North America Native Plant

Carrizo Creek Ragwort

Botanical name: Packera spellenbergii

USDA symbol: PASP18

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Senecio cliffordii N.D. Atwood & S.L. Welsh (SECL5)  ⚘  Senecio spellenbergii T.M. Barkley (SESP7)   

Carrizo Creek Ragwort: A Rare Native Treasure Worth Protecting If you’re passionate about native plants and conservation gardening, you might be intrigued by Carrizo Creek ragwort (Packera spellenbergii). But before you start planning where to plant this New Mexico native, there’s something important you need to know: this little wildflower ...

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) ⚘

Carrizo Creek Ragwort: A Rare Native Treasure Worth Protecting

If you’re passionate about native plants and conservation gardening, you might be intrigued by Carrizo Creek ragwort (Packera spellenbergii). But before you start planning where to plant this New Mexico native, there’s something important you need to know: this little wildflower is fighting for survival.

What Makes This Plant Special

Carrizo Creek ragwort is a perennial forb that belongs to the sunflower family. Like other ragworts, it produces cheerful yellow daisy-like flowers that bloom from spring into early summer. The plant forms an attractive basal rosette of leaves and sends up flowering stems when conditions are right.

You might also see this plant listed under its former scientific names, Senecio cliffordii or Senecio spellenbergii, but botanists have since moved it to the Packera genus where it belongs today.

Where Does It Grow?

This ragwort is endemic to New Mexico, meaning it naturally occurs nowhere else on Earth. Its common name gives away its origin story – it was discovered in the Carrizo Creek area of Lincoln County. The plant’s entire natural range is incredibly limited, which brings us to an important conservation concern.

Why This Plant Needs Our Help

Here’s where things get serious: Carrizo Creek ragwort has a Global Conservation Status of S2, which means it’s imperiled. With only 6 to 20 known occurrences and somewhere between 1,000 to 3,000 individual plants remaining in the wild, this species is teetering on the edge of extinction.

This rarity status means that if you’re considering growing this plant, you have a responsibility to source it ethically. Never collect seeds or plants from wild populations, and only purchase from reputable native plant nurseries that propagate from legally and sustainably obtained stock.

Growing Conditions and Care

As a New Mexico native adapted to arid conditions, Carrizo Creek ragwort likely thrives in:

  • Well-draining soils
  • Full sun to partial shade
  • Low to moderate water once established
  • USDA hardiness zones 4-8

The plant’s wetland status varies by region, but it generally prefers upland conditions and rarely occurs in wetlands. This makes it well-suited for xeriscaping and water-wise native gardens.

Benefits for Wildlife and Pollinators

While specific wildlife benefits for this rare species aren’t well-documented, ragworts in general are valuable pollinator plants. The bright yellow flowers likely attract native bees, butterflies, and other beneficial insects during their blooming period.

Should You Plant It?

If you’re committed to conservation and can source Carrizo Creek ragwort responsibly, growing it can be part of important ex-situ conservation efforts. However, given its rarity and specialized needs, this isn’t a plant for casual gardeners.

For most native plant enthusiasts, consider supporting this species through:

  • Donations to conservation organizations working in New Mexico
  • Planting other native Packera species that are more common
  • Creating habitat for native pollinators with abundant native alternatives
  • Supporting research and conservation efforts for rare plants

The Bottom Line

Carrizo Creek ragwort represents both the beauty and fragility of our native plant heritage. While it might not be the right choice for every garden, raising awareness about rare plants like this one helps us appreciate the incredible diversity we’re working to protect. If you do choose to grow it, you become part of a conservation effort that could help ensure future generations get to enjoy this unique piece of New Mexico’s natural legacy.

Carrizo Creek Ragwort

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

Packera Á. Löve & D. Löve - ragwort

Species

Packera spellenbergii (T.M. Barkley) C. Jeffrey - Carrizo Creek ragwort

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