North America Native Plant

Sanderson’s Burrobrush

Botanical name: Hymenoclea sandersonii

USDA symbol: HYSA2

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Ambrosia sandersonii S.L. Welsh (AMSA6)   

Sanderson’s Burrobrush: A Rare Utah Native Worth Protecting Meet Sanderson’s burrobrush (Hymenoclea sandersonii), one of Utah’s most elusive native plants. This perennial shrub might not be gracing garden centers anytime soon, but it’s certainly worth knowing about – especially if you’re passionate about rare native species and plant conservation. What ...

Rare plant alert!

Region: Conservation status by state

Status: S1Q: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ 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) ⚘

Sanderson’s Burrobrush: A Rare Utah Native Worth Protecting

Meet Sanderson’s burrobrush (Hymenoclea sandersonii), one of Utah’s most elusive native plants. This perennial shrub might not be gracing garden centers anytime soon, but it’s certainly worth knowing about – especially if you’re passionate about rare native species and plant conservation.

What Makes This Plant Special?

Sanderson’s burrobrush belongs to the sunflower family and is a true Utah endemic, meaning it exists nowhere else on Earth. This multi-stemmed woody shrub typically stays under 13-16 feet tall, making it a manageable size for those lucky enough to encounter it in the wild.

The plant is also known by its synonym Ambrosia sandersonii, though most botanists stick with the Hymenoclea sandersonii name. Either way, you’re talking about the same rare gem.

Where Does It Call Home?

This shrub has an incredibly limited range – it’s found only in Utah. Its restricted distribution is part of what makes it so special, but also so vulnerable. The plant has a Global Conservation Status of S1Q, which indicates it’s extremely rare and its status is somewhat uncertain due to limited data.

Should You Try to Grow It?

Here’s where things get tricky. While Sanderson’s burrobrush is undoubtedly fascinating, its extreme rarity means it’s not really a candidate for your average home garden. If you’re absolutely determined to grow this species, you’d need to source it extremely responsibly – and honestly, finding commercially available plants or seeds would be nearly impossible.

The rarity status means we should be extra cautious about:

  • Never collecting from wild populations
  • Only obtaining plants through legitimate conservation programs
  • Supporting habitat protection efforts instead of cultivation

Growing Conditions (What We Know)

Unfortunately, detailed cultivation information for Sanderson’s burrobrush is virtually non-existent. Given its Utah location and membership in the burrobrush family, it likely prefers:

  • Arid, desert-like conditions
  • Well-draining soils
  • Full sun exposure
  • Minimal water once established

However, without more research and cultivation experience, these are educated guesses rather than proven facts.

Better Alternatives for Your Garden

If you’re drawn to the idea of growing native Utah plants, consider these more readily available alternatives:

  • Four O’Clock burrobrush (Hymenoclea monogyra) – a more common relative
  • White burrobrush (Hymenoclea salsola) – another desert shrub option
  • Other native Utah shrubs like serviceberry or native currants

How You Can Help

Instead of trying to cultivate this rare species, consider supporting conservation efforts. Utah’s rare plants need habitat protection more than they need garden homes. You can help by:

  • Supporting local native plant societies
  • Participating in habitat restoration projects
  • Choosing common native alternatives for your own landscaping
  • Spreading awareness about rare plant conservation

Sanderson’s burrobrush may not be destined for widespread cultivation, but it serves as a reminder of the incredible diversity hiding in our native landscapes. Sometimes the best way to appreciate a plant is to protect its wild habitat and admire it from a respectful distance.

Sanderson’s Burrobrush

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

Hymenoclea Torr. & A. Gray ex A. Gray - burrobrush

Species

Hymenoclea sandersonii (S.L. Welsh) N.H. Holmgren - Sanderson's burrobrush

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