North America Native Plant

Harlequin Monkeyflower

Botanical name: Mimulus whitneyi

USDA symbol: MIWH3

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Eunanus bicolor A. Gray (EUBI9)  âš˜  Mimulus nanus Hook. & Arn. var. bicolor (A. Gray) A. Gray (MINAB)   

Harlequin Monkeyflower: A Rare California Native Worth Knowing Meet the harlequin monkeyflower (Mimulus whitneyi), a charming little wildflower that brings a splash of mountain meadow magic to California gardens. This delightful annual native might be small in stature, but it packs a colorful punch that’ll make you smile every time ...

Rare plant alert!

Region: Conservation status by state

Status: S2S3: Status is uncertain but is somewhere between the following rankings: Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ 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 ⚘

Harlequin Monkeyflower: A Rare California Native Worth Knowing

Meet the harlequin monkeyflower (Mimulus whitneyi), a charming little wildflower that brings a splash of mountain meadow magic to California gardens. This delightful annual native might be small in stature, but it packs a colorful punch that’ll make you smile every time you spot its cheerful blooms.

What Makes This Little Beauty Special?

The harlequin monkeyflower gets its whimsical name from its distinctive flowers that look like they’ve been painted by a playful artist. These small, trumpet-shaped blooms typically feature bright yellow petals adorned with red or purple markings, creating that classic harlequin pattern that’s impossible to miss. As an annual forb, this herbaceous plant completes its entire life cycle in one growing season, making every bloom precious.

A True California Native

This special wildflower is exclusively native to California, where it naturally occurs in mountain meadows and alpine areas, particularly in the Sierra Nevada and northern California mountains. When you plant harlequin monkeyflower, you’re not just adding beauty to your garden – you’re supporting a piece of California’s natural heritage.

Important Conservation Note

Here’s something every responsible gardener should know: harlequin monkeyflower has a conservation status of S2S3, meaning it’s considered rare to uncommon in its native range. While we absolutely encourage growing this beautiful native, please make sure you source seeds or plants from reputable native plant nurseries that collect responsibly. Never collect seeds from wild populations – let’s help preserve this special plant for future generations to enjoy.

Why Consider Harlequin Monkeyflower for Your Garden?

If you’re creating a native California garden or want to support local wildlife, here’s why this little gem deserves a spot:

  • Pollinator magnet: Those colorful blooms attract native bees and other small pollinators
  • Authentic California character: Perfect for naturalized areas and wildflower meadows
  • Rock garden star: Ideal for well-drained alpine or rock garden settings
  • Low maintenance: As an annual, it doesn’t require long-term care commitments

Growing Your Harlequin Monkeyflower

Successfully growing this mountain native is easier than you might think, especially if you can mimic its natural mountain meadow conditions:

Ideal Growing Conditions

  • Sunlight: Full sun to partial shade
  • Soil: Well-drained soils (essential – these plants hate soggy feet!)
  • Water: Moderate water during the growing season, then allow to dry as it completes its cycle
  • Climate zones: USDA zones 7-9, perfect for most of California

Planting and Care Tips

The best approach is direct sowing, which mimics how these plants naturally establish:

  • Sow seeds in fall or early spring when soil is cool and moist
  • Scatter seeds on prepared soil surface – they need light to germinate
  • Keep soil consistently moist until germination occurs
  • Once established, reduce watering and let the plants follow their natural annual cycle
  • Allow plants to set seed for potential self-sowing next season

Perfect Garden Companions

Harlequin monkeyflower shines in native California plant communities. Consider pairing it with other mountain natives like California poppies, lupines, and native grasses to create an authentic Sierra Nevada meadow feel right in your backyard.

The Bottom Line

While harlequin monkeyflower might be a rare find, it’s absolutely worth seeking out from responsible sources. This charming annual offers authentic California beauty, supports native pollinators, and brings a touch of mountain meadow magic to specialized garden settings. Just remember to source responsibly and enjoy watching this little treasure bring its harlequin colors to your native garden palette.

Harlequin 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 whitneyi A. Gray - harlequin monkeyflower

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