Native Plants

Ribbed False Pennyroyal

Hedeoma costata var. costata

USDA symbol: HECOC4

perennial forb

Lower 48 states: native

Meet ribbed false pennyroyal (Hedeoma costata var. costata), a charming little native plant that’s been quietly growing in Texas long before anyone thought to give it a catchy common name. This unassuming perennial forb belongs to the mint family and represents one of nature’s more modest offerings – the kind ...

Ribbed False Pennyroyal may be listed as rare in your area.
Global Conservation Status

Status: S5T3? | Secure: At low or no risk of extinction in the area due to an extensive range, abundant populations, and with little to no concern of declines or threats.

Ribbed False Pennyroyal: A Lesser-Known Texas Native Worth Discovering

Meet ribbed false pennyroyal (Hedeoma costata var. costata), a charming little native plant that’s been quietly growing in Texas long before anyone thought to give it a catchy common name. This unassuming perennial forb belongs to the mint family and represents one of nature’s more modest offerings – the kind of plant that doesn’t shout for attention but has plenty of character once you get to know it.

What Makes Ribbed False Pennyroyal Special?

As a true Texas native, ribbed false pennyroyal has been calling the Lone Star State home for countless generations. This perennial forb – basically a non-woody plant that comes back year after year – has adapted perfectly to local conditions and plays its part in the state’s natural ecosystem.

The plant gets its ribbed name from the distinctive texture of its stems or leaves, though like many of our native wildflowers, it tends to keep a low profile in the plant world. You might also see it listed under its botanical synonym, Hedeoma tenella, in older references.

Where Does It Grow?

Ribbed false pennyroyal is found exclusively in Texas, making it a true regional specialty. This limited distribution makes it a particularly authentic choice for Texas gardeners looking to showcase their state’s unique botanical heritage.

  • Species observed
  • No observations

Should You Plant Ribbed False Pennyroyal?

Here’s where things get a bit interesting – and honestly, a little mysterious. This native plant falls into that category of species that botanists know exists but hasn’t received much attention from the gardening world. Its conservation status is listed as undefined, which means we don’t have a clear picture of how common or rare it might be.

The good news: As a native Texas plant, it’s naturally adapted to local growing conditions and supports native ecosystems.

The caution: Given the uncertain conservation status, if you do decide to grow this plant, make sure you source it responsibly from reputable native plant nurseries rather than collecting from the wild.

Growing Ribbed False Pennyroyal

Unfortunately, this is one of those native plants that hasn’t made it into many gardening guides yet. As a Texas native forb, it’s likely adapted to:

  • Hot summers and variable rainfall patterns
  • Well-draining soils typical of Texas landscapes
  • Seasonal temperature fluctuations

Since specific growing information is limited, your best bet is to mimic the natural conditions where native Texas forbs typically thrive – think sunny to partly sunny locations with good drainage and minimal supplemental watering once established.

The Bottom Line

Ribbed false pennyroyal represents one of those hidden gems in the native plant world – a true Texas original that could add authentic local character to the right garden. However, the lack of widely available information means you’ll be something of a pioneer if you choose to grow it.

If you’re drawn to rare and unusual native plants and want to support Texas biodiversity, this could be an interesting addition to your garden. Just remember to source responsibly and consider it part of your contribution to preserving Texas’s botanical heritage.

For gardeners looking for better-documented Texas native alternatives, consider exploring other members of the mint family or consulting with local native plant societies who might have more insights into this intriguing little forb.

Hedeoma costata var. costata is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Hedeoma costata var. costata is also known as:

Hedeoma tenella | USDA symbol: HETE22

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Asteridae
Order: Lamiales
Family: Lamiaceae Martinov - Mint family
Genus: Hedeoma Pers. - false pennyroyal

Species: Hedeoma costata A. Gray - ribbed false pennyroyal

Variety: Hedeoma costata A. Gray var. costata - ribbed false pennyroyal

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