North America Non-native Plant

Bothriochloa Ambigua

Botanical name: Bothriochloa ambigua

USDA symbol: BOAM3

Habit: grass

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

Bothriochloa ambigua: The Mysterious Beardgrass If you’ve stumbled upon the name Bothriochloa ambigua while researching native grasses, you might be wondering what exactly this plant is and whether it belongs in your garden. Well, you’re not alone in your curiosity – this particular species is something of an enigma in ...

Bothriochloa ambigua: The Mysterious Beardgrass

If you’ve stumbled upon the name Bothriochloa ambigua while researching native grasses, you might be wondering what exactly this plant is and whether it belongs in your garden. Well, you’re not alone in your curiosity – this particular species is something of an enigma in the botanical world.

What We Know (And Don’t Know)

Bothriochloa ambigua belongs to the beardgrass genus, a group of warm-season grasses known for their distinctive seed heads that shimmer in the breeze. The name ambigua itself gives us a clue – it literally means ambiguous or uncertain, which is rather fitting given how little definitive information exists about this particular species.

Here’s what we can piece together:

  • It’s a member of the grass family (Poaceae)
  • It belongs to the Bothriochloa genus, commonly called beardgrasses
  • Like other beardgrasses, it’s likely a warm-season perennial
  • The species epithet suggests there may have been taxonomic confusion or uncertainty about its classification

The Challenge for Gardeners

Unfortunately, the lack of readily available information about Bothriochloa ambigua makes it difficult to provide specific growing recommendations. We don’t have clear data on its native range, preferred growing conditions, or ecological benefits. This presents a real challenge if you’re trying to make informed decisions about your landscape.

Without knowing its geographic distribution, we can’t determine where it might be considered native, and without understanding its growth habits, it’s impossible to predict how it might perform in your garden.

Better Alternatives to Consider

Given the uncertainty surrounding Bothriochloa ambigua, you might want to consider other well-documented beardgrass species that offer known benefits:

  • Little Bluestem (Schizachyrium scoparium) – A beloved native grass with stunning fall color
  • Big Bluestem (Andropogon gerardii) – A tall prairie grass perfect for naturalistic landscapes
  • Bothriochloa laguroides (Silver Beardgrass) – If you’re set on the Bothriochloa genus, this species has better documentation

The Takeaway

While Bothriochloa ambigua might sound intriguing, the lack of available information makes it a risky choice for most gardeners. When planning your landscape, it’s generally best to choose plants with well-documented characteristics, known ecological benefits, and established growing requirements.

If you’re passionate about supporting native ecosystems, focus on grasses and other plants with clear native status in your area. Your local native plant society or extension office can provide excellent recommendations for species that will thrive in your specific conditions while supporting local wildlife.

Sometimes the most responsible gardening choice is to admit when we don’t have enough information – and in the case of Bothriochloa ambigua, that honesty might just save you from a landscaping mystery you’d rather not solve through trial and error!

Bothriochloa Ambigua

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

Bothriochloa Kuntze - beardgrass

Species

Bothriochloa ambigua S.T. Blake [excluded]

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