North America Native Plant

Rattan’s Monkeyflower

Botanical name: Mimulus rattanii var. decurtatus

USDA symbol: MIRAD2

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Mimulus decurtatus A.L. Grant (MIDE12)  âš˜  Mimulus rattanii A. Gray ssp. decurtatus (A.L. Grant) Pennell (MIRAD)   

Rattan’s Monkeyflower: A Rare California Native Worth Growing Meet Rattan’s monkeyflower (Mimulus rattanii var. decurtatus), a charming little annual that’s as unique as its name suggests. This California native might not be the flashiest flower in the garden, but it holds a special place in the Golden State’s botanical heritage ...

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 ⚘

Rattan’s Monkeyflower: A Rare California Native Worth Growing

Meet Rattan’s monkeyflower (Mimulus rattanii var. decurtatus), a charming little annual that’s as unique as its name suggests. This California native might not be the flashiest flower in the garden, but it holds a special place in the Golden State’s botanical heritage – and perhaps should earn a spot in your native plant garden too.

What Makes Rattan’s Monkeyflower Special?

This delightful annual forb belongs to the beloved monkeyflower family, known for their cheerful, snapdragon-like blooms. As a true California native, Rattan’s monkeyflower has been quietly beautifying the state’s landscapes long before any of us started thinking about native plant gardening. Unlike perennial plants that stick around year after year, this annual completes its entire life cycle in a single growing season, making it a perfect candidate for gardeners who like a bit of change in their landscape.

Where Does It Call Home?

Rattan’s monkeyflower is exclusively Californian – you won’t find this particular variety growing wild anywhere else in the world. This makes it a true treasure for Golden State gardeners looking to create authentic native plant communities in their yards.

A Word About Rarity

Here’s something important to keep in mind: Rattan’s monkeyflower has a Global Conservation Status of S4T3, which indicates it’s not exactly common in the wild. This doesn’t mean you shouldn’t grow it – quite the opposite! Growing rare native plants in our gardens can actually help support their conservation. However, it does mean you should be thoughtful about sourcing your seeds or plants.

Always purchase from reputable native plant nurseries that practice responsible propagation methods. Never collect seeds or plants from wild populations, as this can harm already vulnerable native communities.

Why Grow Rattan’s Monkeyflower?

If you’re wondering whether this little annual deserves space in your garden, here are some compelling reasons to give it a try:

  • It’s a true California native, supporting local ecosystems
  • Annual flowers provide seasonal interest and change
  • Monkeyflowers typically attract native pollinators
  • Perfect for native plant gardens and naturalistic landscapes
  • Growing it helps support conservation of a less common native species

Growing Rattan’s Monkeyflower Successfully

While specific growing information for this particular variety is limited, we can draw on what we know about monkeyflowers in general and California native annuals to give you the best shot at success.

Garden Design Ideas

Rattan’s monkeyflower works beautifully in:

  • Native California plant gardens
  • Wildflower meadows and naturalistic plantings
  • Rock gardens with good drainage
  • Mixed annual borders featuring California natives
  • Pollinator gardens designed for local species

The Bottom Line

Rattan’s monkeyflower might not be the easiest native plant to grow or the most widely available, but that’s exactly what makes it special. For dedicated native plant gardeners in California, this rare annual offers a chance to grow something truly unique while supporting the conservation of California’s botanical heritage.

Remember, the key to success with any rare native plant is starting with responsibly sourced material and being patient as you learn its preferences. Your efforts will be rewarded with the satisfaction of growing a piece of California’s natural history right in your own backyard.

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