North America Native Plant

Sulphur Beardtongue

Botanical name: Penstemon attenuatus var. palustris

USDA symbol: PEATP4

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Penstemon attenuatus Douglas ex Lindl. ssp. palustris (Pennell) D.D. Keck (PEATP)   

Sulphur Beardtongue: A Hidden Gem for Pacific Northwest Gardens If you’re looking to add a splash of native beauty to your Pacific Northwest garden, let me introduce you to a charming little secret: the sulphur beardtongue (Penstemon attenuatus var. palustris). This lovely perennial might not be the showiest plant in ...

Rare plant alert!

Region: Conservation status by state

Status: S4T2T3: 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) ⚘ Subspecies or variety is 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 ⚘

Sulphur Beardtongue: A Hidden Gem for Pacific Northwest Gardens

If you’re looking to add a splash of native beauty to your Pacific Northwest garden, let me introduce you to a charming little secret: the sulphur beardtongue (Penstemon attenuatus var. palustris). This lovely perennial might not be the showiest plant in the garden center, but it’s got character, resilience, and a special place in the native plant world that makes it worth getting to know.

What Makes Sulphur Beardtongue Special?

Sulphur beardtongue is a true Pacific Northwest native, naturally occurring in Idaho and Oregon. As a perennial forb (that’s garden-speak for a non-woody flowering plant), it comes back year after year, slowly establishing itself as a reliable member of your garden community. Unlike shrubs or trees, this plant lacks woody stems and instead grows from buds located at or below ground level—pretty clever survival strategy, if you ask me!

A Plant with Conservation Importance

Here’s something that makes this plant extra special: sulphur beardtongue has a conservation status that suggests it’s somewhat rare in the wild. With a ranking that indicates it may be imperiled to vulnerable in parts of its range, this is a plant that deserves our attention and care. If you’re interested in growing it, make sure you source your plants or seeds from reputable native plant nurseries that practice responsible collection methods.

Garden Appeal and Landscape Role

While we don’t have specific details about this variety’s exact appearance, beardtongues are generally beloved for their tubular flowers that seem designed by nature specifically to attract hummingbirds and native bees. The sulphur in the name hints at lovely yellow blooms that can brighten up your garden with a soft, natural color palette.

This plant works beautifully in:

  • Native plant gardens
  • Wildlife habitat areas
  • Natural landscaping projects
  • Pollinator gardens
  • Rock gardens or naturalized areas

Growing Conditions and Care

While specific growing requirements for this variety aren’t fully documented, most Penstemon species are surprisingly adaptable and relatively low-maintenance once established. They typically prefer well-draining soils and can handle some drought once their roots are established—perfect for the Pacific Northwest’s dry summers.

Since this variety is found naturally in Idaho and Oregon, it’s likely hardy in USDA zones that correspond to these regions, probably zones 4-8, though you’ll want to check with local native plant experts for specifics about your area.

Supporting Local Ecosystems

By choosing native plants like sulphur beardtongue, you’re doing more than just beautifying your space—you’re supporting local ecosystems. Native plants have co-evolved with local wildlife, providing food and habitat that non-native plants simply can’t match. While we don’t have specific wildlife benefit data for this variety, beardtongues are generally excellent for supporting native pollinators.

Planting Tips and Considerations

Given this plant’s conservation status, here are some thoughtful approaches to including it in your garden:

  • Source plants or seeds only from reputable native plant nurseries
  • Consider starting a small patch and allowing natural self-seeding
  • Plant in groups for better visual impact and pollinator appeal
  • Be patient—native plants often take time to establish but are worth the wait
  • Connect with local native plant societies for growing tips specific to your area

The Bottom Line

Sulphur beardtongue might not be the flashiest plant you can grow, but it offers something special: a genuine connection to the natural heritage of the Pacific Northwest. It’s a plant that asks for little but gives back to the ecosystem in meaningful ways. If you can source it responsibly and have the right growing conditions, this native perennial could become a treasured part of your garden’s story.

Just remember—sometimes the most rewarding plants are the ones that make you work a little harder to find them. Happy gardening!

Sulphur 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 attenuatus Douglas ex Lindl. - sulphur penstemon

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