North America Native Plant

Yager’s Woollystar

Botanical name: Eriastrum eremicum yageri

USDA symbol: ERERY

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Yager’s Woollystar: A Rare Desert Gem Worth Protecting Meet Yager’s woollystar (Eriastrum eremicum yageri), a delicate annual wildflower that calls the American Southwest home. This charming little forb might not be the showiest plant in your garden, but it carries something far more precious – rarity and ecological significance that ...

Rare plant alert!

Region: Conservation status by state

Status: S5T2T4: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Yager’s Woollystar: A Rare Desert Gem Worth Protecting

Meet Yager’s woollystar (Eriastrum eremicum yageri), a delicate annual wildflower that calls the American Southwest home. This charming little forb might not be the showiest plant in your garden, but it carries something far more precious – rarity and ecological significance that makes it a true conservation priority.

What Makes Yager’s Woollystar Special?

Yager’s woollystar is a native annual that belongs to the phlox family, sporting the characteristic star-shaped flowers that give woollystar species their common name. As an annual forb, this plant completes its entire life cycle in one growing season, emerging from seed, blooming, setting seed, and dying back within a single year.

What sets this plant apart isn’t just its beauty – it’s its conservation status. With a Global Conservation Status of S5T2T4, Yager’s woollystar falls into a category that requires our attention and respect. This designation indicates that while the broader species may be stable in some areas, this particular variety faces conservation challenges.

Where Does It Call Home?

This desert native has a limited range, naturally occurring only in parts of Arizona and Nevada. Its restricted distribution makes it all the more special for gardeners lucky enough to live within its native territory.

Should You Grow Yager’s Woollystar?

Here’s where things get interesting – and important. If you’re passionate about native plants and live within its natural range, Yager’s woollystar could be a meaningful addition to your garden. However, there’s a big but here: due to its rarity status, you should only consider planting it if you can source seeds or plants from reputable native plant nurseries that practice responsible collection methods.

The Responsible Gardener’s Approach:

  • Never collect seeds or plants from wild populations
  • Work only with nurseries that ethically propagate rare natives
  • Consider this plant for conservation gardens or habitat restoration projects
  • Join local native plant societies to learn about conservation efforts

Growing Conditions and Care

Like most desert natives, Yager’s woollystar thrives in conditions that would challenge many garden plants. Think hot, dry, and well-draining – the complete opposite of a typical garden bed!

What It Needs:

  • Full sun exposure
  • Excellent drainage (clay soils are a no-go)
  • Minimal water once established
  • Rocky or sandy soil conditions
  • Hot, dry climate (likely USDA zones 8-10)

Garden Design Ideas

If you’re fortunate enough to grow Yager’s woollystar responsibly, consider these placement ideas:

  • Desert wildflower meadows
  • Rock gardens with native theme
  • Conservation or restoration plantings
  • Educational gardens focused on rare natives

Pollinator and Wildlife Benefits

While specific data on Yager’s woollystar is limited, related woollystar species are known to attract various pollinators including native bees and butterflies. As a native annual, it likely plays a role in supporting the intricate web of desert ecosystem relationships.

The Bottom Line

Yager’s woollystar represents something special in the native plant world – a reminder that not every plant needs to be common to be valuable. If you’re drawn to rare natives and committed to conservation-minded gardening, this little desert star could be worth seeking out through proper channels.

Remember, the best way to help rare plants like Yager’s woollystar isn’t necessarily to grow them, but to support habitat conservation and responsible native plant organizations. Sometimes the greatest gift we can give a rare plant is simply leaving it undisturbed in its natural home.

For most gardeners, exploring more common native alternatives in the Eriastrum genus might be the better choice – you’ll still get that authentic desert wildflower experience while supporting conservation efforts for the rarer species.

Yager’s Woollystar

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

Polemoniaceae Juss. - Phlox family

Genus

Eriastrum Wooton & Standl. - woollystar

Species

Eriastrum eremicum (Jeps.) H. Mason - desert woollystar

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