North America Native Plant

Carolina Wild Petunia

Botanical name: Ruellia caroliniensis caroliniensis var. succulenta

USDA symbol: RUCAS7

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Ruellia succulenta Small (RUSU6)   

Carolina Wild Petunia: A Rare Florida Native Worth Protecting Meet one of Florida’s most elusive wildflowers: the Carolina wild petunia (Ruellia caroliniensis caroliniensis var. succulenta). This charming native perennial might not be on every gardener’s wish list yet, but it deserves a spot in the conversation about preserving Florida’s unique ...

Rare plant alert!

Region: Conservation status by state

Status: S5T1T2: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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) ⚘ Subspecies or variety is imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ 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. ⚘

Carolina Wild Petunia: A Rare Florida Native Worth Protecting

Meet one of Florida’s most elusive wildflowers: the Carolina wild petunia (Ruellia caroliniensis caroliniensis var. succulenta). This charming native perennial might not be on every gardener’s wish list yet, but it deserves a spot in the conversation about preserving Florida’s unique botanical heritage.

What Makes This Plant Special?

The Carolina wild petunia is a fascinating example of how plants adapt to specific environments. As a native forb (that’s gardener-speak for a non-woody herbaceous plant), it represents the incredible diversity found within Florida’s ecosystems. This perennial has evolved to thrive in very specific conditions, making it a true Sunshine State original.

Also known by its synonym Ruellia succulenta Small, this plant showcases the intricate relationships between plants and their native habitats that have developed over thousands of years.

Where Does It Call Home?

This particular variety of Carolina wild petunia has a very limited range, being found exclusively in Florida. Its restricted distribution makes it a special representative of the state’s endemic flora—plants that exist nowhere else on Earth.

A Word of Caution: Rarity Matters

Here’s where things get important for responsible gardeners. This plant has a conservation status that suggests it’s quite rare in the wild. Before you get excited about adding it to your garden, let’s talk about what this means for you as a conscientious gardener.

If you’re interested in growing this plant, please ensure any material comes from responsible, ethical sources. Never collect plants from the wild, and always verify that any nursery stock has been propagated legally and sustainably. Supporting conservation efforts for rare natives like this one helps preserve Florida’s botanical treasures for future generations.

Growing Considerations

While specific growing information for this rare variety is limited, native Florida forbs typically appreciate:

  • Conditions that mimic their natural habitat
  • Well-draining soil (many Florida natives don’t like wet feet)
  • Appropriate light levels for their ecosystem niche
  • Minimal fertilization once established

As a perennial, this plant would return year after year, making it a potentially valuable long-term addition to a native Florida garden focused on conservation.

The Bigger Picture: Why Rare Natives Matter

Growing rare native plants like the Carolina wild petunia isn’t just about having something unique in your garden—it’s about participating in conservation. These plants often support specialized wildlife relationships that have developed over millennia. While we don’t have specific data on this variety’s wildlife benefits, native forbs typically provide nectar, pollen, and habitat for native insects, birds, and other wildlife.

Is This Plant Right for Your Garden?

This might be the right choice for you if:

  • You’re passionate about Florida native plants
  • You want to support conservation efforts
  • You have access to ethically sourced material
  • You’re interested in creating habitat for native wildlife
  • You appreciate the story behind rare and unique plants

However, if you’re new to native gardening or looking for easier-to-find alternatives, consider starting with more widely available Florida native wildflowers while you research reputable sources for rare species.

The Bottom Line

The Carolina wild petunia represents the incredible diversity and specialization found in Florida’s native plant communities. While its rarity means it requires extra consideration and responsibility from gardeners, it also represents an opportunity to participate in preserving the state’s unique botanical heritage. If you choose to grow this special plant, make sure you’re doing so in a way that supports, rather than threatens, its wild populations.

Remember: the best native gardens are those that both celebrate and protect our natural heritage for generations to come.

Carolina 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 caroliniensis (J.F. Gmel.) Steud. - Carolina 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