North America Native Plant

Santa Cruz Mountains Beardtongue

Botanical name: Penstemon rattanii kleei

USDA symbol: PERAK

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Penstemon rattanii A. Gray var. kleei (Green) A. Gray (PERAK2)   

Santa Cruz Mountains Beardtongue: A Rare California Endemic Worth Knowing If you’re a native plant enthusiast with a passion for rare treasures, you might have heard whispers about the Santa Cruz Mountains beardtongue (Penstemon rattanii kleei). This little-known perennial is one of California’s botanical gems, though it’s not exactly the ...

Rare plant alert!

Region: Conservation status by state

Status: S4T2: 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) ⚘ 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 ⚘

Santa Cruz Mountains Beardtongue: A Rare California Endemic Worth Knowing

If you’re a native plant enthusiast with a passion for rare treasures, you might have heard whispers about the Santa Cruz Mountains beardtongue (Penstemon rattanii kleei). This little-known perennial is one of California’s botanical gems, though it’s not exactly the kind of plant you’ll find at your local nursery – and there’s a very good reason for that.

What Makes This Plant Special?

The Santa Cruz Mountains beardtongue is a herbaceous perennial forb, which is just a fancy way of saying it’s a non-woody flowering plant that comes back year after year. Like other members of the Penstemon family, it likely produces tubular flowers that are perfectly designed for attracting pollinators, though this particular variety remains somewhat mysterious in the gardening world.

You might also see this plant listed under its synonym, Penstemon rattanii var. kleei, in some botanical references – it’s the same plant, just with a slightly different naming convention.

Where Does It Call Home?

This endemic beauty is native to California, specifically the Santa Cruz Mountains region (hence the name!). Its limited geographic range makes it a true California original, evolved to thrive in the unique conditions of this specific mountain ecosystem.

The Rarity Reality Check

Here’s where things get serious: the Santa Cruz Mountains beardtongue has a Global Conservation Status of S4T2, indicating it’s considered rare and potentially vulnerable. This isn’t just another pretty wildflower – it’s a plant that needs our protection and respect.

What does this mean for gardeners? Simply put, this isn’t a plant you should casually add to your shopping list. Its rarity status means that:

  • Wild populations are limited and should never be disturbed
  • Seeds or plants should only come from reputable, ethical sources
  • Any cultivation attempts should be part of conservation efforts

Should You Grow It?

The short answer is: probably not, unless you’re involved in serious conservation work. The limited information available about this plant’s specific growing requirements, combined with its rarity status, makes it a challenging and potentially problematic choice for most home gardeners.

Instead of trying to grow this rare beauty, consider these alternatives that will give you similar Penstemon charm without the conservation concerns:

  • Foothill Penstemon (Penstemon heterophyllus) – gorgeous purple-blue flowers
  • Scarlet Bugler (Penstemon centranthifolius) – striking red tubular blooms
  • Palmer’s Penstemon (Penstemon palmeri) – fragrant white to pink flowers

The Bigger Picture

While you might not be growing Santa Cruz Mountains beardtongue in your backyard, knowing about rare plants like this one helps us appreciate the incredible diversity of California’s native flora. These endemic species remind us why protecting natural habitats is so crucial – once they’re gone, they’re gone forever.

If you’re passionate about rare native plants, consider supporting local conservation organizations, botanical gardens, or native plant societies that work to protect and preserve species like the Santa Cruz Mountains beardtongue. Sometimes the best way to help a plant is to leave it where it belongs and protect its natural home.

The Takeaway

The Santa Cruz Mountains beardtongue represents the wild, wonderful world of California’s endemic plants – beautiful, fascinating, and deserving of our protection. While it might not find a place in your garden, it definitely deserves a place in your heart as one of the Golden State’s botanical treasures.

Santa Cruz Mountains 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 rattanii A. Gray - Rattan'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