North America Native Plant

Mariposa Monkeyflower

Botanical name: Mimulus grayi

USDA symbol: MIGR4

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Mariposa Monkeyflower: A Charming but Vulnerable California Native Meet the Mariposa monkeyflower (Mimulus grayi), a delightful little annual that’s as charming as its name suggests. This native California wildflower might be small in stature, but it packs a big punch when it comes to supporting local ecosystems and adding authentic ...

Rare plant alert!

Region: Conservation status by state

Status: S3: Status is uncertain but is somewhere between the following rankings: 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 ⚘

Mariposa Monkeyflower: A Charming but Vulnerable California Native

Meet the Mariposa monkeyflower (Mimulus grayi), a delightful little annual that’s as charming as its name suggests. This native California wildflower might be small in stature, but it packs a big punch when it comes to supporting local ecosystems and adding authentic Golden State character to your garden.

What Makes Mariposa Monkeyflower Special?

The Mariposa monkeyflower is a true California native, found exclusively within the Golden State’s borders. As an annual forb—basically a non-woody flowering plant—it completes its entire life cycle in just one growing season, making it a fast-acting addition to any native garden.

This little wildflower belongs to the monkeyflower family, known for their distinctive tubular blooms that pollinators absolutely adore. While it may not be the showiest plant in your garden, its authentic native status makes it a valuable contributor to local biodiversity.

A Word of Caution: Handle with Care

Before you rush out to plant Mariposa monkeyflower, there’s something important you need to know. This species has a Global Conservation Status of S3, which means it’s considered vulnerable. With only 21 to 100 known occurrences and between 3,000 and 10,000 individuals in the wild, this little plant needs our protection.

If you’re interested in growing Mariposa monkeyflower, please ensure you source seeds or plants from reputable native plant nurseries that practice responsible collection methods. Never collect from wild populations—every plant counts when it comes to species this rare.

Where Does It Belong in Your Garden?

Mariposa monkeyflower is perfect for:

  • Native California wildflower gardens
  • Rock gardens and naturalized areas
  • Pollinator-friendly landscapes
  • Educational or conservation-focused gardens

As an annual, it’s ideal for gardeners who enjoy the excitement of seasonal change and don’t mind replanting each year (though it may self-seed if conditions are right).

Growing Your Mariposa Monkeyflower

While specific growing requirements for Mimulus grayi aren’t well-documented, most California native annuals thrive with similar care approaches:

  • Climate zones: Best suited for USDA zones 8-10, matching California’s Mediterranean climate
  • Soil: Well-draining soils are typically preferred by California natives
  • Water: Likely follows California’s natural rainfall patterns—winter moisture, summer drought tolerance
  • Sun exposure: Most monkeyflowers appreciate partial shade to full sun
  • Maintenance: As an annual, minimal care is needed once established

Supporting Pollinators and Wildlife

Like other members of the monkeyflower family, Mariposa monkeyflower likely attracts a variety of beneficial insects including native bees and butterflies. These small-flowered annuals may seem modest, but they’re often essential food sources for smaller pollinators that larger, showier flowers can’t accommodate.

The Bottom Line

Mariposa monkeyflower is a wonderful choice for dedicated native plant gardeners who want to support California’s botanical heritage. However, its vulnerable conservation status means this isn’t a plant for casual gardening—it’s for those committed to responsible native plant stewardship.

If you’re new to native gardening or looking for easier-to-source alternatives, consider starting with more common California native annuals like California poppies or lupines. But if you’re ready to take on the responsibility of growing a vulnerable species with properly sourced material, Mariposa monkeyflower offers the unique satisfaction of helping preserve a piece of California’s irreplaceable natural heritage.

Mariposa Monkeyflower

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

Scrophulariales

Family

Scrophulariaceae Juss. - Figwort family

Genus

Mimulus L. - monkeyflower

Species

Mimulus grayi A.L. Grant - Mariposa monkeyflower

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