North America Native Plant

Roundleaf Monkeyflower

Botanical name: Mimulus glabratus var. glabratus

USDA symbol: MIGLG

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Mimulus glabratus Kunth ssp. typicus Pennell (MIGLT)  âš˜  Mimulus glabratus Kunth ssp. utahensis Pennell (MIGLU)  âš˜  Mimulus jamesii Torr. & A. Gray ex Benth. var. texensis A. Gray (MIJAT)   

Roundleaf Monkeyflower: A Cheerful Native for Your Water Garden If you’re looking for a bright, cheerful native plant that thrives in those tricky wet spots in your garden, let me introduce you to the roundleaf monkeyflower (Mimulus glabratus var. glabratus). This delightful little perennial might just be the perfect solution ...

Roundleaf Monkeyflower: A Cheerful Native for Your Water Garden

If you’re looking for a bright, cheerful native plant that thrives in those tricky wet spots in your garden, let me introduce you to the roundleaf monkeyflower (Mimulus glabratus var. glabratus). This delightful little perennial might just be the perfect solution for that soggy corner where other plants struggle to survive.

What Makes Roundleaf Monkeyflower Special?

The roundleaf monkeyflower is a native gem that belongs to the southwestern United States. You’ll find this hardy perennial growing naturally across Arizona, California, Colorado, Nevada, New Mexico, Oklahoma, Texas, and Utah. As a true native, it’s perfectly adapted to our regional conditions and supports local wildlife in ways that non-native plants simply can’t match.

This herbaceous perennial forms low, spreading mats adorned with kidney-shaped to rounded leaves that give the plant its common name. But the real showstopper? Those bright yellow, tubular flowers that seem to grin at you like little monkey faces – hence the monkeyflower part of its name!

Why Your Garden (and Local Wildlife) Will Love It

Roundleaf monkeyflower isn’t just a pretty face. This native workhorse offers several compelling reasons to earn a spot in your landscape:

  • Pollinator magnet: Those cheerful yellow blooms attract bees, butterflies, and even hummingbirds throughout the growing season
  • Long blooming period: Enjoy flowers from spring through fall with proper care
  • Problem solver: Perfect for those challenging wet areas where other plants might rot
  • Low maintenance: Once established, it’s relatively easy to care for
  • Native credentials: Supports local ecosystems and wildlife

Where Does Roundleaf Monkeyflower Shine?

This versatile native works beautifully in several garden settings:

  • Water gardens and bog gardens: Its natural love of moisture makes it perfect near ponds, streams, or water features
  • Rock gardens with irrigation: Creates lovely contrast against stones when kept consistently moist
  • Native plant gardens: Pairs wonderfully with other southwestern natives
  • Ground cover: Forms attractive mats in consistently moist areas

Growing Roundleaf Monkeyflower Successfully

The key to success with roundleaf monkeyflower is understanding its one non-negotiable requirement: consistent moisture. This isn’t a drought-tolerant plant, despite its southwestern origins.

Ideal Growing Conditions

  • Sunlight: Full sun to partial shade (appreciates some afternoon shade in hot climates)
  • Water: Consistent moisture to wet conditions – think happy feet always wet
  • Soil: Adaptable to various soil types as long as they stay moist
  • Climate: Hardy in USDA zones 5-9

Planting and Care Tips

When to plant: Spring is ideal, giving the plant time to establish before summer heat.

Watering: This is where roundleaf monkeyflower differs from many natives – it actually needs regular water! Keep the soil consistently moist, and don’t let it dry out completely.

Maintenance: Generally low-maintenance once established. The plant may go dormant during extreme heat, which is normal. Consider dividing clumps every few years to maintain vigor and spread your colony.

A Few Things to Keep in Mind

While roundleaf monkeyflower is a wonderful native plant, it’s not suitable for xeriscaping or drought-tolerant gardens due to its moisture requirements. If you’re looking for a truly water-wise native, you’ll want to consider other options.

Also, like many monkeyflowers, this species can be a bit particular about its growing conditions. Success really depends on your ability to provide consistent moisture.

The Bottom Line

Roundleaf monkeyflower is a delightful native choice for gardeners who have wet or consistently moist areas to plant. Its cheerful yellow flowers, pollinator appeal, and native status make it a valuable addition to the right garden setting. Just remember – this little monkey needs its water!

If you have a water garden, bog area, or simply a spot that stays naturally moist, roundleaf monkeyflower could be exactly what you need to turn that challenging area into a bright, wildlife-friendly feature of your landscape.

Roundleaf 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 glabratus Kunth - roundleaf monkeyflower

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