Native Plants

Hermit Milkvetch

Astragalus eremiticus

USDA symbol: ASER4

perennial forb

Lower 48 states: native

Meet the hermit milkvetch (Astragalus eremiticus), a fascinating little perennial that lives up to its reclusive name. This rare native wildflower has carved out a specialized niche in the harsh desert landscapes of the American West, where it quietly goes about its business of surviving in some pretty tough conditions. ...

Hermit Milkvetch may be listed as rare in your area.
Global Conservation Status

Status: S1Q | Critically imperiled: Typically 5 or fewer occurrences or under 1,000 remaining individuals.

United States

Status: Endangered | Endangered. In danger of extinction throughout all or a significant portion of its range.

Hermit Milkvetch: A Rare Desert Gem Worth Protecting

Meet the hermit milkvetch (Astragalus eremiticus), a fascinating little perennial that lives up to its reclusive name. This rare native wildflower has carved out a specialized niche in the harsh desert landscapes of the American West, where it quietly goes about its business of surviving in some pretty tough conditions.

What Makes Hermit Milkvetch Special?

This charming desert dweller belongs to the legume family and produces delicate purple to pink pea-like flowers that seem almost too delicate for their rugged environment. The silvery-green compound leaves have adapted beautifully to desert life, helping the plant conserve precious moisture while still looking quite attractive.

As a native perennial, hermit milkvetch has deep roots—literally and figuratively—in the ecosystems of Arizona, Idaho, Nevada, Oregon, and Utah. It’s perfectly adapted to the boom-and-bust cycles of desert life, lying low during dry periods and putting on a show when conditions are just right.

  • Species observed
  • No observations

The Rarity Reality Check

Here’s the important part: Hermit milkvetch has a Global Conservation Status of S1Q and is listed as endangered in some areas. This means we need to treat this little plant with extra care and respect. If you’re thinking about adding it to your garden, please make sure you’re working with responsibly sourced material—never collect from wild populations!

Should You Grow Hermit Milkvetch?

Given its rarity status, hermit milkvetch isn’t your typical garden center find, and that’s probably for the best. This plant is best suited for:

  • Serious native plant enthusiasts with experience growing rare species
  • Restoration projects in appropriate habitats
  • Specialized xeric or desert-themed gardens
  • Rock gardens with excellent drainage

If you do decide to grow this rare beauty, you’ll be contributing to its conservation while enjoying a truly unique addition to your landscape.

Growing Conditions and Care

Hermit milkvetch is definitely not a plant it and forget it kind of perennial, but it’s not impossible to grow if you understand its needs:

Soil Requirements: This plant absolutely demands excellent drainage. Think sandy, gravelly soils that would make most plants throw in the towel. Clay soil is a definite no-go.

Water Needs: Once established, hermit milkvetch is incredibly drought tolerant. In fact, too much water is more likely to kill it than too little. Water sparingly during establishment, then let nature take over.

Sun Exposure: Full sun is the way to go. This plant has evolved under the intense desert sun and won’t be happy in shade.

USDA Zones: Best suited for zones 4-8, matching its native range in the intermountain region.

The Pollinator Connection

While hermit milkvetch might be rare, it plays an important role in supporting native pollinators, particularly specialized bees that have co-evolved with desert legumes. By growing this plant responsibly, you’re not just adding beauty to your garden—you’re supporting an entire web of desert life.

A Word of Caution and Encouragement

If you’re new to native gardening or desert plants, hermit milkvetch might not be the best starting point. Consider beginning with more common native species from your area before tackling rare plants that require specialized care.

However, if you’re an experienced native plant gardener looking for a meaningful conservation project, growing hermit milkvetch from ethically sourced seed or plants can be incredibly rewarding. Just remember: with great rarity comes great responsibility!

The hermit milkvetch reminds us that some of nature’s most precious gems are also its most vulnerable. Whether you choose to grow it or simply appreciate it from afar, this little desert survivor deserves our respect and protection.

Astragalus eremiticus 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. Astragalus eremiticus is also known as:

Astragalus ampullarioides | USDA symbol: ASAM14
Astragalus eremiticus Sheldon var. ampullarioides | USDA symbol: ASERA
Astragalus eremiticus Sheldon var. malheurensis | USDA symbol: ASERM
Astragalus eremiticus Sheldon var. spencianus | USDA symbol: ASERS2
Astragalus malheurensis | USDA symbol: ASMA17

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: Rosidae
Order: Fabales
Family: Fabaceae Lindl. - Pea family
Genus: Astragalus L. - milkvetch

Species: Astragalus eremiticus Sheldon - hermit milkvetch

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