North America Native Plant

Coiled Lousewort

Botanical name: Pedicularis contorta var. ctenophora

USDA symbol: PECOC

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Pedicularis ctenophora Rydb. (PECT)  âš˜  Pedicularis lunata Rydb. (PELU4)   

Coiled Lousewort: A Rare Rocky Mountain Native Worth Knowing Meet coiled lousewort (Pedicularis contorta var. ctenophora), a fascinating native perennial that calls the Rocky Mountain region home. While this particular variety might not be the easiest plant to find at your local nursery, it represents an important piece of our ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3: Status is uncertain but is somewhere between the following rankings: 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. ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Coiled Lousewort: A Rare Rocky Mountain Native Worth Knowing

Meet coiled lousewort (Pedicularis contorta var. ctenophora), a fascinating native perennial that calls the Rocky Mountain region home. While this particular variety might not be the easiest plant to find at your local nursery, it represents an important piece of our native plant heritage and offers unique appeal for dedicated native plant enthusiasts.

What Makes Coiled Lousewort Special?

Coiled lousewort belongs to the snapdragon family and is classified as a forb – essentially a non-woody perennial herb. This plant has an interesting taxonomic history, previously known by the scientific names Pedicularis ctenophora and Pedicularis lunata before being reclassified as a variety of Pedicularis contorta.

What sets this plant apart is its rarity. With a Global Conservation Status of S5T3, coiled lousewort is considered uncommon to rare across its range. This makes it a special find for native plant collectors, but also means we need to be thoughtful about how we approach growing it.

Where Does Coiled Lousewort Grow?

This Rocky Mountain native has a relatively limited natural range, growing wild in Idaho, Montana, and Wyoming. Its distribution reflects its adaptation to the unique conditions found in this mountainous region of the American West.

Should You Grow Coiled Lousewort?

Here’s where things get a bit complicated. While coiled lousewort is undoubtedly a worthy native plant, its rarity status means you’ll want to approach it thoughtfully:

  • For conservation-minded gardeners: This plant could be a valuable addition to a native plant collection, but only if you can source it responsibly
  • For typical home gardeners: The limited availability and specific growing requirements might make other native alternatives more practical choices
  • For restoration projects: This could be an important species for habitat restoration in its native range

Growing Coiled Lousewort: What We Know

Unfortunately, detailed cultivation information for this specific variety is quite limited. As a Rocky Mountain native perennial forb, it likely prefers:

  • Cool, mountainous growing conditions similar to its native habitat
  • Well-draining soil, as most mountain natives dislike soggy conditions
  • Possibly some protection from intense summer heat in lower elevation gardens

The Responsible Approach

Given its rarity status, if you’re interested in growing coiled lousewort, please:

  • Only purchase from reputable native plant nurseries that grow from ethically collected seed
  • Never collect plants or seeds from wild populations
  • Consider participating in seed exchanges or conservation programs
  • Focus on creating habitat that could support reintroduction efforts

Native Alternatives to Consider

If coiled lousewort proves too challenging to source or grow, consider these other Rocky Mountain natives that might be more readily available:

  • Other Pedicularis species native to your specific area
  • Native penstemons (Penstemon species)
  • Rocky Mountain wildflowers suited to your elevation and conditions

The Bottom Line

Coiled lousewort represents the fascinating diversity of our native flora, even if it’s not the most garden-friendly option out there. For serious native plant enthusiasts willing to do their homework and source responsibly, it could be a rewarding addition to a specialized collection. For most gardeners, though, focusing on more common native alternatives might be a better way to support local ecosystems while building a thriving native garden.

Remember, every native plant has value in our ecosystems, whether it’s common or rare. Sometimes the best way to appreciate a rare species like coiled lousewort is simply to learn about it and support the conservation of its natural habitat.

Coiled 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 contorta Benth. - coiled lousewort

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