene. It’s perfectly adapted to the state’s unique climate and soil conditions, making it a valuable addition to native plant gardens.

Where to Find Wedge Sandmat

This rare gem is found exclusively in Florida, where it clings to life in coastal areas and sandy habitats. Its distribution is extremely limited, which brings us to an important point we need to discuss.

A Plant in Peril: Why Rarity Matters

Important Conservation Note: Wedge sandmat carries a Global Conservation Status of S2, meaning it’s considered Imperiled. With only 6 to 20 known occurrences and potentially fewer than 3,000 individual plants remaining, this species is walking a tightrope toward extinction.

What does this mean for gardeners? If you’re interested in growing wedge sandmat, you should only obtain plants or seeds from reputable native plant nurseries that source their material responsibly. Never collect from wild populations – every plant in the wild is precious for the species’ survival.

Growing Wedge Sandmat: What You Need to Know

If you’re lucky enough to find responsibly sourced wedge sandmat, here’s what this little plant needs to thrive:

Climate Requirements

  • USDA Hardiness Zones 9-11 (basically, Florida and similar warm climates)
  • Full sun exposure
  • High heat and humidity tolerance

Soil and Water Needs

  • Sandy, well-draining soil is absolutely essential
  • Excellent drainage – this plant hates wet feet
  • Drought tolerant once established
  • Minimal watering required after the first growing season

Design Ideas: Where Wedge Sandmat Shines

Wedge sandmat isn’t your typical showstopper, but it has its place in specialized gardens:

  • Native plant gardens: Perfect for authentic Florida landscapes
  • Coastal restoration projects: Helps stabilize sandy soils
  • Xerophytic gardens: Ideal for low-water, desert-style plantings
  • Conservation gardens: Showcase rare and endangered native species

Wildlife and Pollinator Benefits

While wedge sandmat may seem inconspicuous, it likely provides food and habitat for small insects and other tiny creatures that are part of Florida’s complex web of life. Every native plant, no matter how small, plays a role in supporting local ecosystems.

The Bottom Line: Should You Grow Wedge Sandmat?

Here’s the honest truth: wedge sandmat is a plant for dedicated native plant enthusiasts and conservation-minded gardeners rather than casual landscapers. Its rarity means it’s not readily available, and its specific growing requirements make it challenging for beginners.

However, if you’re passionate about Florida native plants and have the right growing conditions, adding wedge sandmat to your garden can be a meaningful act of conservation. Just remember:

  • Only purchase from reputable sources that use responsibly sourced material
  • Never collect from wild populations
  • Consider it a conservation effort as much as a gardening project
  • Be patient – rare plants often require extra care and attention

By growing wedge sandmat responsibly, you’re not just adding a unique native plant to your garden – you’re becoming part of the effort to keep this special species from disappearing forever. And that’s something worth celebrating, don’t you think?

Wedge 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 deltoidea (Engelm. ex Chapm.) Small - wedge sandmat

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