North America Native Plant

Slenderstalk Monkeyflower

Botanical name: Mimulus gracilipes

USDA symbol: MIGR3

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Slenderstalk Monkeyflower: A Delicate California Native Worth Protecting Meet the slenderstalk monkeyflower (Mimulus gracilipes), a charming little California native that’s as graceful as its name suggests. This delicate annual wildflower might not be the showiest plant in your garden, but it packs a punch when it comes to supporting local ...

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 ⚘

Slenderstalk Monkeyflower: A Delicate California Native Worth Protecting

Meet the slenderstalk monkeyflower (Mimulus gracilipes), a charming little California native that’s as graceful as its name suggests. This delicate annual wildflower might not be the showiest plant in your garden, but it packs a punch when it comes to supporting local ecosystems and adding authentic California character to your landscape.

What Makes Slenderstalk Monkeyflower Special?

As a true California native found exclusively in the Golden State, slenderstalk monkeyflower represents the kind of plant that once carpeted our foothills and valleys. This herbaceous annual forb produces small, cheerful yellow flowers on slender stems that dance in the breeze—hence the gracilipes (meaning slender-footed) in its scientific name.

The plant is currently distributed throughout California, from the Sierra Nevada foothills to parts of the Central Valley.

A Word of Caution: This Plant Needs Our Help

Before we dive into growing tips, here’s something important to know: slenderstalk monkeyflower has a conservation status of S2S3, which indicates it’s considered rare to uncommon in its native range. This means if you’re interested in growing this beautiful native, you should only source seeds or plants from reputable native plant nurseries that practice responsible collection methods. Never collect from wild populations.

Why Grow Slenderstalk Monkeyflower?

Despite its rarity concerns, there are compelling reasons to include this plant in your native garden:

  • Authentic native appeal: Support California’s natural heritage by growing true local natives
  • Pollinator magnet: The small flowers attract native bees and other beneficial insects
  • Low maintenance: Once established, this annual requires minimal care
  • Natural beauty: Adds delicate texture and movement to wildflower gardens
  • Conservation impact: Growing rare natives helps preserve genetic diversity

Perfect Garden Settings

Slenderstalk monkeyflower shines in several garden styles:

  • Native California wildflower gardens
  • Naturalized meadow areas
  • Drought-tolerant landscape borders
  • Native plant collections and botanical gardens
  • Restoration projects in appropriate regions

Growing Conditions and Care

This California native is surprisingly adaptable once you understand its preferences:

Climate: Thrives in USDA hardiness zones 8-10, which encompasses most of California’s mediterranean and semi-arid regions.

Light requirements: Performs well in partial shade to full sun conditions, making it versatile for different garden spots.

Soil needs: Prefers well-draining soils typical of California’s natural habitats. Heavy clay or consistently wet soils are not ideal.

Water requirements: Moderate water during the growing season, but avoid overwatering. Once established, it can handle typical California dry periods.

Planting and Propagation Tips

Growing slenderstalk monkeyflower successfully requires timing and patience:

  • Seeding time: Direct sow seeds in fall to allow for natural winter stratification
  • Seed preparation: Seeds may benefit from cold stratification if spring planting
  • Planting depth: Sow seeds lightly on the surface or barely cover
  • Germination: Be patient—native annuals can be slow to establish
  • Self-seeding: Allow plants to go to seed for natural recruitment

The Bottom Line

Slenderstalk monkeyflower might not be the easiest native to find or grow, but it’s absolutely worth the effort for dedicated native plant gardeners. Its delicate beauty, pollinator benefits, and authentic California heritage make it a special addition to the right garden. Just remember to source responsibly and give this rare gem the care it deserves.

By choosing to grow rare natives like slenderstalk monkeyflower, you’re not just creating a beautiful garden—you’re participating in conservation efforts that help preserve California’s unique botanical heritage for future generations.

Slenderstalk 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 gracilipes B.L. Rob. - slenderstalk monkeyflower

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