North America Native Plant

Dark Noseburn

Botanical name: Tragia nigricans

USDA symbol: TRNI

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Dark Noseburn: A Rare Texas Native Worth Protecting in Your Garden If you’re passionate about growing native plants and supporting conservation efforts, dark noseburn (Tragia nigricans) might just be the perfect addition to your Texas garden. This little-known perennial forb represents something special in the world of native gardening—a chance ...

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 ⚘

Dark Noseburn: A Rare Texas Native Worth Protecting in Your Garden

If you’re passionate about growing native plants and supporting conservation efforts, dark noseburn (Tragia nigricans) might just be the perfect addition to your Texas garden. This little-known perennial forb represents something special in the world of native gardening—a chance to help preserve a vulnerable species while adding authentic local flora to your landscape.

What Makes Dark Noseburn Special

Dark noseburn is a humble yet important member of Texas’s native plant community. As a perennial forb, it’s an herbaceous plant that lacks significant woody growth but returns year after year from its root system. Don’t expect flashy blooms or dramatic foliage—this plant’s beauty lies in its authenticity and ecological value rather than showy garden appeal.

Where You’ll Find Dark Noseburn

This native species calls Texas home, where it has evolved alongside local wildlife and climate conditions for thousands of years. As a true Texas native, it’s perfectly adapted to the state’s unique growing conditions and represents an authentic piece of the local ecosystem.

A Plant That Needs Our Help

Here’s where things get important: dark noseburn has a Global Conservation Status of S3, meaning it’s considered vulnerable. With only an estimated 21 to 100 occurrences or between 3,000 to 10,000 individuals remaining, this species faces real conservation challenges. This rarity status makes it both a treasure and a responsibility for gardeners.

Important note: If you choose to grow dark noseburn, please only obtain plants or seeds from reputable native plant nurseries that practice responsible propagation. Never collect from wild populations, as this could harm already vulnerable communities.

Growing Dark Noseburn Successfully

While specific growing information for Tragia nigricans is limited, we can draw from what we know about its plant family and Texas native requirements:

  • Climate zones: Likely thrives in USDA zones 8-10, matching Texas’s climate
  • Soil preferences: Probably prefers well-draining soils typical of Texas natives
  • Water needs: Likely drought-tolerant once established, as befits a Texas native
  • Sun exposure: Most Texas natives prefer full sun to partial shade

Is Dark Noseburn Right for Your Garden?

This plant is perfect for gardeners who:

  • Want to support conservation efforts through gardening
  • Appreciate subtle, natural beauty over flashy ornamentals
  • Are creating native plant gardens or naturalized areas
  • Live in Texas and want truly local flora
  • Enjoy being part of preserving rare species

Dark noseburn might not be the right choice if you’re looking for dramatic color, fast growth, or a plant that will be the star of your flower border. Its appeal lies in its ecological significance rather than ornamental impact.

Supporting Wildlife and Ecosystems

As a native Texas plant, dark noseburn likely provides some benefits to local wildlife, though specific information is limited. Native plants typically support local insects, which in turn support birds and other wildlife in ways that non-native ornamentals simply cannot match.

The Bottom Line

Growing dark noseburn isn’t about creating a showstopper garden—it’s about being a steward of Texas’s natural heritage. By choosing to grow this vulnerable native species (responsibly sourced, of course), you’re participating in conservation while creating habitat for local wildlife. It’s a quiet but meaningful way to make your garden matter beyond its borders.

If you’re drawn to the idea of conservation gardening and want to support Texas’s native plant diversity, dark noseburn could be a rewarding addition to your landscape. Just remember: with great plants comes great responsibility, especially when they’re as rare and special as this one.

Dark Noseburn

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

Tragia L. - noseburn

Species

Tragia nigricans Bush - dark noseburn

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