North America Native Plant

Guadalupe Beardtongue

Botanical name: Penstemon guadalupensis

USDA symbol: PEGU

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Penstemon guadalupensis A. Heller var. ernstii (Pennell) Cory (PEGUE)   

Guadalupe Beardtongue: A Rare Texas Treasure for Your Native Garden If you’re looking to add a touch of Texas wildflower magic to your garden while supporting conservation efforts, let me introduce you to the Guadalupe beardtongue (Penstemon guadalupensis). This charming native perennial is like finding a hidden gem in the ...

Rare plant alert!

Region: Conservation status by state

Status: S3: 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 ⚘

Guadalupe Beardtongue: A Rare Texas Treasure for Your Native Garden

If you’re looking to add a touch of Texas wildflower magic to your garden while supporting conservation efforts, let me introduce you to the Guadalupe beardtongue (Penstemon guadalupensis). This charming native perennial is like finding a hidden gem in the vast landscape of American wildflowers – beautiful, resilient, and unfortunately quite rare.

What Makes Guadalupe Beardtongue Special?

The Guadalupe beardtongue is a true Texan through and through. This lovely forb (that’s botanist speak for a non-woody flowering plant) produces delicate spikes of tubular flowers that range from soft pink to vibrant purple. Think of it as nature’s own little fireworks display, shooting up from the ground in cheerful bursts of color.

As a perennial, this hardy little plant will return year after year, growing from buds at or below ground level. It’s built to last in the challenging Texas climate, making it a smart choice for gardeners who want beauty without the fuss.

Where Does It Call Home?

This special beardtongue is found exclusively in Texas, making it a true state endemic. It’s particularly associated with the Guadalupe Mountains region and surrounding areas of West Texas, where it has adapted to the unique growing conditions of this dramatic landscape.

A Word of Caution: Rarity Matters

Here’s something important to know before you start planning your garden: Guadalupe beardtongue has a Global Conservation Status of S3, which means it’s considered vulnerable. With typically only 21 to 100 known occurrences and between 3,000 to 10,000 individuals in the wild, this plant needs our help.

If you choose to grow this beautiful native, please only purchase from reputable nurseries that sell responsibly sourced, ethically propagated plants. Never collect seeds or plants from the wild – let’s leave those precious populations undisturbed so future generations can enjoy them too.

Why Choose Guadalupe Beardtongue for Your Garden?

Despite its rarity (or perhaps because of it), there are compelling reasons to include this plant in your landscape:

  • Pollinator magnet: Those tubular flowers are practically hummingbird and butterfly magnets, while native bees find them irresistible
  • Low maintenance: Once established, it’s quite drought-tolerant – perfect for Texas gardens
  • Vertical interest: The flower spikes add lovely height and structure to garden beds
  • Conservation impact: By growing it responsibly, you’re helping preserve a vulnerable species
  • True Texas native: It’s perfectly adapted to local growing conditions

Perfect Garden Companions

Guadalupe beardtongue shines in native plant gardens, drought-tolerant landscapes, and naturalized areas. It’s an excellent choice for:

  • Wildflower gardens
  • Xeriscaping projects
  • Rock gardens
  • Native pollinator gardens
  • Low-water landscape designs

Growing Guadalupe Beardtongue Successfully

The good news is that this Texas native isn’t particularly fussy once you understand its needs. Here’s how to keep it happy:

Hardiness: Suitable for USDA zones 7-9, making it perfect for most of Texas and similar climates.

Light requirements: Prefers full sun but can tolerate some partial shade, especially during the hottest part of the day.

Soil needs: Well-draining soil is absolutely essential. This plant hates wet feet, so avoid heavy clay or areas that stay soggy.

Watering: Water regularly when first planted to help establish roots, then reduce watering significantly. Once established, it’s quite drought-tolerant and actually prefers drier conditions.

Planting and Care Tips

Plant in spring or fall when temperatures are moderate. Space plants appropriately to allow for good air circulation, and consider adding some gravel or sand to improve drainage if your soil tends to hold water.

After flowering, you can deadhead spent blooms to encourage more flowers or leave them for seed (though remember – only collect seeds from your own ethically sourced plants!). A light pruning after the growing season helps maintain a tidy appearance.

The Bottom Line

Guadalupe beardtongue is a wonderful choice for gardeners who want to grow something truly special while supporting conservation efforts. Its beautiful flowers, low-maintenance nature, and wildlife benefits make it a valuable addition to the right garden setting. Just remember – with great beauty comes great responsibility. Only source this rare native from ethical suppliers, and you’ll be contributing to both a gorgeous garden and the preservation of Texas’s natural heritage.

Guadalupe Beardtongue

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Scrophulariales

Family

Scrophulariaceae Juss. - Figwort family

Genus

Penstemon Schmidel - beardtongue

Species

Penstemon guadalupensis A. Heller - Guadalupe beardtongue

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