Native Plants

Broom-like Ragwort

Senecio spartioides var. multicapitatus

USDA symbol: SESPM

perennial subshrub

Lower 48 states: native

If you’re looking to add authentic southwestern charm to your native garden, you might want to get acquainted with broom-like ragwort (Senecio spartioides var. multicapitatus). This lesser-known native perennial brings a touch of wild beauty to landscapes across the American Southwest, though it’s definitely one of those plants that flies ...

Discovering Broom-Like Ragwort: A Native Southwestern Perennial

If you’re looking to add authentic southwestern charm to your native garden, you might want to get acquainted with broom-like ragwort (Senecio spartioides var. multicapitatus). This lesser-known native perennial brings a touch of wild beauty to landscapes across the American Southwest, though it’s definitely one of those plants that flies under the radar in most gardening circles.

What Exactly Is Broom-Like Ragwort?

Broom-like ragwort is a native perennial forb that belongs to the sunflower family. As a forb, it’s an herbaceous plant without woody stems – think of it as the prairie wildflower cousin in your garden rather than a shrub or tree. This particular variety, scientifically known as Senecio spartioides var. multicapitatus, is sometimes referred to by its synonym Senecio multicapitatus, so don’t be confused if you see both names floating around.

What makes this plant special is its authentically American roots. Unlike many garden favorites that hail from distant continents, broom-like ragwort has been calling the lower 48 states home for centuries, making it a genuine piece of our native botanical heritage.

Where Does Broom-Like Ragwort Call Home?

This southwestern native has quite the impressive range across the American West. You’ll find broom-like ragwort growing naturally in Arizona, Colorado, New Mexico, Texas, Utah, and Wyoming. That’s a pretty substantial chunk of the western United States, which tells us this plant is both adaptable and hardy across varying elevations and climate conditions.

  • Species observed
  • No observations

Should You Plant Broom-Like Ragwort in Your Garden?

Here’s where things get a bit tricky – and honestly refreshing in our age of information overload. Broom-like ragwort is one of those delightfully understudied native plants that hasn’t been commercialized or extensively documented in popular gardening literature. While this means we don’t have detailed cultivation guides readily available, it also means you’d be growing something truly unique and authentic to your region if you live within its native range.

The benefits of choosing this native include:

  • Supporting local ecosystems and wildlife that evolved alongside this plant
  • Requiring minimal inputs once established, as it’s adapted to local conditions
  • Adding authentic regional character to your landscape
  • Contributing to biodiversity in your garden

Growing Broom-Like Ragwort: What We Know

Since broom-like ragwort isn’t widely cultivated, specific growing information is limited. However, we can make some educated assumptions based on its native habitat and plant characteristics:

As a southwestern native perennial, this plant likely prefers well-drained soils and can handle periods of drought once established. Most plants in the Senecio genus appreciate full sun to partial shade and aren’t particularly fussy about soil fertility – often preferring lean conditions over rich, heavily amended garden soil.

If you’re interested in growing broom-like ragwort, your best bet is to:

  • Source seeds or plants from reputable native plant nurseries in your region
  • Plant in conditions similar to its natural habitat
  • Avoid overwatering, especially once established
  • Be patient – many native perennials take time to establish but reward you with longevity

The Bottom Line

Broom-like ragwort represents something special in the gardening world: an opportunity to grow a truly native plant that hasn’t been bred, selected, or modified for commercial appeal. While this means less readily available information about cultivation, it also means you’re participating in preserving and celebrating our native botanical heritage.

If you live within its native range and are passionate about native gardening, seeking out broom-like ragwort could be a rewarding adventure. Just remember to source your plants responsibly from native plant specialists, and don’t be afraid to experiment – after all, this plant has been thriving in your region long before any of us arrived with our gardening gloves and good intentions.

Senecio spartioides var. multicapitatus is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Senecio spartioides var. multicapitatus is also known as:

Senecio multicapitatus ex | USDA symbol: SEMU2

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Asteridae
Order: Asterales
Family: Asteraceae Bercht. & J. Presl - Aster family
Genus: Senecio L. - ragwort

Species: Senecio spartioides Torr. & A. Gray - broom-like ragwort

Variety: Senecio spartioides Torr. & A. Gray var. multicapitatus (Greenm. ex Rydb.) S.L. Welsh - broom-like ragwort

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