North America Native Plant

Buell Park Phacelia

Botanical name: Phacelia buellvivariensis

USDA symbol: PHBU5

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Buell Park Phacelia: A Rare Arizona Wildflower Worth Knowing Meet the Buell Park phacelia (Phacelia buellvivariensis), one of Arizona’s lesser-known native treasures. This annual wildflower belongs to the fascinating phacelia genus, which includes some of our most beloved native blooms. While you might be familiar with more common phacelias like ...

Buell Park Phacelia: A Rare Arizona Wildflower Worth Knowing

Meet the Buell Park phacelia (Phacelia buellvivariensis), one of Arizona’s lesser-known native treasures. This annual wildflower belongs to the fascinating phacelia genus, which includes some of our most beloved native blooms. While you might be familiar with more common phacelias like desert bluebells, the Buell Park phacelia is a rare gem that deserves recognition among native plant enthusiasts.

What Makes This Plant Special

The Buell Park phacelia is a true Arizona native, found nowhere else in the world. As an annual forb, it completes its entire life cycle within a single growing season, emerging, flowering, setting seed, and dying back all within one year. This herbaceous plant lacks the woody stems of shrubs and trees, instead producing soft, green stems that support its foliage and flowers.

Where You’ll Find It Growing Wild

This rare phacelia calls Arizona home and appears to have a very limited natural range within the state. Its distribution seems to be closely tied to specific habitat conditions that we’re still learning about.

The Challenge of Growing Rare Natives

Here’s where things get tricky for gardeners interested in this species. The Buell Park phacelia represents one of those fascinating but frustrating cases where we know a native plant exists, but detailed information about its growing requirements, appearance, and garden performance remains limited. This isn’t uncommon with rare or newly described species.

What We Don’t Know (Yet)

Unfortunately, many details that gardeners typically want to know are still mysteries:

  • Specific growing conditions and soil preferences
  • Mature size and growth habit
  • Flower color and blooming period
  • Pollinator relationships
  • Seed availability and propagation methods
  • Conservation status

Should You Try to Grow It?

Given the limited information available, growing Buell Park phacelia presents significant challenges. Without knowing its specific requirements, even experienced native plant gardeners would be taking a shot in the dark. Additionally, if this species is indeed rare, seed or plant material may not be commercially available or ethically sourced.

Better Alternatives for Your Garden

While we wait to learn more about this intriguing species, consider these well-documented Arizona native phacelias that offer similar ecological benefits:

  • Desert Bluebells (Phacelia campanularia) – Stunning blue flowers that pollinators adore
  • Scorpionweed (Phacelia distans) – Adaptable and easy to grow from seed
  • Wild Heliotrope (Phacelia crenulata) – Fragrant purple flowers perfect for desert gardens

Supporting Plant Conservation

The existence of poorly documented species like Buell Park phacelia reminds us why supporting botanical research and plant conservation efforts matters. These plants may hold keys to understanding desert ecology, climate adaptation, or even possess unique characteristics valuable for breeding programs.

If you’re passionate about rare Arizona natives, consider supporting organizations that document and protect the state’s botanical diversity. Sometimes the best way to help a rare plant is to ensure its wild habitat remains protected while researchers work to understand its needs.

The Bottom Line

While Buell Park phacelia remains a gardening mystery for now, its story highlights the incredible diversity still waiting to be discovered and understood in our native plant communities. Stick with the well-documented phacelias for your garden today, but keep your eyes open for future research that might unlock the secrets of this rare Arizona endemic.

Who knows? Maybe someday we’ll have enough information to successfully cultivate this unique wildflower and share its beauty with garden visitors. Until then, it serves as a reminder that there’s still so much to learn about the remarkable plants growing right in our own backyards.

Buell Park 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 buell-vivariensis N.D. Atwood - Buell Park phacelia

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