North America Native Plant

Beardtongue

Botanical name: Penstemon ×dubius

USDA symbol: PEDU5

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Beardtongue: A Native California Perennial Worth Knowing If you’re looking to add some native charm to your California garden, you might want to get acquainted with Penstemon ×dubius, commonly known as beardtongue. This perennial native has that special quality that makes plant enthusiasts take a second look – it’s authentically ...

Beardtongue: A Native California Perennial Worth Knowing

If you’re looking to add some native charm to your California garden, you might want to get acquainted with Penstemon ×dubius, commonly known as beardtongue. This perennial native has that special quality that makes plant enthusiasts take a second look – it’s authentically Californian and built to thrive in the Golden State’s unique climate.

What Makes This Beardtongue Special?

Penstemon ×dubius belongs to that wonderful group of plants we call forbs – essentially, it’s a non-woody perennial that comes back year after year without developing a thick, tree-like stem. Think of it as the reliable friend in your garden who shows up every season ready to contribute to the landscape without demanding too much attention.

As a hybrid species (that little × in the name gives it away), this beardtongue represents nature’s own plant breeding experiment. While we don’t have extensive documentation about its specific parent plants or exact characteristics, we do know it carries the hardy, drought-tolerant genes that make penstemons such garden favorites.

Where You’ll Find It Growing Wild

This particular beardtongue calls California home, making it a true native son of the Golden State. It’s evolved alongside California’s other native plants and wildlife, developing the perfect toolkit for thriving in Mediterranean climates with their distinctive wet winters and dry summers.

Why Consider Adding It to Your Garden?

Here’s where beardtongue really shines as a garden companion:

  • Water-wise gardening: As a California native, it’s naturally adapted to periods of drought once established
  • Low maintenance: Perennial growth means it returns each year without replanting
  • Authentic landscaping: Using native plants creates habitat corridors and supports local ecosystems
  • Climate appropriate: Built for California’s weather patterns, reducing the need for intensive care

Garden Design Possibilities

While specific details about this hybrid’s appearance are limited, penstemons generally bring a cottage garden charm with their tubular flowers that seem to beckon to hummingbirds and bees. They work beautifully in:

  • Native plant gardens
  • Water-wise landscapes
  • Pollinator gardens
  • Natural or informal garden designs

Growing Tips and Care

Here’s the honest truth about growing Penstemon ×dubius: specific cultivation information for this particular hybrid is quite limited. However, we can make some educated guesses based on its California native status and its membership in the penstemon family.

What we can reasonably expect:

  • Preference for well-draining soil (most California natives despise soggy feet)
  • Tolerance for drought once established
  • Likely performs best with some summer water in inland areas
  • Probably prefers full sun to partial shade

The Reality Check

Let’s be upfront here – if you’re specifically hunting for Penstemon ×dubius, you might find it challenging to locate in nurseries. Hybrid species, especially those with limited documentation, aren’t always commercially available. But don’t let that discourage you! California is blessed with numerous other penstemon species that are more readily available and equally deserving of garden space.

Consider exploring other California native penstemons like Penstemon heterophyllus (foothill beardtongue) or Penstemon spectabilis (showy beardtongue) if you can’t track down this particular hybrid.

Supporting Your Local Ecosystem

By choosing native plants like beardtongues, you’re doing more than just creating a beautiful garden – you’re providing habitat for native wildlife, supporting local pollinators, and helping maintain the ecological relationships that have developed over thousands of years. It’s gardening with purpose, and there’s something deeply satisfying about that.

While Penstemon ×dubius might be something of a botanical mystery with limited available information, its native status and perennial nature make it worth investigating if you can find it. And if you can’t? Well, California’s wealth of other native penstemons means you’ll still have plenty of wonderful options to explore.

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 ×dubius Davidson (pro sp.) [centranthifolius × grinnellii] - beardtongue

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