North America Non-native Plant

Argyrolobium Rupestre

Botanical name: Argyrolobium rupestre

USDA symbol: ARRU13

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

Argyrolobium rupestre: The Mysterious Legume That’s Hard to Find If you’ve stumbled across the name Argyrolobium rupestre while researching plants for your garden, you’re not alone in finding very little information about this elusive species. This plant represents one of those botanical mysteries that even seasoned gardeners and plant enthusiasts ...

Argyrolobium rupestre: The Mysterious Legume That’s Hard to Find

If you’ve stumbled across the name Argyrolobium rupestre while researching plants for your garden, you’re not alone in finding very little information about this elusive species. This plant represents one of those botanical mysteries that even seasoned gardeners and plant enthusiasts might scratch their heads over.

What We Know (And Don’t Know)

Argyrolobium rupestre belongs to the legume family, making it a relative of beans, peas, and other nitrogen-fixing plants. However, beyond its botanical classification, concrete information about this particular species is remarkably scarce in horticultural literature and plant databases.

The genus Argyrolobium includes various shrubby legumes, but Argyrolobium rupestre appears to be either extremely rare, poorly documented, or possibly represents a taxonomic name that’s no longer widely recognized in current botanical classification systems.

Geographic Distribution

Unfortunately, the native range and geographic distribution of Argyrolobium rupestre remain unknown based on available horticultural resources.

Should You Try to Grow It?

Here’s where things get tricky. Without reliable information about this plant’s:

  • Growth requirements and preferred conditions
  • Hardiness zones
  • Size and growth habit
  • Native status in any particular region
  • Availability from reputable nurseries

It would be difficult to recommend adding Argyrolobium rupestre to your garden with confidence.

A Better Approach: Exploring Well-Documented Alternatives

If you’re drawn to leguminous plants for your garden, consider exploring better-documented native species in your area. Many regions have wonderful native legumes that offer:

  • Nitrogen fixation benefits for soil health
  • Attractive flowers that support pollinators
  • Known growing requirements and care instructions
  • Availability from local native plant nurseries

Your local extension office or native plant society can help you identify leguminous species that are native to your specific region and well-suited to your growing conditions.

The Importance of Plant Documentation

Argyrolobium rupestre serves as a reminder of how much we still don’t know about the plant kingdom. While this might seem frustrating when you’re trying to plan a garden, it also highlights the importance of:

  • Supporting botanical research and documentation efforts
  • Choosing well-documented plants for garden success
  • Working with local experts who understand regional flora

Moving Forward

If you’re specifically interested in Argyrolobium rupestre for research purposes or you believe you’ve encountered this plant in the wild, consider reaching out to botanical institutions or university botany departments. They may have more specialized knowledge or be interested in your observations.

For garden planning purposes, however, focusing on well-documented native species in your area will give you the best chance of success while supporting local ecosystems and wildlife.

Argyrolobium Rupestre

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

Argyrolobium Eckl. & Zeyh., nom. cons.

Species

Argyrolobium rupestre (E. Mey.) Walp.

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