Native Plants

Sierra Ancha Fleabane

Erigeron anchana

USDA symbol: ERAN17

perennial forb

Lower 48 states: native

Meet Sierra Ancha fleabane (Erigeron anchana), one of Arizona’s most precious botanical treasures. This little-known wildflower might not be gracing garden centers anytime soon, but it deserves our attention for reasons that go far beyond typical gardening advice. Sierra Ancha fleabane is a perennial forb – essentially a non-woody flowering ...

Sierra Ancha Fleabane may be listed as rare in your area.
Global Conservation Status

Status: S2 | Imperiled: Extremely rare. Typically 6 to 20 occurrences or 1,000 to 3,000 remaining individuals.

Sierra Ancha Fleabane: A Rare Arizona Native Worth Protecting

Meet Sierra Ancha fleabane (Erigeron anchana), one of Arizona’s most precious botanical treasures. This little-known wildflower might not be gracing garden centers anytime soon, but it deserves our attention for reasons that go far beyond typical gardening advice.

What Makes Sierra Ancha Fleabane Special

Sierra Ancha fleabane is a perennial forb – essentially a non-woody flowering plant that comes back year after year. Like other members of the fleabane family, it likely produces cheerful daisy-like blooms, though specific details about its appearance remain elusive due to its rarity.

This native Arizona plant belongs to the larger fleabane genus, which includes many beloved wildflowers known for their delicate petals and ability to attract beneficial insects.

A True Arizona Original

Sierra Ancha fleabane is found exclusively in Arizona, making it a true endemic species. This means you won’t find it growing wild anywhere else in the world – Arizona is its one and only home.

  • Species observed
  • No observations

The Rarity Factor: Why This Matters

Here’s the important part: Sierra Ancha fleabane has a Global Conservation Status of S2, meaning it’s considered Imperiled. This classification indicates extreme rarity, with typically only 6 to 20 known occurrences and possibly fewer than 3,000 individual plants remaining in the wild.

This rarity status puts Sierra Ancha fleabane in a precarious position. Habitat loss, climate change, and human activities could easily push this species toward extinction if we’re not careful.

Should You Try to Grow It?

While we’d love to encourage everyone to grow native plants, Sierra Ancha fleabane presents a unique situation. If you’re determined to include this rare beauty in your garden, here are the essential considerations:

  • Source responsibly: Only obtain plants or seeds from reputable native plant nurseries that can guarantee ethical collection practices
  • Never collect from the wild: Taking plants or seeds from wild populations could harm already vulnerable communities
  • Consider alternatives: Other Arizona native Erigeron species might provide similar beauty with less conservation risk

Growing Conditions and Care

Specific growing requirements for Sierra Ancha fleabane aren’t well-documented, but we can make educated guesses based on its Arizona heritage:

  • Climate: Likely adapted to Arizona’s desert and semi-desert conditions
  • Water needs: Probably drought-tolerant once established, like most desert natives
  • Soil: Likely prefers well-draining soils typical of Arizona landscapes
  • Sun exposure: Probably thrives in full to partial sun

Supporting Conservation

Rather than trying to grow this rare plant, consider supporting its conservation in other ways:

  • Donate to organizations working on Arizona native plant conservation
  • Grow other native Arizona fleabanes that aren’t imperiled
  • Support habitat preservation efforts in Arizona
  • Spread awareness about rare native plants

The Bigger Picture

Sierra Ancha fleabane reminds us that not every native plant is suitable for home cultivation – sometimes the best way to appreciate a species is to protect it in its natural habitat. While we champion native gardening, we also recognize the importance of leaving our rarest plants undisturbed.

If you’re passionate about Arizona natives, there are plenty of other beautiful, non-threatened fleabane species that can bring similar charm to your garden while leaving the rarest ones safely in the wild where they belong.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Asteridae
Order: Asterales
Family: Asteraceae Bercht. & J. Presl - Aster family
Genus: Erigeron L. - fleabane

Species: Erigeron anchana G.L. Nesom - Sierra Ancha fleabane

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