North America Native Plant

Imbricate Phacelia

Botanical name: Phacelia imbricata patula

USDA symbol: PHIMP

Life cycle: annual

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Phacelia californica Cham. var. patula (Brand) Jeps. (PHCAP3)  âš˜  Phacelia oreopola Heckard (PHOR3)   

Imbricate Phacelia: A California Native Worth Getting to Know If you’re looking to add some authentic California charm to your native plant garden, let me introduce you to imbricate phacelia (Phacelia imbricata patula). This lesser-known native wildflower might not be the most famous member of the phacelia family, but it ...

Imbricate Phacelia: A California Native Worth Getting to Know

If you’re looking to add some authentic California charm to your native plant garden, let me introduce you to imbricate phacelia (Phacelia imbricata patula). This lesser-known native wildflower might not be the most famous member of the phacelia family, but it deserves a spot in the conversation about regional native gardening.

What Exactly Is Imbricate Phacelia?

Imbricate phacelia is a native forb – basically a fancy botanical term for a non-woody flowering plant. You might also see it referenced under its scientific synonyms Phacelia californica var. patula or Phacelia oreopola in older gardening guides, but don’t let the name variations confuse you. It’s the same charming California native we’re talking about.

This plant has an interesting dual personality when it comes to its lifespan – it can behave as either an annual or perennial, depending on growing conditions. Think of it as nature’s way of being flexible!

Where Does It Call Home?

As a true California native, imbricate phacelia is naturally found throughout the Golden State. This plant has evolved specifically to thrive in California’s unique climate and soil conditions, making it a perfect choice for gardeners wanting to support local ecosystems and create authentic regional landscapes.

Why Consider Growing Imbricate Phacelia?

Here’s where I’ll be honest with you – specific information about this particular variety is somewhat limited in mainstream gardening resources. However, that doesn’t mean it’s not worth considering! Here are some compelling reasons to give it a try:

  • It’s a true California native, supporting local biodiversity
  • As a forb, it adds textural variety to native plant gardens
  • Its flexible annual/perennial nature means it can adapt to different garden conditions
  • Being part of the phacelia family, it likely shares beneficial traits with its well-known cousins

Garden Design and Landscape Role

While specific design recommendations for this variety are limited, native forbs like imbricate phacelia typically work beautifully in:

  • Native plant gardens and naturalized landscapes
  • Wildlife habitat gardens
  • Restoration projects focusing on California flora
  • Mixed native perennial borders

As a forb, it likely provides a nice contrast to shrubs and adds seasonal interest with its flowering display.

The Growing Challenge

Here’s where I need to level with you – finding detailed growing information specifically for Phacelia imbricata patula is tricky. The limited availability of cultivation details suggests this might be more of a specialist’s plant or one that’s primarily found in restoration contexts rather than typical home gardens.

If you’re interested in growing imbricate phacelia, I’d recommend:

  • Contacting local native plant societies in California
  • Reaching out to native plant nurseries specializing in rare or uncommon California species
  • Checking with botanical gardens or restoration organizations
  • Considering well-documented phacelia relatives as alternatives

The Bottom Line

Imbricate phacelia represents the fascinating diversity of California’s native flora, even if it’s not the easiest plant to research or source. For dedicated native plant enthusiasts, especially those involved in habitat restoration or specialized native gardening, it could be a worthwhile addition to the palette.

However, if you’re new to native gardening or looking for readily available options, you might want to start with better-documented phacelia species and work your way up to the more mysterious varieties like imbricate phacelia.

Sometimes the most rewarding plants are the ones that require a little detective work – and imbricate phacelia definitely fits that bill!

Imbricate Phacelia

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

Solanales

Family

Hydrophyllaceae R. Br. - Waterleaf family

Genus

Phacelia Juss. - phacelia

Species

Phacelia imbricata Greene - imbricate phacelia

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