Native Plants

Intermountain Indian Breadroot

Pediomelum megalanthum var. retrorsum

USDA symbol: PEMER

perennial forb

Lower 48 states: native

If you’re passionate about growing native plants and love discovering hidden botanical treasures, the Intermountain Indian breadroot (Pediomelum megalanthum var. retrorsum) might just capture your attention. This perennial forb represents one of nature’s more specialized offerings in the American Southwest, bringing both historical significance and ecological value to the right ...

Intermountain Indian Breadroot may be listed as rare in your area.
Global Conservation Status

Status: S4?T3T4 | Subspecies or varieties apparently secure: Uncommon but not rare, and usually widespread. Possible cause for longterm concern. Typically more than 100 occurrences or more than 10,000 individuals.

Intermountain Indian Breadroot: A Rare Native Gem for Southwest Gardens

If you’re passionate about growing native plants and love discovering hidden botanical treasures, the Intermountain Indian breadroot (Pediomelum megalanthum var. retrorsum) might just capture your attention. This perennial forb represents one of nature’s more specialized offerings in the American Southwest, bringing both historical significance and ecological value to the right garden setting.

What Makes This Plant Special?

The Intermountain Indian breadroot belongs to the legume family and has earned its common name from its traditional use by Indigenous peoples, who valued similar species for their nutritious underground roots. As a perennial forb, this plant lacks the woody stems of shrubs and trees, instead producing herbaceous growth that returns year after year from its root system.

What sets this variety apart is its scientific designation as Pediomelum megalanthum var. retrorsum, distinguishing it from other members of its species group. You might also encounter it under its synonym Psoralea mephitica var. retrorsa in older botanical references.

Where Does It Grow Naturally?

This native beauty calls the intermountain region of the American Southwest home, naturally occurring across Arizona, Nevada, and Utah. Its distribution reflects its adaptation to the unique growing conditions found in these states’ diverse landscapes, from desert valleys to higher elevation plateaus.

  • Species observed
  • No observations

A Word About Conservation

Here’s where responsible gardening becomes crucial: Intermountain Indian breadroot carries a conservation status that deserves our attention. With a ranking that suggests it may be uncommon to rare in parts of its range, this plant represents exactly the kind of species that thoughtful native plant gardeners can help preserve through cultivation.

If you’re interested in growing this species, please ensure you source your plants or seeds from reputable native plant nurseries that propagate their stock responsibly rather than collecting from wild populations.

Why Consider Growing It?

For the dedicated native plant enthusiast, the Intermountain Indian breadroot offers several compelling reasons to find space in your garden:

  • True native credentials supporting local ecosystems
  • Perennial nature means long-term garden presence
  • Historical and cultural significance
  • Potential to support regional wildlife
  • Opportunity to participate in plant conservation

Growing Considerations

As with many native plants from the intermountain region, this species likely prefers well-draining soils and can tolerate the challenging conditions that characterize its natural habitat. Given its native range across Arizona, Nevada, and Utah, gardeners in similar climatic zones would have the best success.

Since specific cultivation information for this variety remains limited in common gardening resources, your best approach would be to:

  • Consult with local native plant societies in the Southwest
  • Connect with botanical gardens or universities in its native range
  • Observe the growing conditions where it naturally occurs
  • Start with small-scale trials in your garden

The Bottom Line

The Intermountain Indian breadroot represents the kind of specialized native plant that appeals to serious collectors and conservation-minded gardeners. While it may not offer the showy blooms of more common native plants, its ecological authenticity and conservation value make it worthy of consideration for the right garden setting.

Remember, successful native gardening often means matching plants to appropriate conditions rather than trying to force them into unsuitable environments. If you garden within or near this plant’s natural range and can source it responsibly, you’ll be participating in both botanical conservation and authentic regional landscaping.

Just keep in mind that with great plants comes great responsibility – especially when dealing with species that aren’t common in the wild!

Pediomelum megalanthum var. retrorsum 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. Pediomelum megalanthum var. retrorsum is also known as:

Psoralea mephitica Watson var. retrorsa Kearney & | USDA symbol: PSMER2

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: Pediomelum Rydb. - Indian breadroot

Species: Pediomelum megalanthum (Wooton & Standl.) Rydb. - Intermountain Indian breadroot

Variety: Pediomelum megalanthum (Wooton & Standl.) Rydb. var. retrorsum (Rydb.) J. Grimes - Intermountain Indian breadroot

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