North America Native Plant

Hess’ Fleabane

Botanical name: Erigeron hessii

USDA symbol: ERHE9

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Hess’ Fleabane: A Critically Rare Native Wildflower Worth Protecting Meet Hess’ fleabane (Erigeron hessii), one of New Mexico’s most precious botanical treasures – and one you probably shouldn’t try to grow in your garden. Before you think that’s harsh, let me explain why this little wildflower deserves our protection rather ...

Rare plant alert!

Region: Conservation status by state

Status: S1: Status is uncertain but is somewhere between the following rankings: 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) ⚘

Hess’ Fleabane: A Critically Rare Native Wildflower Worth Protecting

Meet Hess’ fleabane (Erigeron hessii), one of New Mexico’s most precious botanical treasures – and one you probably shouldn’t try to grow in your garden. Before you think that’s harsh, let me explain why this little wildflower deserves our protection rather than our cultivation attempts.

What Makes Hess’ Fleabane Special

Hess’ fleabane is a native perennial wildflower that belongs to the sunflower family. As a forb (that’s botanist-speak for a non-woody flowering plant), it produces the characteristic daisy-like blooms that make fleabanes so charming. Like its cousins in the Erigeron family, this plant likely displays delicate white to pale purple petals radiating from a yellow center – a classic loves me, loves me not flower that would make any wildflower enthusiast swoon.

A Plant on the Edge

Here’s where things get serious: Hess’ fleabane has a Global Conservation Status of S1, which means it’s critically imperiled. To put this in perspective, there are typically fewer than 5 known occurrences of this plant in the wild, with fewer than 1,000 individual plants remaining. That makes this little fleabane rarer than many animals on the endangered species list!

Where in the World?

Erigeron hessii calls New Mexico home – and only New Mexico. This endemic species has an incredibly restricted range, making it one of the Land of Enchantment’s most exclusive residents. Its limited distribution contributes significantly to its vulnerable status.

Should You Grow Hess’ Fleabane?

The short answer is: probably not, unless you’re involved in official conservation efforts. Given its critically imperiled status, Hess’ fleabane should only be grown with responsibly sourced material obtained through legitimate conservation programs. Collecting seeds or plants from wild populations could push this species closer to extinction.

Growing Conditions (If You’re Part of Conservation Efforts)

While specific growing requirements for Hess’ fleabane aren’t well-documented, we can make educated guesses based on its New Mexico origins and its fleabane relatives:

  • Well-draining soils are likely essential
  • Full sun to partial shade conditions
  • Semi-arid climate tolerance
  • Likely hardy in USDA zones 5-8
  • Minimal water requirements once established

Wildlife and Pollinator Benefits

Though specific data is limited, Hess’ fleabane likely provides nectar and pollen for native bees, small butterflies, and beneficial insects – just like other members of the fleabane family. Every remaining plant serves as a crucial resource in its native ecosystem.

Better Alternatives for Your Garden

Instead of trying to grow this rare treasure, consider these more common native fleabanes and similar wildflowers:

  • Spreading fleabane (Erigeron divergens) – widely available and pollinator-friendly
  • Desert fleabane (Erigeron concinnus) – another New Mexico native that’s not endangered
  • White heath aster (Symphyotrichum ericoides) – similar appearance with great wildlife value
  • Native sunflowers and other Asteraceae family members

How You Can Help

The best thing you can do for Hess’ fleabane is support conservation organizations working to protect New Mexico’s rare plants. Consider donating to botanical gardens, native plant societies, or habitat conservation groups. Sometimes the most loving thing we can do for a plant is admire it from afar and let the experts handle its preservation.

Remember, every species matters – especially the rare ones hanging on by a thread. While we can’t all have Hess’ fleabane in our gardens, we can all play a role in ensuring it doesn’t disappear forever from the landscapes it calls home.

Hess’ Fleabane

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

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Erigeron L. - fleabane

Species

Erigeron hessii G.L. Nesom - Hess' fleabane

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