North America Non-native Plant

Astragalus Magdalenae Var. Niveus

Botanical name: Astragalus magdalenae var. niveus

USDA symbol: ASMAN2

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

Synonyms: Astragalus niveus Rydb. (ASNI8)   

The Mysterious Astragalus magdalenae var. niveus: A Botanical Enigma Sometimes in the world of native plants, we encounter species that are like botanical unicorns—talked about in hushed tones among plant enthusiasts but rarely seen in gardens or even in the wild. Astragalus magdalenae var. niveus is one such plant, a ...

The Mysterious Astragalus magdalenae var. niveus: A Botanical Enigma

Sometimes in the world of native plants, we encounter species that are like botanical unicorns—talked about in hushed tones among plant enthusiasts but rarely seen in gardens or even in the wild. Astragalus magdalenae var. niveus is one such plant, a variety so elusive that even finding basic information about it feels like a treasure hunt.

What We Know (And Don’t Know)

Here’s where things get interesting—and by interesting, I mean frustratingly mysterious. This particular variety of milkvetch has very little documented information available. What we do know is that it belongs to the Astragalus genus, commonly known as milkvetches, and has the synonym Astragalus niveus Rydb. Beyond that, we’re venturing into uncharted territory.

The lack of readily available information about Astragalus magdalenae var. niveus suggests this could be:

  • An extremely rare plant with very limited natural distribution
  • A variety that exists primarily in specialized botanical collections
  • A taxonomically uncertain plant that may need further scientific study

The Challenge for Gardeners

If you’re hoping to add this plant to your native garden, you’re going to face some significant challenges. Without known information about its native range, growing conditions, or even basic characteristics like size and appearance, successfully cultivating Astragalus magdalenae var. niveus would be like trying to bake a cake without a recipe.

The mystery surrounding this plant means we don’t know:

  • Where it naturally occurs
  • What growing conditions it prefers
  • How large it gets or what it looks like
  • What pollinators or wildlife it might support
  • Whether it’s rare, endangered, or facing conservation concerns

Should You Try to Grow It?

Given the complete lack of cultivation information and uncertain availability, I’d recommend steering clear of trying to grow this particular variety unless you’re a serious botanical researcher or have access to specialized plant collections. Even then, without knowing its specific needs, success would be highly uncertain.

Instead, consider exploring other well-documented Astragalus species that are more suitable for home gardens. Many milkvetches are beautiful, drought-tolerant plants that support pollinators and add unique textures to native plant gardens—and you’ll actually be able to find growing information for them!

The Bottom Line

Astragalus magdalenae var. niveus remains one of botany’s mysteries. While the intrigue of growing such an obscure plant might be tempting, the practical reality is that without basic information about its needs, origins, or characteristics, it’s not a realistic choice for most gardeners.

Sometimes the most responsible thing we can do as native plant enthusiasts is to acknowledge when we simply don’t know enough about a plant to grow it successfully. In this case, that’s exactly where we find ourselves with this enigmatic variety.

If you’re drawn to unusual native plants, consider exploring other rare-but-documented species in your region instead. Your garden—and your sanity—will thank you for it!

Astragalus Magdalenae Var. Niveus

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 magdalenae Greene - satiny milkvetch

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