North America Native Plant

Remy’s Sandmat

Botanical name: Chamaesyce remyi var. hanaleiensis

USDA symbol: CHREH

Life cycle: perennial

Habit: vine

Native status: Native to Hawaii  

Synonyms: Euphorbia remyi A. Gray ex Boiss. var. hanaleiensis Sherff (EUREH)   

Remy’s Sandmat: A Rare Hawaiian Treasure Worth Protecting If you’re drawn to unique Hawaiian native plants, you’ve probably never heard of Remy’s sandmat (Chamaesyce remyi var. hanaleiensis). And honestly, that’s not surprising – this little-known variety is one of Hawaii’s botanical secrets, quietly existing in a very small corner of ...

Rare plant alert!

Region: Conservation status by state

Status: S1TH: Status is uncertain but is somewhere between the following rankings: 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) ⚘

Remy’s Sandmat: A Rare Hawaiian Treasure Worth Protecting

If you’re drawn to unique Hawaiian native plants, you’ve probably never heard of Remy’s sandmat (Chamaesyce remyi var. hanaleiensis). And honestly, that’s not surprising – this little-known variety is one of Hawaii’s botanical secrets, quietly existing in a very small corner of the islands.

What Makes This Plant Special

Remy’s sandmat belongs to the spurge family and is a perennial shrub that typically grows as a multi-stemmed woody plant. Like many Hawaiian natives, it has adapted to very specific local conditions over thousands of years. Previously known by the scientific name Euphorbia remyi var. hanaleiensis, this plant represents the incredible diversity found within Hawaii’s native flora.

Where You’ll Find It (If You’re Lucky)

This variety is endemic to Hawaii, meaning it exists nowhere else on Earth. More specifically, it’s found in the Hanalei area of Kauai, which gives it part of its scientific name. The geographic range is incredibly limited, making every individual plant precious to the ecosystem.

The Reality Check: This Plant Is Incredibly Rare

Here’s where things get serious. Remy’s sandmat has a Global Conservation Status of S1TH, which essentially means it’s critically imperiled. We’re talking about a plant that’s hanging on by a thread in the wild. This isn’t just uncommon – this is every single plant matters for the species’ survival rare.

Should You Grow It?

The short answer is: only if you can source it responsibly and ethically. Given its extreme rarity, here’s what you need to know:

  • Never collect seeds or cuttings from wild populations
  • Only obtain plants from reputable native plant nurseries with proper documentation
  • Consider this more of a conservation effort than typical gardening
  • Understand that availability will be extremely limited, if available at all

Growing Conditions and Care

Since this plant evolved in Hawaii’s unique climate, it’s adapted to tropical conditions. As a shrub, it likely prefers:

  • Warm temperatures year-round
  • Well-draining soil
  • Adequate moisture without waterlogging
  • Protection from harsh winds

However, specific cultivation requirements for this particular variety are not well-documented, which makes sense given its rarity and limited distribution.

The Bigger Picture

Rather than focusing on whether you can grow Remy’s sandmat in your garden, consider supporting Hawaiian native plant conservation efforts. Many other Hawaiian native plants are more readily available and equally deserving of garden space. These alternatives can provide similar ecological benefits while helping preserve Hawaii’s unique botanical heritage.

Final Thoughts

Remy’s sandmat represents something precious and irreplaceable – a plant that has survived in a tiny corner of paradise for millennia. Whether or not it finds a place in cultivation, it deserves our respect and protection. If you’re passionate about Hawaiian natives, support local conservation organizations and choose more common native alternatives for your garden while keeping rare species like this one safe in their natural homes.

Remy’s 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 remyi (A. Gray ex Boiss.) Croizat & O. Deg. - Remy's sandmat

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