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!