North America Native Plant

Arid Tansyaster

Botanical name: Machaeranthera arida

USDA symbol: MAAR5

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Arida arizonica (R.C. Jacks. & R.R. Johnson) D.R. Morgan & R.L. Hartm. (ARAR)  âš˜  Machaeranthera ammophila Reveal (MAAM10)  âš˜  Machaeranthera arizonica R.C. Jacks. & R.R. Johnson (MAAR6)  âš˜  Machaeranthera coulteri (A. Gray) B.L. Turner & Horne var. arida (B.L. Turner & Horne) B.L. Turner (MACOA)  âš˜  Psilactis coulteri auct. non A. Gray. p.p. (PSCO7)   

Arid Tansyaster: A Tiny Desert Gem for Water-Wise Gardens Meet the arid tansyaster (Machaeranthera arida), a delightful little wildflower that proves good things really do come in small packages! This charming annual might not win any height contests, but what it lacks in stature, it more than makes up for ...

Rare plant alert!

Region: Conservation status by state

Status: S3S4: Status is uncertain but is somewhere between the following rankings: Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

Arid Tansyaster: A Tiny Desert Gem for Water-Wise Gardens

Meet the arid tansyaster (Machaeranthera arida), a delightful little wildflower that proves good things really do come in small packages! This charming annual might not win any height contests, but what it lacks in stature, it more than makes up for in desert toughness and understated beauty.

What is Arid Tansyaster?

Arid tansyaster is a native annual forb that belongs to the sunflower family. As a true desert dweller, this herbaceous plant has evolved to thrive in the harsh conditions of the American Southwest. Don’t let its delicate appearance fool you – this little survivor knows how to make the most of minimal resources while providing maximum charm.

Where Does It Call Home?

This southwestern native has made itself at home across Arizona, California, and Nevada. In the wild, you’ll find it dotting desert floors, rocky slopes, and sandy washes where few other plants dare to venture. Its natural range tells us everything we need to know about its preferences: hot, dry, and unforgiving conditions are right up its alley.

Why Plant Arid Tansyaster?

Here are several compelling reasons to consider adding this native beauty to your landscape:

  • Water-wise wonder: Once established, it thrives on minimal irrigation, making it perfect for drought-tolerant gardens
  • Native plant bonus: Supporting local ecosystems by choosing plants that naturally belong in your region
  • Pollinator magnet: Those small, daisy-like flowers attract native bees, butterflies, and other beneficial insects
  • Low maintenance: As an annual, it completes its life cycle without requiring years of commitment
  • Authentic desert character: Adds genuine southwestern flair to xerophytic landscapes

Garden Design Ideas

Arid tansyaster shines brightest when used thoughtfully in appropriate settings. Consider incorporating it into:

  • Desert and xeriscape gardens
  • Rock gardens and gravel beds
  • Native plant demonstrations
  • Wildflower meadow mixes
  • Pollinator gardens in arid regions

Growing Conditions and Care

Success with arid tansyaster comes from mimicking its natural desert habitat:

Sunlight: Full sun is essential – this plant has adapted to intense desert sunshine and won’t perform well in shade.

Soil: Well-draining sandy or rocky soil is crucial. Heavy clay or constantly moist conditions will likely lead to failure. If your soil retains too much moisture, consider raised beds or adding plenty of coarse sand and gravel.

Water: Less is definitely more. Once established, occasional deep watering during extended dry periods is usually sufficient. Overwatering is probably the quickest way to kill this drought-adapted native.

Climate: Best suited for USDA hardiness zones 8-10, matching its native range in the hot, arid Southwest.

Planting and Propagation Tips

As an annual, arid tansyaster grows from seed each year. For best results:

  • Direct seed in fall or early spring when temperatures are moderate
  • Scatter seeds over prepared, well-draining soil
  • Lightly rake to ensure good seed-to-soil contact
  • Provide minimal supplemental water until germination occurs
  • Allow plants to self-seed for future generations

Special Considerations

Arid tansyaster has a Global Conservation Status of S3S4, indicating it may face some population pressures in its native range. While not critically endangered, choosing to grow this native species helps support biodiversity and conservation efforts.

The plant typically grows as a facultative upland species, meaning it usually prefers non-wetland conditions but can occasionally tolerate some moisture. This flexibility makes it suitable for slightly varied garden conditions within its preferred dry range.

Is Arid Tansyaster Right for Your Garden?

This charming desert native is perfect for gardeners who:

  • Live in the southwestern United States
  • Want to reduce water usage in their landscapes
  • Appreciate subtle, natural beauty over flashy blooms
  • Enjoy supporting native pollinators and wildlife
  • Prefer low-maintenance plants that don’t require constant attention

However, it might not be the best choice if you’re looking for a plant that provides long-lasting color, significant height, or thrives in humid, water-rich environments.

Arid tansyaster may be small and unassuming, but it represents the resilient spirit of desert plants everywhere. By choosing this native beauty, you’re not just adding a plant to your garden – you’re participating in the preservation of southwestern botanical heritage while creating habitat for local wildlife. In our increasingly water-conscious world, that’s a pretty big impact from such a little flower!

Arid Tansyaster

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

Machaeranthera Nees - tansyaster

Species

Machaeranthera arida B.L. Turner & Horne - arid tansyaster

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