North America Non-native Plant

Pasto Rojo

Botanical name: Paspalum guenoarum

USDA symbol: PAGU4

Habit: grass

Native status: Not native but doesn't reproduce and persist in the wild

Pasto Rojo (Paspalum guenoarum): A Mystery Grass Worth Investigating If you’ve stumbled across the name pasto rojo or its scientific name Paspalum guenoarum while researching native grasses, you might be scratching your head trying to find more information. You’re not alone! This particular grass species presents quite the botanical puzzle. ...

Pasto Rojo (Paspalum guenoarum): A Mystery Grass Worth Investigating

If you’ve stumbled across the name pasto rojo or its scientific name Paspalum guenoarum while researching native grasses, you might be scratching your head trying to find more information. You’re not alone! This particular grass species presents quite the botanical puzzle.

What We Know (And Don’t Know)

Pasto rojo, also known as wintergreen paspalum, belongs to the vast Paspalum genus within the grass family (Poaceae). The name pasto rojo translates to red grass in Spanish, which gives us a hint about its appearance or origin in Spanish-speaking regions. However, here’s where things get interesting (and a bit frustrating for us plant enthusiasts): reliable information about Paspalum guenoarum specifically is surprisingly scarce in botanical literature and databases.

The Paspalum Family Connection

While we can’t say much about this particular species with certainty, we do know it’s part of the Paspalum genus, which includes many important grass species found throughout the Americas. These grasses are typically:

  • Warm-season perennials or annuals
  • Important for wildlife habitat and erosion control
  • Adapted to various soil conditions
  • Valued for their ecological benefits

A Word of Caution for Gardeners

Before you rush out to plant pasto rojo in your native garden, take a step back. The lack of readily available information about Paspalum guenoarum raises some red flags. It’s possible that:

  • This might be a regional common name for a different, better-documented Paspalum species
  • The scientific name might need verification or correction
  • It could be a very localized species with limited distribution

What Should You Do Instead?

If you’re interested in incorporating native Paspalum grasses into your landscape, consider these well-documented alternatives that offer proven benefits for native gardening:

  • Purple top (Paspalum plicatulum) – Excellent for wildlife habitat
  • Bahiagrass (Paspalum notatum) – Great for erosion control
  • Bull paspalum (Paspalum boscianum) – Thrives in moist conditions

The Bottom Line

While the mystery of pasto rojo remains unsolved, this highlights an important lesson for native plant enthusiasts: always verify plant identifications and source your plants from reputable native plant nurseries. When in doubt, consult with local botanists, extension offices, or native plant societies who can help you identify the best native grasses for your specific region and garden goals.

Sometimes the most valuable gardening advice is knowing when to pause and ask more questions – and pasto rojo is definitely one of those cases where a little detective work might be needed before planting!

Pasto Rojo

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Paspalum L. - crowngrass

Species

Paspalum guenoarum Arechav. - pasto rojo

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