North America Native Plant

Fremont’s Beardtongue

Botanical name: Penstemon fremontii var. glabrescens

USDA symbol: PEFRG

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Fremont’s Beardtongue: A Rare Colorado Native Worth Protecting If you’re a gardener who loves supporting native plants and conservation efforts, Fremont’s beardtongue (Penstemon fremontii var. glabrescens) might just capture your heart—though finding it might prove to be quite the treasure hunt! This perennial wildflower represents one of nature’s more elusive ...

Rare plant alert!

Region: Conservation status by state

Status: S3S4T2: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ 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 ⚘

Fremont’s Beardtongue: A Rare Colorado Native Worth Protecting

If you’re a gardener who loves supporting native plants and conservation efforts, Fremont’s beardtongue (Penstemon fremontii var. glabrescens) might just capture your heart—though finding it might prove to be quite the treasure hunt! This perennial wildflower represents one of nature’s more elusive beauties, making it a special addition for dedicated native plant enthusiasts.

What Makes This Plant Special

Fremont’s beardtongue is a native perennial herb that belongs to the diverse and beloved Penstemon family. As a forb, it’s a non-woody plant that dies back to the ground each winter but returns reliably each spring from its perennial root system. What sets this variety apart is its rarity—it carries a Global Conservation Status of S3S4T2, meaning it’s considered uncommon and deserving of our attention and protection.

Where You’ll Find It (Or Won’t!)

This particular variety of Fremont’s beardtongue calls Colorado home, making it a true regional specialty. Its limited distribution adds to both its charm and its conservation importance.

A Word About Rarity

Here’s where we need to have an important conversation: Fremont’s beardtongue is rare, and that rarity comes with responsibility. If you’re interested in growing this plant, it’s crucial to source it responsibly. This means:

  • Never collecting from wild populations
  • Purchasing only from reputable native plant nurseries
  • Ensuring any seeds or plants come from ethical propagation programs
  • Consider supporting conservation efforts for this species

Why Grow Fremont’s Beardtongue?

Despite its scarcity—or perhaps because of it—this native perennial offers several compelling reasons to include it in your garden:

  • Native heritage: As a true Colorado native, it’s perfectly adapted to local conditions
  • Low maintenance: Once established, native plants typically require less water and care
  • Conservation impact: Growing rare natives helps preserve genetic diversity
  • Pollinator support: Like other penstemons, it likely provides nectar for native bees and other pollinators

Growing Conditions and Care

While specific information about this variety is limited due to its rarity, we can make educated assumptions based on other Colorado penstemons and the general needs of the species:

Ideal Growing Conditions

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soil is essential; penstemons hate wet feet
  • Water: Moderate water needs; drought-tolerant once established
  • Climate: Adapted to Colorado’s challenging mountain and high-plains conditions

Planting and Care Tips

  • Plant in spring after the last frost danger has passed
  • Ensure excellent drainage to prevent root rot
  • Mulch lightly to retain moisture but allow air circulation
  • Avoid overwatering, especially in winter
  • Allow plants to go dormant naturally in fall

The Bottom Line

Fremont’s beardtongue represents both an opportunity and a responsibility. If you can source this rare native ethically, you’ll be contributing to conservation efforts while enjoying a truly special Colorado native in your garden. However, if you can’t find responsibly sourced plants, consider supporting the species in other ways—such as donating to native plant conservation programs or growing other, more common Colorado penstemons that offer similar benefits without the conservation concerns.

Remember, every rare plant in cultivation is a victory for conservation. By choosing to grow native species like Fremont’s beardtongue responsibly, you’re becoming part of a larger effort to preserve Colorado’s natural heritage for future generations.

Fremont’s 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 fremontii Torr. & A. Gray ex A. Gray - Fremont's beardtongue

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