North America Native Plant

Berteron’s Sandmat

Botanical name: Chamaesyce berteriana

USDA symbol: CHBE6

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states âš˜ Native to Puerto Rico  

Synonyms: Euphorbia berteriana Balbis ex Spreng. (EUBE3)  âš˜  Euphorbia stipitata Millsp. (EUST8)   

Berteron’s Sandmat: A Little-Known Native Treasure If you’re on the hunt for native plants that fly under the radar, you might want to get acquainted with Berteron’s sandmat (Chamaesyce berteriana). This unassuming annual forb represents one of those quiet natives that doesn’t make headlines but plays its part in local ...

Berteron’s Sandmat: A Little-Known Native Treasure

If you’re on the hunt for native plants that fly under the radar, you might want to get acquainted with Berteron’s sandmat (Chamaesyce berteriana). This unassuming annual forb represents one of those quiet natives that doesn’t make headlines but plays its part in local ecosystems. While it may not be the showstopper of your garden, understanding this plant can deepen your appreciation for the subtle diversity of native flora.

What Exactly Is Berteron’s Sandmat?

Berteron’s sandmat belongs to the spurge family and goes by the scientific name Chamaesyce berteriana. You might also encounter it in older botanical references under its synonyms Euphorbia berteriana or Euphorbia stipitata. As an annual forb, this plant completes its entire life cycle in a single growing season, lacking the woody stems that characterize shrubs and trees.

True to its classification as a forb, Berteron’s sandmat is a non-woody vascular plant that keeps its growing points at or below ground level during harsh conditions. Think of it as nature’s way of staying low-key and resilient.

Where Does It Call Home?

This native species has a rather limited natural range, calling both Texas and Puerto Rico home. It’s quite fascinating how some plants can have such specific geographic preferences! The fact that it’s native to both a mainland U.S. state and a Caribbean territory speaks to its adaptability within certain climatic zones.

Should You Grow Berteron’s Sandmat?

Here’s where things get interesting – and a bit challenging. While Berteron’s sandmat is undoubtedly a legitimate native species worthy of conservation and respect, detailed horticultural information about this particular plant is surprisingly scarce. This doesn’t mean it’s not worth growing; it just means you’d be joining a pretty exclusive club of gardeners working with lesser-known natives.

Consider Berteron’s sandmat if you’re:

  • Passionate about growing truly local native species
  • Creating habitat for native wildlife, even if the specific benefits aren’t well-documented
  • Interested in supporting biodiversity through lesser-known plants
  • Working on restoration projects in Texas or Puerto Rico

The Growing Challenge

Here’s the honest truth: specific growing information for Berteron’s sandmat is limited in readily available horticultural sources. As with many native forbs in the spurge family, it likely prefers well-draining soils and can handle some drought once established. Being an annual, it would need to reseed itself or be replanted each year.

If you’re determined to grow this species, your best bet would be to:

  • Contact local native plant societies in Texas or Puerto Rico
  • Reach out to botanical gardens or universities in its native range
  • Look for seeds from reputable native plant seed companies
  • Observe its natural habitat to understand its preferred growing conditions

Alternative Native Options

If you’re drawn to the idea of growing native spurges but want something with more available growing information, consider looking into other Chamaesyce species native to your area. Many members of this genus offer similar ecological benefits with better-documented care requirements.

For Texas gardeners, other native options in the spurge family might include more common Chamaesyce species that local nurseries and native plant experts can provide guidance on growing successfully.

The Bottom Line

Berteron’s sandmat represents the wonderful complexity of native plant diversity – there are so many species out there that even passionate gardeners haven’t heard of most of them! While this particular plant might not be the easiest addition to your garden toolkit, it serves as a reminder that supporting native biodiversity sometimes means embracing the lesser-known players in our local ecosystems.

Whether you choose to seek out this specific species or opt for better-known natives, every step toward supporting local flora helps create more resilient and authentic landscapes. Sometimes the most rewarding gardening adventures come from exploring the road less traveled – or in this case, the plant less planted!

Berteron’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 berteriana (Balbis ex Spreng.) Millsp. - Berteron'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