North America Native Plant

Rattan’s Monkeyflower

Botanical name: Mimulus rattanii var. rattanii

USDA symbol: MIRAR

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Eunanus rattanii (A. Gray) Greene (EURA6)   

Rattan’s Monkeyflower: A Charming California Native Annual If you’re looking to add authentic California charm to your native garden, Rattan’s monkeyflower (Mimulus rattanii var. rattanii) might just be the delightful annual you’ve been searching for. This petite wildflower brings the spirit of California’s natural landscapes right to your backyard, though ...

Rare plant alert!

Region: Conservation status by state

Status: S4T3?Q: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ Uncertain taxonomy: ⚘ 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 ⚘

Rattan’s Monkeyflower: A Charming California Native Annual

If you’re looking to add authentic California charm to your native garden, Rattan’s monkeyflower (Mimulus rattanii var. rattanii) might just be the delightful annual you’ve been searching for. This petite wildflower brings the spirit of California’s natural landscapes right to your backyard, though it comes with a few important considerations for the responsible gardener.

Meet This California Original

Rattan’s monkeyflower is a true California native, found exclusively within the Golden State’s diverse ecosystems. As an annual forb, this herbaceous plant completes its entire life cycle in one growing season, making it a perfect choice for gardeners who enjoy the excitement of replanting and redesigning their spaces each year.

This charming wildflower belongs to the monkeyflower family, and while it may also go by the scientific synonym Eunanus rattanii, it’s the same delightful plant that has been gracing California’s landscapes for generations.

Where You’ll Find It Growing Wild

This special monkeyflower calls California home, thriving in the state’s varied climate zones and terrain. Its natural distribution is limited to California, making it a truly regional treasure for native plant enthusiasts.

A Word About Conservation

Here’s something important every responsible gardener should know: Rattan’s monkeyflower has a conservation status that suggests it may face some population pressures in the wild. While this shouldn’t discourage you from growing it, it does mean you should be extra careful about where you source your seeds or plants.

Always purchase from reputable native plant nurseries that practice ethical collection methods, or better yet, look for nursery-propagated stock. Never collect seeds or plants from wild populations.

Garden Appeal and Design Ideas

As a low-growing forb, Rattan’s monkeyflower works beautifully in several garden settings:

  • Native wildflower meadows and naturalized areas
  • Rock gardens where its modest size won’t be overwhelmed
  • Seasonal color patches that change each year
  • Pollinator gardens supporting California’s native bee species

The plant’s annual nature means you can experiment with different combinations each year, making it perfect for gardeners who love to switch things up seasonally.

Growing Rattan’s Monkeyflower

While specific growing information for this variety can be limited, following general guidelines for California native annuals will set you up for success:

Climate Needs: Best suited for USDA hardiness zones 8-10, matching California’s Mediterranean climate patterns.

Soil Preferences: Like most California natives, it likely prefers well-draining soil. Heavy clay or constantly wet conditions probably won’t make it happy.

Water Requirements: As with many California natives, it’s probably adapted to seasonal rainfall patterns. Provide regular water during establishment, then reduce watering as the plant matures.

Sun Exposure: Most monkeyflowers appreciate partial shade to full sun, depending on your local climate intensity.

Planting and Care Tips

  • Start seeds in fall or early spring to align with natural rainfall patterns
  • Prepare planting areas by removing weeds and improving drainage if needed
  • Water gently but consistently until plants are established
  • Allow plants to set seed if you want them to potentially self-sow for next year
  • Clean up spent plants after they’ve completed their cycle

Supporting Local Wildlife

While specific wildlife benefits aren’t well-documented for this particular variety, monkeyflowers in general are known to support local pollinators, especially native bees. By growing Rattan’s monkeyflower, you’re likely providing nectar and pollen for California’s native insects.

Is This Plant Right for Your Garden?

Rattan’s monkeyflower could be perfect for you if:

  • You’re passionate about growing true California natives
  • You enjoy the seasonal rhythm of annual flowers
  • You want to support local pollinators with authentic regional plants
  • You’re comfortable with plants that may require some patience to source responsibly

However, you might want to consider other options if you’re looking for a low-maintenance perennial or if you have trouble finding ethically sourced material.

The Bottom Line

Rattan’s monkeyflower offers California gardeners a chance to grow something truly special – a plant that belongs specifically to their region’s natural heritage. While it may require a bit more effort to source responsibly and might not have the extensive growing information of more common plants, the reward is a genuine piece of California’s botanical identity blooming in your own garden.

Remember, every native plant we grow is a small step toward supporting our local ecosystems and preserving the natural beauty that makes California unique. Just make sure you’re doing it responsibly by sourcing your plants from reputable growers who share your conservation values.

Rattan’s 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 rattanii A. Gray - Rattan's monkeyflower

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