North America Non-native Plant

Astragalus Commixtus

Botanical name: Astragalus commixtus

USDA symbol: ASCO50

Native status: Not native but doesn't reproduce and persist in the wild

Astragalus commixtus: The Mystery Plant That’s Harder to Find Than a Four-Leaf Clover If you’ve stumbled upon the name Astragalus commixtus in your quest for the perfect native plant, you’re not alone in scratching your head. This particular botanical name is something of a puzzle in the plant world – ...

Astragalus commixtus: The Mystery Plant That’s Harder to Find Than a Four-Leaf Clover

If you’ve stumbled upon the name Astragalus commixtus in your quest for the perfect native plant, you’re not alone in scratching your head. This particular botanical name is something of a puzzle in the plant world – and not in a fun, satisfying jigsaw kind of way.

The Case of the Missing Milkvetch

Here’s the thing about Astragalus commixtus: it’s virtually impossible to find reliable information about this specific plant. After digging through botanical databases, native plant resources, and taxonomic references, this name appears to be either extremely obscure, historically used, or potentially not a currently recognized species.

The genus Astragalus, commonly known as milkvetch or locoweed, is enormous – we’re talking about one of the largest plant genera in the world with hundreds of species. But this particular species? It’s playing an excellent game of botanical hide-and-seek.

What This Means for Your Garden

If you’re looking to add an Astragalus species to your native garden, you’ll want to focus on well-documented, locally native species instead. Here’s why this approach makes more sense:

  • You’ll have access to reliable growing information
  • Local nurseries are more likely to carry these plants
  • You can be confident about their native status and ecological benefits
  • Care instructions and cultivation tips will be readily available

Better Alternatives in the Astragalus Family

Instead of chasing after this elusive species, consider these well-known Astragalus options that might be native to your area:

  • Canada Milkvetch (Astragalus canadensis) – A robust perennial with cream-colored flowers
  • American Groundplum (Astragalus crassicarpus) – Features inflated seed pods that look like small plums
  • Purple Milkvetch (Astragalus agrestis) – Produces lovely purple flower clusters

How to Choose the Right Astragalus for Your Garden

When selecting any milkvetch species, focus on those that are:

  • Native to your specific region
  • Well-documented with available growing information
  • Suited to your soil and climate conditions
  • Available from reputable native plant nurseries

The Takeaway

While the mystery of Astragalus commixtus remains unsolved, there are plenty of other wonderful milkvetch species that can bring beauty and ecological value to your native garden. Sometimes the best gardening advice is knowing when to pivot to better-documented alternatives.

Before purchasing any Astragalus species, check with your local native plant society or extension office to determine which species are truly native to your area and appropriate for your growing conditions. Your garden – and local wildlife – will thank you for choosing plants with a clear identity and proven track record!

Astragalus Commixtus

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Astragalus L. - milkvetch

Species

Astragalus commixtus Bunge

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