North America Native Plant

Charleston Lousewort

Botanical name: Pedicularis semibarbata var. charlestonensis

USDA symbol: PESEC

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Pedicularis semibarbata A. Gray ssp. charlestonensis (Pennell & Clokey) Clokey (PESEC2)   

Charleston Lousewort: A Rare Nevada Native Worth Protecting If you’ve never heard of Charleston lousewort, you’re not alone. This rare perennial wildflower is one of Nevada’s hidden botanical treasures, quietly growing in specific mountain habitats while remaining largely unknown to most gardeners and nature enthusiasts. What Makes Charleston Lousewort Special? ...

Rare plant alert!

Region: Conservation status by state

Status: S4T3Q: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ 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 ⚘

Charleston Lousewort: A Rare Nevada Native Worth Protecting

If you’ve never heard of Charleston lousewort, you’re not alone. This rare perennial wildflower is one of Nevada’s hidden botanical treasures, quietly growing in specific mountain habitats while remaining largely unknown to most gardeners and nature enthusiasts.

What Makes Charleston Lousewort Special?

Charleston lousewort (Pedicularis semibarbata var. charlestonensis) is a native perennial forb that belongs to the fascinating lousewort family. Don’t let the name fool you – despite its rather unfortunate common name, this plant has nothing to do with lice! The name lousewort comes from an old folk belief that livestock grazing on these plants would become infested with lice, though there’s no scientific basis for this claim.

As a forb, Charleston lousewort is an herbaceous plant without woody stems, meaning it dies back to ground level each winter and returns from its roots the following growing season. This growth pattern makes it well-adapted to harsh mountain conditions where it naturally occurs.

Where Does It Call Home?

This rare variety is endemic to Nevada, making it a true Silver State specialty. Its limited geographic distribution contributes to its rarity and makes it particularly special for Nevada native plant enthusiasts.

The Rarity Factor: Why This Matters

Here’s where things get serious: Charleston lousewort has a Global Conservation Status of S4T3Q, indicating it’s considered rare and potentially vulnerable. This means that while it may be relatively secure in some areas, its limited range and small population sizes make it worth monitoring and protecting.

If you’re thinking about adding this plant to your garden, proceed with extreme caution and responsibility. Any plant material should only be obtained from reputable native plant nurseries that can guarantee their stock comes from ethically sourced, nursery-propagated plants – never from wild collection.

Should You Grow Charleston Lousewort?

This is where we hit a roadblock. Due to its rarity, very little is known about Charleston lousewort’s specific growing requirements, care needs, or garden performance. Most louseworts are mountain plants that prefer specific soil conditions and climate requirements that can be challenging to replicate in typical garden settings.

For most gardeners, especially those outside of Nevada’s mountain regions, Charleston lousewort probably isn’t a practical choice. Instead, consider these alternatives:

  • Other native Nevada wildflowers that are more readily available and better understood
  • More common Pedicularis species if you’re specifically interested in louseworts
  • Native perennial forbs that provide similar ecological benefits but are easier to grow

The Bottom Line

Charleston lousewort represents the incredible diversity of Nevada’s native flora, but it’s best appreciated and protected in its natural habitat. If you’re passionate about rare native plants and have experience with challenging mountain species, you might consider supporting conservation efforts for this unique variety rather than attempting to cultivate it.

For most gardeners, the best way to honor Charleston lousewort is to choose other native Nevada plants that are better suited to cultivation while supporting the conservation organizations working to protect rare species like this one in the wild.

Remember: the rarest plants often stay rare for good reasons, and sometimes the most loving thing we can do is admire them from a respectful distance while working to protect their natural homes.

Charleston Lousewort

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

Pedicularis L. - lousewort

Species

Pedicularis semibarbata A. Gray - pinewoods lousewort

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