North America Native Plant

Bristly Matilija Poppy

Botanical name: Romneya trichocalyx

USDA symbol: ROTR2

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Romneya coulteri Harv. var. trichocalyx (Eastw.) Jeps. (ROCOT)   

Bristly Matilija Poppy: California’s Spectacular Native Beauty If you’re dreaming of adding some serious flower power to your California garden, meet the bristly Matilija poppy (Romneya trichocalyx). This stunning native perennial shrub produces some of the most show-stopping blooms you’ll ever see – think dinner plate-sized white flowers with sunny ...

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 ⚘

Bristly Matilija Poppy: California’s Spectacular Native Beauty

If you’re dreaming of adding some serious flower power to your California garden, meet the bristly Matilija poppy (Romneya trichocalyx). This stunning native perennial shrub produces some of the most show-stopping blooms you’ll ever see – think dinner plate-sized white flowers with sunny yellow centers that look like they belong in a fairy tale.

What Makes the Bristly Matilija Poppy Special?

The bristly Matilija poppy is a true California native, naturally growing in the chaparral and coastal sage scrub communities of Southern California. As a perennial shrub, it typically grows to about 4-5 feet tall and can spread even wider, creating an impressive presence in any landscape.

What really sets this plant apart are those magnificent flowers – each bloom can reach 4-6 inches across with delicate, papery white petals surrounding a prominent golden center. The flowers are sweetly fragrant and appear from late spring through summer, creating a spectacular display that’s hard to ignore.

Where Does It Grow Naturally?

This beautiful native calls California home, where it thrives in the state’s Mediterranean climate. You’ll find it naturally occurring in chaparral and coastal sage scrub habitats throughout Southern California.

Is This the Right Plant for Your Garden?

The bristly Matilija poppy can be an amazing addition to the right garden, but it’s not for everyone. Here’s what you need to know:

Why You Might Love It:

  • Absolutely stunning, large white flowers that are real showstoppers
  • Native to California, supporting local ecosystems
  • Extremely drought-tolerant once established
  • Attracts beneficial pollinators like bees and butterflies
  • Fragrant blooms add another sensory dimension to your garden
  • Perfect for Mediterranean and xeriscape garden designs

Why You Might Want to Think Twice:

  • Can spread aggressively via underground rhizomes
  • Needs excellent drainage – soggy soil is a death sentence
  • Takes time to establish and may not bloom heavily in the first year
  • Can be difficult to find at nurseries

A Note About Conservation

The bristly Matilija poppy has a conservation status that suggests it may be somewhat uncommon in the wild. If you decide to grow this beauty, make sure you source your plants responsibly from reputable native plant nurseries rather than collecting from wild populations.

Perfect Garden Situations

This native beauty shines in:

  • Mediterranean-style gardens
  • Drought-tolerant landscapes
  • Native plant gardens
  • Large naturalized areas where it has room to spread
  • Wildlife-friendly gardens focused on supporting pollinators

Growing Conditions and Care

What It Needs to Thrive:

  • Sun: Full sun is absolutely essential
  • Soil: Well-draining soil is critical – sandy or rocky soils are ideal
  • Water: Drought-tolerant once established; avoid overwatering
  • Climate: Hardy in USDA zones 8-10
  • Space: Give it room to spread – this isn’t a plant for small spaces

Planting and Care Tips:

  • Plant in fall for best establishment
  • Improve drainage in heavy soils by adding sand or gravel
  • Water regularly the first year, then reduce dramatically
  • Cut back spent flowers to encourage more blooms
  • Don’t be discouraged if growth seems slow at first – patience pays off
  • Consider installing root barriers if you’re worried about spreading

The Bottom Line

The bristly Matilija poppy is a spectacular native plant that can be the crown jewel of the right garden. If you have the space, the right growing conditions, and appreciate plants that march to their own drummer, this could be your new garden superstar. Just remember to source responsibly and give it the well-draining conditions it craves.

For California gardeners looking to support native ecosystems while adding serious wow factor to their landscape, the bristly Matilija poppy offers an unbeatable combination of beauty, drought tolerance, and wildlife value. Just be prepared for neighbors stopping by to ask, What is that amazing flower?

Bristly Matilija Poppy

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Magnoliidae

Order

Papaverales

Family

Papaveraceae Juss. - Poppy family

Genus

Romneya Harv. - Matilija poppy

Species

Romneya trichocalyx Eastw. - bristly Matilija poppy

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