North America Native Plant

Allegheny Mountain Goldenbanner

Botanical name: Thermopsis mollis

USDA symbol: THMO2

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Thermopsis hugeri (Small) Small (THHU3)   

Allegheny Mountain Goldenbanner: A Rare Native Gem Worth Growing If you’re looking to add a splash of sunshine to your native garden while supporting local ecosystems, let me introduce you to a real treasure: Allegheny Mountain goldenbanner (Thermopsis mollis). This cheerful perennial might not be as well-known as some other ...

Rare plant alert!

Region: Alabama

Status: S3S4: Status is uncertain but is somewhere between the following rankings: Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘ Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘

Region: Alabama

Allegheny Mountain Goldenbanner: A Rare Native Gem Worth Growing

If you’re looking to add a splash of sunshine to your native garden while supporting local ecosystems, let me introduce you to a real treasure: Allegheny Mountain goldenbanner (Thermopsis mollis). This cheerful perennial might not be as well-known as some other native wildflowers, but it’s definitely worth getting acquainted with – especially if you live in the southeastern United States.

What Is Allegheny Mountain Goldenbanner?

Allegheny Mountain goldenbanner is a native perennial forb that belongs to the pea family. You might occasionally see it listed under its synonym, Thermopsis hugeri, but don’t let that confuse you – we’re talking about the same delightful plant. This herbaceous beauty lacks woody tissue above ground and dies back each winter, only to emerge again with renewed vigor come spring.

Where Does It Call Home?

This native gem has made itself at home across eight southeastern states: Alabama, Georgia, Kentucky, New Jersey, North Carolina, South Carolina, Tennessee, and Virginia. It’s particularly fond of the Appalachian regions, where it thrives in the mountain and foothill environments that give it its common name.

Why You Should (Carefully) Consider Growing It

Here’s where things get interesting – and important. Allegheny Mountain goldenbanner isn’t just another pretty face in the native plant world. It has a global conservation status of S3S4, and in Alabama, it’s considered quite rare with an S1 status. This means if you’re thinking about adding this beauty to your garden, you absolutely must source it responsibly from reputable native plant nurseries that propagate their own stock rather than wild-harvesting.

The Visual Appeal

When Allegheny Mountain goldenbanner decides to put on a show in late spring to early summer, it’s truly spectacular. Bright golden-yellow flowers arranged in upright, showy racemes create vertical interest that can light up any garden space. The pea-like blooms are not only beautiful but also have that classic legume family charm that many gardeners find irresistible.

A Pollinator’s Best Friend

Your local pollinators will thank you for choosing this native beauty. Allegheny Mountain goldenbanner attracts a variety of beneficial insects, including:

  • Native bees
  • Butterflies
  • Other pollinating insects

By planting native species like this one, you’re not just creating a pretty garden – you’re supporting the intricate web of relationships that keep our local ecosystems healthy and thriving.

Perfect Garden Settings

This versatile native works beautifully in several garden styles:

  • Native wildflower gardens
  • Woodland gardens
  • Naturalized landscapes
  • Pollinator gardens
  • Low-maintenance native plant collections

Growing Conditions and Care

One of the best things about Allegheny Mountain goldenbanner is that it’s relatively low-maintenance once established. Here’s what it prefers:

Light: Partial shade to full sun – it’s quite adaptable to different lighting conditions

Soil: Well-drained soils are essential. It’s not particularly picky about soil type but doesn’t appreciate waterlogged conditions

Water: Drought tolerant once established, making it perfect for low-maintenance gardens

Hardiness: Thrives in USDA zones 5-8

Planting and Care Tips

Getting your Allegheny Mountain goldenbanner off to a good start is straightforward:

  • Fall planting often works best, giving the plant time to establish before the growing season
  • This perennial may spread by rhizomes over time, creating natural drifts
  • Very low maintenance once established – just let it do its thing!
  • Cut back spent flower stems if you prefer a tidier look, though leaving them can provide winter interest

The Bottom Line

Allegheny Mountain goldenbanner is a wonderful choice for gardeners who want to support native ecosystems while enjoying beautiful blooms. Just remember the golden rule: source responsibly! Given its rarity status, especially in Alabama, it’s crucial to purchase from reputable nurseries that grow their own plants rather than wild-harvest them.

If you can find responsibly sourced plants and you live within its native range, this cheerful perennial will reward you with years of bright blooms, happy pollinators, and the satisfaction of knowing you’re helping preserve a piece of our native botanical heritage.

Allegheny Mountain Goldenbanner

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

Thermopsis R. Br. - goldenbanner

Species

Thermopsis mollis (Michx.) M.A. Curtis ex A. Gray - Allegheny Mountain goldenbanner

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