North America Native Plant

Santa Cruz Island Monkeyflower

Botanical name: Mimulus brandegeei

USDA symbol: MIBR2

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Santa Cruz Island Monkeyflower: A Rare California Native Worth Growing Responsibly If you’re passionate about native California plants and love the idea of growing something truly special, the Santa Cruz Island monkeyflower might just capture your heart. This charming little annual, scientifically known as Mimulus brandegeei, brings a piece of ...

Rare plant alert!

Region: Conservation status by state

Status: SXQ: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ Presumed Extinct: Believed to be extinct. Not located despite intensive searches and virtually no likelihood that it will be rediscovered ⚘

Santa Cruz Island Monkeyflower: A Rare California Native Worth Growing Responsibly

If you’re passionate about native California plants and love the idea of growing something truly special, the Santa Cruz Island monkeyflower might just capture your heart. This charming little annual, scientifically known as Mimulus brandegeei, brings a piece of the Channel Islands’ unique ecosystem right to your garden.

What Makes This Plant Special?

The Santa Cruz Island monkeyflower is a native California forb—basically a soft-stemmed flowering plant that completes its entire life cycle in just one growing season. What makes it particularly fascinating is its incredibly limited natural range and the sunny disposition of its small, tubular yellow flowers that bloom in spring.

As an annual, this plant grows quickly from seed, produces its cheerful blooms, sets seed, and then completes its cycle, often leaving behind seeds for the next generation. It’s nature’s way of ensuring this special species continues to brighten the landscape year after year.

Where Does It Come From?

This monkeyflower is endemic to California, specifically the Channel Islands. Its native range is incredibly restricted, making it a true botanical treasure of the Golden State.

Important Conservation Notice

Before you rush to add this beauty to your shopping list, there’s something crucial to know: the Santa Cruz Island monkeyflower has a conservation status that’s currently undefined, which suggests it may be quite rare in the wild. This means if you do decide to grow it, you should only source seeds or plants from reputable native plant nurseries that propagate their stock responsibly rather than wild-collecting.

Garden Appeal and Landscape Role

In the garden, this monkeyflower serves as a delightful accent plant that’s perfect for:

  • Native California plant gardens
  • Rock gardens with good drainage
  • Mediterranean-style landscapes
  • Channel Islands-themed plantings
  • Containers for a seasonal color display

Its compact size and cheerful yellow blooms make it ideal for adding pops of color to smaller spaces or as part of a diverse native plant community.

Growing Conditions and Care

Like many California natives, the Santa Cruz Island monkeyflower appreciates conditions that mimic its island home:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soil is essential—think Mediterranean conditions
  • Water: Drought-tolerant once established, but benefits from occasional deep watering
  • Climate: Best suited for USDA hardiness zones 9-11, particularly coastal California conditions

Planting and Care Tips

Growing this special monkeyflower successfully involves understanding its annual nature:

  • Start from seed in fall or early spring
  • Scatter seeds over prepared soil and lightly cover
  • Keep soil consistently moist during germination
  • Once established, reduce watering frequency
  • Allow plants to set seed if you want them to return next year
  • Deadhead spent blooms to encourage continued flowering

Benefits for Pollinators and Wildlife

The tubular yellow flowers of the Santa Cruz Island monkeyflower are perfectly designed to attract native California bees and other small pollinators. By growing this plant, you’re providing specialized habitat for local pollinator species that have co-evolved with California’s native flora.

Should You Grow It?

If you’re a dedicated native plant gardener in coastal California who sources plants responsibly, absolutely! This monkeyflower offers the unique opportunity to grow something truly special while supporting local pollinators. Just remember to purchase only from reputable sources that propagate their own stock.

For gardeners outside its natural climate range or those looking for easier alternatives, consider other Mimulus species that are more widely available and less conservation-sensitive, such as sticky monkeyflower or scarlet monkeyflower.

The Santa Cruz Island monkeyflower proves that sometimes the most special garden additions are the ones that connect us directly to the unique natural heritage of our region—when grown with care and respect for their wild origins.

Santa Cruz Island 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 brandegeei Pennell - Santa Cruz Island monkeyflower

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