North America Native Plant

Drushel’s Wild Petunia

Botanical name: Ruellia drushelii var. macrocarpa

USDA symbol: RUDRM

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Drushel’s Wild Petunia: A Rare Texas Native Worth Knowing About Meet Drushel’s wild petunia (Ruellia drushelii var. macrocarpa), one of Texas’s lesser-known native wildflowers that’s so rare, you might never encounter it in your local nursery. This intriguing perennial belongs to the wild petunia family, though it’s not actually related ...

Drushel’s Wild Petunia: A Rare Texas Native Worth Knowing About

Meet Drushel’s wild petunia (Ruellia drushelii var. macrocarpa), one of Texas’s lesser-known native wildflowers that’s so rare, you might never encounter it in your local nursery. This intriguing perennial belongs to the wild petunia family, though it’s not actually related to the colorful petunias we know from garden centers.

A True Texas Native

Drushel’s wild petunia is a genuine Texas native, making it a valuable addition to any native plant garden focused on supporting local ecosystems. As a perennial forb – that’s botanist-speak for a non-woody flowering plant – it comes back year after year, unlike its annual cousins.

This plant is found exclusively in Texas, making it a true regional specialty. Its limited geographic range adds to its mystique and potential conservation value.

What Makes This Plant Special

As a herbaceous perennial, Drushel’s wild petunia grows as a soft-stemmed plant without the woody tissue you’d find in shrubs or trees. Like other members of the Ruellia family, it likely produces attractive flowers, though specific details about its appearance and blooming habits are scarce in horticultural literature.

The Challenge: Limited Information

Here’s where things get interesting – and a bit frustrating for curious gardeners. Drushel’s wild petunia is so uncommon in cultivation that detailed growing information is virtually non-existent. This rarity could mean several things:

  • It may be naturally rare in the wild
  • It might have very specific habitat requirements
  • It could simply be overlooked by the horticultural trade

Should You Try Growing It?

The honest answer is: probably not, unless you’re a serious native plant enthusiast with experience growing rare Texas natives. The lack of available seeds, plants, or growing information makes this a challenging choice for most gardeners.

If you’re drawn to the idea of Texas native wild petunias, consider these more readily available alternatives:

  • Common wild petunia (Ruellia humilis)
  • Violet wild petunia (Ruellia nudiflora)
  • Other Texas native Ruellia species

For the Adventurous Gardener

If you’re determined to learn more about Drushel’s wild petunia, your best bet is connecting with native plant societies in Texas or botanical gardens that specialize in rare Texas natives. They might have insights about habitat requirements or conservation efforts.

Given its rarity, any cultivation attempts should only use responsibly sourced material – never collect from wild populations, which could harm already limited natural stands.

The Bottom Line

Drushel’s wild petunia represents the fascinating world of rare native plants that exist just beyond our gardening mainstream. While it may not be practical for most home gardens, knowing about plants like this reminds us of the incredible botanical diversity right in our own regions.

Sometimes the most valuable plants are the ones we simply appreciate from afar, supporting their conservation while choosing their more garden-ready relatives for our landscapes.

Drushel’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 drushelii Tharp & F.A. Barkley - Drushel'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