North America Native Plant

Louisiana Nerveray

Botanical name: Tetragonotheca ludoviciana

USDA symbol: TELU

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Halea ludoviciana Torr. & A. Gray (HALU2)   

Louisiana Nerveray: A Rare Native Wildflower Worth Protecting Meet the Louisiana nerveray (Tetragonotheca ludoviciana), a charming native wildflower that’s as rare as it is beautiful. This perennial gem might not be on every gardener’s radar, but it deserves serious consideration for those passionate about preserving native plant heritage and supporting ...

Rare plant alert!

Region: Louisiana

Status: S1: 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) ⚘

Louisiana Nerveray: A Rare Native Wildflower Worth Protecting

Meet the Louisiana nerveray (Tetragonotheca ludoviciana), a charming native wildflower that’s as rare as it is beautiful. This perennial gem might not be on every gardener’s radar, but it deserves serious consideration for those passionate about preserving native plant heritage and supporting local ecosystems.

What Makes Louisiana Nerveray Special?

Louisiana nerveray is a native forb – essentially a non-woody perennial plant that dies back to the ground each winter and returns with fresh growth in spring. What sets this plant apart is its distinctive square stems and cheerful yellow, daisy-like flowers that bloom from spring through fall, providing an extended season of color in the garden.

The botanical name Tetragonotheca literally means four-angled case, referring to those unique square stems that make identification easy once you know what to look for.

Where Does It Call Home?

This native wildflower has a limited natural range, growing only in Arkansas, Louisiana, and Texas. It’s particularly at home in the coastal plains region, where it thrives in the humid, subtropical climate.

A Word of Caution: Rarity Matters

Here’s something important every gardener should know: Louisiana nerveray has a rarity status of S1 in both Arkansas and Louisiana, meaning it’s critically imperiled in these states. This makes it a plant worth protecting and growing responsibly.

If you’re considering adding Louisiana nerveray to your garden, please ensure you source it from reputable native plant nurseries that grow their stock from seed rather than wild-collecting. Never harvest this plant from the wild – doing so could harm already vulnerable populations.

Growing Louisiana Nerveray Successfully

The good news is that Louisiana nerveray is relatively easy to grow once you understand its preferences. This plant thrives in:

  • Full sun to partial shade conditions
  • Moist to wet soils (it’s quite tolerant of clay)
  • USDA hardiness zones 8-10
  • Areas with consistent moisture

Once established, Louisiana nerveray is refreshingly low-maintenance. It’s drought-tolerant but performs best with regular watering, especially during dry spells.

Perfect Garden Companions

Louisiana nerveray shines in wildflower gardens, prairie restorations, and naturalized areas. It pairs beautifully with other native plants from its region and creates stunning displays when allowed to form colonies over time.

Consider incorporating it into:

  • Native plant gardens
  • Pollinator-friendly landscapes
  • Rain gardens or areas with naturally moist soil
  • Meadow-style plantings

Supporting Local Wildlife

Like many native wildflowers, Louisiana nerveray is an excellent choice for supporting local pollinators. Its bright yellow flowers attract bees, butterflies, and other beneficial insects throughout its long blooming season, providing crucial nectar sources when many other plants have finished flowering.

The Bottom Line

Louisiana nerveray represents something special in the gardening world – a chance to grow a piece of our native plant heritage while contributing to conservation efforts. Its rarity makes it all the more precious, and its relatively easy care requirements make it accessible to gardeners willing to seek out responsibly sourced plants.

If you live within its natural range and can source it ethically, Louisiana nerveray offers the satisfaction of growing something truly unique while supporting local ecosystems. Just remember: with rare plants comes responsibility, so always choose conservation-minded suppliers and never collect from the wild.

Louisiana Nerveray

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Tetragonotheca L. - nerveray

Species

Tetragonotheca ludoviciana (Torr. & A. Gray) A. Gray ex H.M. Hall - Louisiana nerveray

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