North America Non-native Plant

False Brome

Botanical name: Brachypodium rupestre caespitosum var.

USDA symbol: BRRUC2

Life cycle: perennial

Habit: grass

Native status: Non-native, reproduces and persists in the wild in the lower 48 states  

Synonyms: Brachypodium caespitosum (Host) Roem. & Schult., orth. var. (BRCA26)  âš˜  Brachypodum caespitosum (Host) Roem. & Schult., database artifact (BRCA29)  âš˜  Brachypodium cespitosum (Host) Roem. & Schult. (BRCE3)  âš˜  Brachypodium pinnatum (L.) P. Beauv. ssp. cespitosum (Host) Hack. (BRPIC2)  âš˜  Brachypodium rupestre (Host) Roem. & Schult. ssp. cespitosum (Host) H. Scholz (BRRUC)   

False Brome: A Non-Native Grass Worth Considering (Maybe) Meet false brome (Brachypodium rupestre caespitosum var.), a perennial grass that’s made itself at home in California despite not being a native to North America. This particular variety of false brome is one of those plants that sits in the it’s complicated ...

False Brome: A Non-Native Grass Worth Considering (Maybe)

Meet false brome (Brachypodium rupestre caespitosum var.), a perennial grass that’s made itself at home in California despite not being a native to North America. This particular variety of false brome is one of those plants that sits in the it’s complicated category when it comes to gardening decisions.

What’s in a Name?

False brome goes by its scientific name Brachypodium rupestre caespitosum var., and it’s got quite the collection of synonyms that botanists have used over the years. You might see it listed as Brachypodium caespitosum, Brachypodium cespitosum, or several other variations – proof that even scientists sometimes can’t make up their minds about what to call things!

Where You’ll Find It

Currently, this grass has established itself in California, where it reproduces on its own in the wild. As a non-native species that’s made itself at home, it’s what we call naturalized – basically, it’s moved in and decided to stay.

The Garden Dilemma

Here’s where things get interesting (and a bit frustrating): we don’t have much specific information about this particular variety’s garden performance, growth habits, or potential impacts. It’s like trying to review a restaurant that doesn’t have a menu posted – you know it exists, but the details are pretty sketchy.

What we do know is that it’s a perennial grass, which means it comes back year after year once established. Beyond that basic fact, specifics about its appearance, size, growing requirements, and garden behavior remain largely unknown.

To Plant or Not to Plant?

Since this is a non-native species without clear information about its invasive potential or garden value, you might want to pause before adding it to your shopping list. While we can’t definitively say it’s problematic, the lack of detailed information about its behavior and benefits makes it a bit of a wildcard.

Consider Native Alternatives

Instead of taking a chance on false brome, why not explore some of California’s fantastic native grasses? Options like:

  • California fescue (Festuca californica)
  • Purple needlegrass (Stipa pulchra)
  • Blue wildrye (Elymus glaucus)
  • California oatgrass (Danthonia californica)

These native beauties offer known benefits to local wildlife, proven garden performance, and the satisfaction of supporting your local ecosystem.

The Bottom Line

False brome falls into that tricky category of plants that aren’t necessarily bad but aren’t clearly good either. With so many wonderful native grass options available, it might be worth skipping this one in favor of species with better-documented garden value and ecological benefits. After all, why gamble when you can bet on a sure thing with native plants that have evolved to thrive in your local conditions?

If you’re absolutely determined to try false brome, proceed with caution and keep an eye on how it behaves in your garden. Sometimes the most responsible approach is simply to choose plants we know will play nicely with their neighbors – both in your garden and in the broader landscape.

False Brome

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

Brachypodium P. Beauv. - false brome

Species

Brachypodium rupestre (Host) Roem. & Schult. - false brome

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