North America Native Plant

Skeletonweed

Botanical name: Chaetadelpha

USDA symbol: CHAET

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Skeletonweed (Chaetadelpha): A Mystery Plant of the American West If you’ve stumbled upon the name skeletonweed in your native plant research, you’ve discovered one of the more enigmatic members of the western American flora. Chaetadelpha, commonly known as skeletonweed, is a perennial forb that calls the mountainous regions of the ...

Skeletonweed (Chaetadelpha): A Mystery Plant of the American West

If you’ve stumbled upon the name skeletonweed in your native plant research, you’ve discovered one of the more enigmatic members of the western American flora. Chaetadelpha, commonly known as skeletonweed, is a perennial forb that calls the mountainous regions of the western United States home—but don’t expect to find much about it in your typical gardening guides!

What Exactly Is Skeletonweed?

Chaetadelpha belongs to that wonderful group of plants called forbs—essentially, it’s an herbaceous perennial without any significant woody stems above ground. Think of it as the plant world’s equivalent of that friend who’s fascinating but keeps a low profile. As a perennial, it comes back year after year, storing its energy in underground structures during the dormant season.

Where You’ll Find It Growing Wild

This native beauty has claimed its stake in four western states: California, Idaho, Nevada, and Oregon. It’s a true westerner, adapted to the unique conditions of this region’s diverse landscapes.

The Challenge: Limited Information

Here’s where things get interesting (and a bit frustrating for curious gardeners). Chaetadelpha is one of those plants that botanists know exists but hasn’t made its way into mainstream horticulture. We know it’s out there, doing its thing in the wild, but detailed information about its appearance, growing requirements, and garden potential remains largely undocumented.

Should You Try to Grow It?

While the mystery surrounding skeletonweed might be intriguing, the lack of cultivation information makes it a challenging choice for home gardeners. Without knowing its specific needs—from soil preferences to water requirements—successfully growing Chaetadelpha would be largely experimental.

Better Native Alternatives

If you’re drawn to the idea of growing native western forbs, consider these well-documented alternatives that share similar geographic ranges:

  • Wild bergamot (Monarda fistulosa) – excellent for pollinators
  • Blanket flower (Gaillardia aristata) – colorful and drought-tolerant
  • Penstemon species – diverse group with something for every garden
  • Lupine species – nitrogen-fixing and beautiful

The Bottom Line

Chaetadelpha represents one of nature’s many mysteries—a native plant that’s managed to keep its secrets despite our best efforts to catalogue every species. While it may not be ready for your garden border just yet, it serves as a reminder that there’s still so much to discover about our native flora.

If you’re passionate about supporting western native plants, focus on the many well-documented species that are readily available through native plant nurseries. These proven performers will give you the satisfaction of successful native gardening while supporting local ecosystems and wildlife.

Who knows? Maybe someday a dedicated botanist will unlock the secrets of growing Chaetadelpha, but until then, there are plenty of other western natives waiting to beautify your garden!

Skeletonweed

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

Chaetadelpha A. Gray ex S. Watson - skeletonweed

Species

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