North America Native Plant

Stalked Wild Petunia

Botanical name: Ruellia pedunculata pinetorum

USDA symbol: RUPEP

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Ruellia pinetorum Fernald (RUPI2)   

Stalked Wild Petunia: A Native Southeastern Charmer for Your Garden Meet the stalked wild petunia (Ruellia pedunculata pinetorum), a delightful native perennial that might just be the under-the-radar gem your garden has been waiting for. While it may not have the flashy reputation of some showier natives, this humble forb ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3T4: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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. ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Stalked Wild Petunia: A Native Southeastern Charmer for Your Garden

Meet the stalked wild petunia (Ruellia pedunculata pinetorum), a delightful native perennial that might just be the under-the-radar gem your garden has been waiting for. While it may not have the flashy reputation of some showier natives, this humble forb brings its own special charm to southeastern landscapes.

What Is Stalked Wild Petunia?

Despite its common name, the stalked wild petunia isn’t actually related to the petunias you might know from your local garden center. This native beauty belongs to the Ruellia family and goes by the scientific name Ruellia pedunculata pinetorum (you might also see it listed under its synonym, Ruellia pinetorum Fernald). As a perennial forb, it’s an herbaceous plant that comes back year after year without developing woody stems like shrubs or trees.

Where Does It Call Home?

This southeastern native has quite a respectable range across the lower 48 states. You’ll find stalked wild petunia naturally occurring in Alabama, Florida, Georgia, Louisiana, Mississippi, South Carolina, and Texas. It’s particularly at home in the pine forests and woodlands of these regions, which gives us a big hint about the conditions it prefers.

Why Consider Stalked Wild Petunia for Your Garden?

Here’s where things get interesting – and a bit mysterious. While we know this plant is a legitimate native species with a decent geographic range, detailed information about its specific horticultural characteristics is surprisingly scarce. This could mean a few things:

  • It’s a specialist plant that thrives in very specific conditions
  • It hasn’t been widely cultivated or studied for garden use
  • It might be more subtle in its beauty than some of its flashier native cousins

What we do know is that as a native plant, it’s likely to be well-adapted to local conditions and potentially beneficial to native wildlife, even if the specific details aren’t well-documented.

The Reality Check: Limited Information Available

Here’s where I need to be completely honest with you – detailed growing information for this specific subspecies is extremely limited. Unlike popular natives that have been extensively studied and cultivated, stalked wild petunia remains somewhat of an enigma in the horticultural world.

If you’re determined to grow this particular plant, you’ll likely need to:

  • Contact native plant societies in the southeastern states where it occurs
  • Reach out to botanical gardens or universities in its native range
  • Look for specialty native plant nurseries that might carry it
  • Ensure any plants are responsibly sourced and not collected from wild populations

Better-Known Alternatives to Consider

While stalked wild petunia might be elusive, there are other Ruellia species and similar natives that are more readily available and better understood:

  • Wild petunia (Ruellia humilis) – a more common and well-documented native
  • Other native wildflowers suited to southeastern pine woodlands
  • Native plants that support similar ecological functions

The Bottom Line

Stalked wild petunia represents one of those fascinating native plants that reminds us how much we still have to learn about our local flora. While it may not be the easiest plant to source or grow, it highlights the incredible diversity of native species in our southeastern forests.

If you’re a native plant enthusiast looking for a challenge, or if you happen to live in an area where this plant occurs naturally, it could be worth investigating further. Just remember to source any plants responsibly and respect wild populations.

For most gardeners, though, focusing on better-documented native alternatives might be the more practical path to creating a thriving native garden that supports local wildlife and celebrates regional plant diversity.

Stalked 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 pedunculata Torr. ex A. Gray - stalked 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