North America Native Plant

Corzo’s Wild Petunia

Botanical name: Ruellia corzoi

USDA symbol: RUCO

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Corzo’s Wild Petunia: A Texas Native Worth Getting to Know If you’re a native plant enthusiast with a passion for discovering lesser-known gems, Corzo’s wild petunia (Ruellia corzoi) might just pique your interest. This perennial forb represents one of Texas’s native botanical treasures, though it remains somewhat of a mystery ...

Corzo’s Wild Petunia: A Texas Native Worth Getting to Know

If you’re a native plant enthusiast with a passion for discovering lesser-known gems, Corzo’s wild petunia (Ruellia corzoi) might just pique your interest. This perennial forb represents one of Texas’s native botanical treasures, though it remains somewhat of a mystery even to seasoned gardeners.

What is Corzo’s Wild Petunia?

Ruellia corzoi is a native perennial herb that belongs to the wild petunia family. As a forb, it’s a non-woody plant that dies back to ground level but returns year after year from its root system. Like other members of the Ruellia genus, it likely produces attractive tubular flowers, though specific details about this particular species remain elusive in gardening literature.

Where Does It Call Home?

This native beauty is endemic to Texas, making it a true Lone Star State original. Its limited geographic distribution suggests it has adapted to specific regional conditions found within Texas ecosystems.

The Challenge and Appeal of Growing Corzo’s Wild Petunia

Here’s where things get interesting – and a bit challenging. Ruellia corzoi appears to be one of those native species that hasn’t made its way into mainstream horticulture yet. This could be for several reasons:

  • It may have very specific growing requirements
  • It might be naturally rare or have a limited distribution
  • Seeds or plants may not be readily available commercially
  • It could be a recently described species with limited cultivation history

What This Means for Your Garden

If you’re determined to grow Corzo’s wild petunia, you’ll need to do some detective work. Since specific growing conditions, hardiness zones, and care requirements aren’t well-documented, you’d be venturing into experimental gardening territory.

However, we can make some educated guesses based on its Texas heritage and relationship to other Ruellia species. Most wild petunias prefer:

  • Well-draining soils
  • Partial shade to full sun
  • Moderate water once established
  • Protection from harsh winter conditions if grown outside their native range

A Word of Caution and Responsibility

Given the limited information available about Ruellia corzoi, it’s possible this species has conservation concerns. If you do locate seeds or plants, ensure they come from reputable, ethical sources that don’t harvest from wild populations. Never collect plants from the wild without proper permits and expertise.

Alternative Native Wild Petunias

While you’re searching for Corzo’s wild petunia, consider these more readily available native Ruellia species:

  • Wild petunia (Ruellia humilis) – widely available and adaptable
  • Smooth wild petunia (Ruellia strepens) – great for woodland gardens
  • Desert petunia (Ruellia peninsularis) – perfect for arid southwestern landscapes

The Bottom Line

Corzo’s wild petunia represents the fascinating world of lesser-known native plants that deserve more attention and study. While it may not be practical for most home gardeners right now, it highlights the incredible diversity of native species waiting to be better understood and potentially brought into cultivation.

If you’re a plant explorer at heart, keep an eye out for more information about this Texas native. Who knows? You might be among the first to successfully cultivate this intriguing species and help bring it into the broader native gardening community.

Corzo’s Wild Petunia

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

Scrophulariales

Family

Acanthaceae Juss. - Acanthus family

Genus

Ruellia L. - wild petunia

Species

Ruellia corzoi Tharp & F.A. Barkley - Corzo's wild petunia

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