North America Native Plant

San Benito Monardella

Botanical name: Monardella antonina benitensis

USDA symbol: MOANB

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Monardella benitensis Hardam (MOBE4)   

San Benito Monardella: A Rare California Native Worth Knowing About If you’ve stumbled across the name San Benito monardella (Monardella antonina benitensis) in your native plant research, you’ve discovered one of California’s more elusive botanical treasures. This perennial herb represents the fascinating world of rare native plants that call the ...

Rare plant alert!

Region: Conservation status by state

Status: S4T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals. ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

San Benito Monardella: A Rare California Native Worth Knowing About

If you’ve stumbled across the name San Benito monardella (Monardella antonina benitensis) in your native plant research, you’ve discovered one of California’s more elusive botanical treasures. This perennial herb represents the fascinating world of rare native plants that call the Golden State home, though growing it in your garden might be more challenging than you’d expect.

What Makes San Benito Monardella Special?

San Benito monardella is a native California perennial that belongs to the mint family, sharing relatives with the more commonly known wild mints and bee balms. As a forb herb, it’s a non-woody plant that returns year after year, likely forming small clumps or patches in its natural habitat.

This plant also goes by the scientific synonym Monardella benitensis, which you might encounter in older botanical references or specialized plant databases.

Where Does It Call Home?

True to its common name, this monardella is endemic to California. The San Benito in its name likely refers to San Benito County, suggesting this plant has very specific geographic ties to this region of central California.

The Rarity Factor: Why You Should Proceed with Caution

Here’s where things get interesting – and a bit concerning. San Benito monardella carries a conservation status that suggests it’s quite rare. With limited information available about this specific plant, it falls into that category of natives that are precious precisely because they’re so uncommon.

If you’re hoping to add this plant to your garden, here’s what you need to know:

  • Source any plants only from reputable native plant nurseries that can verify ethical collection practices
  • Never collect plants or seeds from wild populations
  • Consider that this plant’s specific growing requirements may be difficult to replicate in typical garden settings

What This Means for Your Garden

While the idea of growing a rare California native might sound appealing, the reality is that San Benito monardella might not be the best choice for most home gardens. The lack of readily available information about its care requirements, combined with its rarity, makes it a challenging plant for even experienced native gardeners.

Better Alternatives: Other Monardellas to Consider

If you’re drawn to the Monardella genus (and who wouldn’t be – they’re fantastic native plants!), consider these more readily available and better-documented alternatives:

  • Coyote mint (Monardella villosa) – widely available and pollinator-friendly
  • Mountain monardella (Monardella odoratissima) – aromatic and beautiful in rock gardens
  • Curly-leaf monardella (Monardella undulata) – unique foliage and easier to grow

The Bottom Line

San Benito monardella represents the incredible diversity of California’s native flora, but it’s one of those plants best appreciated from afar – or left to conservation efforts by botanical experts. If you’re passionate about supporting rare natives, consider donating to organizations that work to protect California’s endangered plant habitats rather than trying to grow this elusive beauty in your backyard.

For your garden, stick with the well-documented Monardella species that will thrive in cultivation while still providing all the benefits of native plants – supporting local wildlife, conserving water, and creating beautiful, sustainable landscapes.

San Benito Monardella

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Lamiales

Family

Lamiaceae Martinov - Mint family

Genus

Monardella Benth. - monardella

Species

Monardella antonina Hardham - San Antonio Hills monardella

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