North America Native Plant

Mackenzie’s Phacelia

Botanical name: Phacelia lutea var. mackenzieorum

USDA symbol: PHLUM

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

MacKenzie’s Phacelia: A Rare Oregon Native Worth Knowing If you’re passionate about native plants and live in Oregon, you might be curious about MacKenzie’s phacelia (Phacelia lutea var. mackenzieorum). This little-known annual wildflower represents one of those special plants that makes Oregon’s flora so unique and diverse. What Makes MacKenzie’s ...

Rare plant alert!

Region: Conservation status by state

Status: S4T1: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

MacKenzie’s Phacelia: A Rare Oregon Native Worth Knowing

If you’re passionate about native plants and live in Oregon, you might be curious about MacKenzie’s phacelia (Phacelia lutea var. mackenzieorum). This little-known annual wildflower represents one of those special plants that makes Oregon’s flora so unique and diverse.

What Makes MacKenzie’s Phacelia Special?

MacKenzie’s phacelia is a native annual forb, meaning it’s a non-woody herbaceous plant that completes its entire life cycle in one growing season. As part of the waterleaf family (Hydrophyllaceae), it shares characteristics with other beloved native phacelias that gardeners often seek out for their wildlife value.

Where Does It Grow?

This particular variety is endemic to Oregon, making it a true regional treasure. Its limited geographic distribution means you won’t find it growing wild anywhere else in the world – just in the beautiful landscapes of the Pacific Northwest’s Oregon region.

A Word of Caution: Rarity Matters

Before you get too excited about adding MacKenzie’s phacelia to your garden, there’s something important to know. This plant has a Global Conservation Status of S4T1, indicating it’s quite rare. While this rarity makes it botanically fascinating, it also means we need to be extra thoughtful about how we approach growing it.

If you’re interested in cultivating MacKenzie’s phacelia, here are some key considerations:

  • Only source seeds or plants from reputable native plant nurseries that practice ethical collection
  • Never collect from wild populations
  • Consider participating in seed banking or conservation efforts if you do grow it
  • Check with local native plant societies about conservation protocols

Garden Potential and Alternatives

While specific growing information for MacKenzie’s phacelia is limited due to its rarity, annual phacelias in general tend to be relatively easy to grow from seed. They typically prefer well-draining soils and can handle various light conditions.

If you’re drawn to the idea of growing rare Oregon natives but want something more readily available, consider these alternatives:

  • Other Phacelia species native to Oregon
  • Native wildflower mixes designed for your specific Oregon region
  • Working with local conservation groups on habitat restoration projects

Supporting Native Plant Conservation

Sometimes the best way to appreciate a rare plant like MacKenzie’s phacelia is to support its conservation in the wild rather than trying to grow it at home. Consider:

  • Volunteering with local native plant societies
  • Supporting habitat preservation efforts in Oregon
  • Learning about and growing other native Oregon wildflowers
  • Participating in citizen science projects that monitor rare plant populations

MacKenzie’s phacelia reminds us that our native flora includes many hidden gems – plants that might not be household names but play important roles in local ecosystems. While you may not end up growing this particular variety in your garden, learning about it can deepen your appreciation for Oregon’s remarkable plant diversity and inspire you to explore other native options that are more suitable for cultivation.

Mackenzie’s 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 lutea (Hook. & Arn.) J.T. Howell - yellow phacelia

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