North America Native Plant

Arapien Blazingstar

Botanical name: Mentzelia argillosa

USDA symbol: MEAR5

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Nuttallia argillosa (J. Darl.) W.A. Weber (NUAR)   

Arapien Blazingstar: A Rare Gem for Native Plant Enthusiasts If you’re a native plant enthusiast with a passion for rare and unique species, the Arapien blazingstar might just capture your heart. This uncommon perennial wildflower, known scientifically as Mentzelia argillosa, is a true treasure of the American West that deserves ...

Rare plant alert!

Region: Conservation status by state

Status: S2: Status is uncertain but is somewhere between the following rankings: 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) ⚘

Arapien Blazingstar: A Rare Gem for Native Plant Enthusiasts

If you’re a native plant enthusiast with a passion for rare and unique species, the Arapien blazingstar might just capture your heart. This uncommon perennial wildflower, known scientifically as Mentzelia argillosa, is a true treasure of the American West that deserves special attention from dedicated gardeners.

What Makes Arapien Blazingstar Special?

The Arapien blazingstar is a perennial forb—essentially a non-woody flowering plant that returns year after year. What sets this plant apart isn’t just its cheerful yellow blooms, but its incredibly limited natural range and conservation status. This little-known native is found only in Colorado and Utah, where it has adapted to very specific growing conditions.

Unfortunately, this beautiful wildflower faces significant challenges in the wild. With a Global Conservation Status of S2 (Imperiled), the Arapien blazingstar typically exists in only 6 to 20 locations with few remaining individuals. This rarity makes it both a fascinating addition to native plant collections and a species that needs our thoughtful stewardship.

A Word About Conservation

Before we dive into growing tips, let’s address the elephant in the room: this plant’s rarity. If you’re interested in growing Arapien blazingstar, it’s absolutely crucial to source your plants or seeds responsibly. This means:

  • Never collect from wild populations
  • Purchase only from reputable native plant nurseries
  • Ensure any material comes from ethical propagation programs
  • Consider participating in seed collection efforts organized by conservation groups

Garden Appeal and Design Role

In the garden, Arapien blazingstar serves as both a conversation starter and a testament to your commitment to native plant conservation. Its modest yellow flowers appear in summer, creating delicate splashes of color that attract native bees and other small pollinators. While it may not be the showiest plant in your garden, its understated beauty and incredible rarity make it a true collector’s item.

This plant works beautifully in:

  • Native plant gardens focused on regional flora
  • Rock gardens with excellent drainage
  • Drought-tolerant landscape designs
  • Conservation-minded specialty collections

Growing Conditions and Care

Here’s where things get interesting—and a bit challenging. Arapien blazingstar has evolved to thrive in very specific conditions that mirror its native habitat in Colorado and Utah. Success with this plant requires understanding and replicating these preferences:

Sunlight: Full sun is essential. This plant has adapted to the bright, intense sunlight of its native range.

Soil: Well-draining soil is absolutely critical. In nature, this species grows in clay soils derived from Mancos Shale, so it can handle heavier soils better than many desert plants—but drainage is still key.

Water: Once established, Arapien blazingstar is quite drought tolerant. In fact, overwatering is likely to be more harmful than underwatering. Water sparingly and allow soil to dry between waterings.

Climate: Hardy in USDA zones 4-7, this plant can handle cold winters but prefers the temperature patterns of the intermountain West.

Planting and Propagation Tips

Growing Arapien blazingstar from seed is typically your best bet, as this species often doesn’t transplant well due to its specific soil preferences. Here are some tips for success:

  • Sow seeds in fall for natural stratification over winter
  • Ensure perfect drainage—consider raised beds or containers if your soil is too heavy
  • Be patient—this plant may take time to establish
  • Avoid fertilizing, as native plants often prefer lean soils
  • Mulch lightly to suppress weeds but don’t overdo it

Is Arapien Blazingstar Right for Your Garden?

This isn’t a plant for every gardener, and that’s okay! Consider Arapien blazingstar if you:

  • Are passionate about native plant conservation
  • Enjoy growing rare and unusual species
  • Have experience with challenging native plants
  • Can provide the specific growing conditions it needs
  • Are committed to responsible sourcing

If you’re new to native gardening or prefer easier-care plants, you might want to start with more common native wildflowers before attempting this rare beauty.

The Bigger Picture

By choosing to grow Arapien blazingstar responsibly, you’re not just adding an unusual plant to your garden—you’re participating in conservation efforts and helping preserve genetic diversity of this imperiled species. Every responsibly grown plant represents hope for the future of this unique wildflower.

Remember, gardening with rare native plants is both a privilege and a responsibility. With careful attention to sourcing, growing conditions, and conservation ethics, Arapien blazingstar can become a meaningful addition to your native plant collection and a living reminder of the incredible diversity of our native flora.

Arapien Blazingstar

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Violales

Family

Loasaceae Juss. - Loasa family

Genus

Mentzelia L. - blazingstar

Species

Mentzelia argillosa J. Darl. - Arapien blazingstar

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