North America Native Plant

Widethroat Pink Monkeyflower

Botanical name: Mimulus platylaemus

USDA symbol: MIPL

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Widethroat Pink Monkeyflower: A Rare California Native Worth Seeking Meet the widethroat pink monkeyflower (Mimulus platylaemus), a charming California native that’s as special as its distinctive name suggests. This delicate annual wildflower is one of those hidden gems of the native plant world – not flashy or attention-grabbing, but absolutely ...

Rare plant alert!

Region: Conservation status by state

Status: S3?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ 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 ⚘

Widethroat Pink Monkeyflower: A Rare California Native Worth Seeking

Meet the widethroat pink monkeyflower (Mimulus platylaemus), a charming California native that’s as special as its distinctive name suggests. This delicate annual wildflower is one of those hidden gems of the native plant world – not flashy or attention-grabbing, but absolutely essential for those looking to create authentic California ecosystems in their gardens.

What Makes This Monkeyflower Special

The widethroat pink monkeyflower belongs to the beloved monkeyflower family, known for their cheerful, tubular blooms that seem to have little faces peering back at you. True to its name, this species features pink to rose-colored flowers with a notably wide throat – the opening of the flower tube. As a forb (a fancy term for a soft-stemmed flowering plant), it brings delicate texture and seasonal color to native plantings.

What sets this species apart from its more common cousins is its rarity. With a conservation status that’s still being defined, this little annual deserves our attention and protection.

Where You’ll Find It Growing Wild

This monkeyflower is a true California endemic, meaning it calls the Golden State home and nowhere else. It’s found in specific regions throughout California, though its exact distribution is still being studied by botanists.

A Word About Rarity

Here’s something important to know before you fall in love with this plant: the widethroat pink monkeyflower has a Global Conservation Status of S3?, which means its conservation status is still being determined. This suggests it may be uncommon or potentially at risk.

If you’re considering adding this beauty to your garden, please ensure you source it responsibly. This means:

  • Purchase only from reputable native plant nurseries
  • Never collect seeds or plants from wild populations
  • Ask your supplier about the origin of their plant material
  • Consider growing it to help preserve the species through cultivation

Growing Widethroat Pink Monkeyflower

As a California native annual, this monkeyflower follows the state’s natural rhythm of winter rains and summer drought. Here’s what you need to know to grow it successfully:

Ideal Growing Conditions

  • Climate zones: Best suited for USDA zones 8-10, matching California’s Mediterranean climate
  • Sunlight: Likely prefers partial shade to full sun
  • Soil: Probably thrives in moist to seasonally wet soils during its growing season
  • Water: Needs regular moisture during winter and spring growing season

Planting and Care Tips

Since this is an annual plant, you’ll need to replant it each year or allow it to self-seed. In California’s climate, fall or early winter planting typically works best, allowing the plant to take advantage of natural winter rains.

The key to success is mimicking its natural habitat as closely as possible. Provide consistent moisture during its active growing season, then allow it to complete its life cycle and set seed for the following year.

Garden Design and Landscape Role

The widethroat pink monkeyflower shines in:

  • California native plant gardens
  • Wildflower meadows and naturalistic landscapes
  • Specialized collections of rare native plants
  • Educational gardens focused on conservation

While it may not provide the bold statement of larger perennials, its delicate charm and ecological importance make it a valuable addition to any serious native plant collection.

Supporting Local Wildlife

Like other members of the monkeyflower family, this species likely attracts hummingbirds and native bees with its tubular flowers. By growing rare native plants like this one, you’re helping provide habitat and food sources that support California’s unique web of native wildlife relationships.

The Bottom Line

The widethroat pink monkeyflower may not be the easiest native plant to find or grow, but for dedicated native plant gardeners in California, it represents something precious: a chance to help preserve a unique piece of the state’s natural heritage right in your own backyard. If you can source it responsibly and provide the right growing conditions, you’ll be rewarded with delicate beauty and the satisfaction of supporting conservation through cultivation.

Just remember to always put conservation first – this little gem is more important in the wild than in our gardens, but responsible cultivation can help ensure future generations get to enjoy its quiet charm.

Widethroat Pink 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 platylaemus Pennell - widethroat pink monkeyflower

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