North America Native Plant

Pennell’s Lousewort

Botanical name: Pedicularis parviflora pennellii

USDA symbol: PEPAP7

Life cycle: biennial

Habit: forb

Native status: Native to Alaska  

Synonyms: Pedicularis pennellii Hultén (PEPE9)   

Pennell’s Lousewort: A Rare Arctic Wildflower for Alaska’s Wild Spaces If you’ve stumbled across the name Pennell’s lousewort while exploring Alaska’s native flora, you’ve discovered one of the far north’s more elusive botanical treasures. This isn’t your typical garden center find, and there’s a good reason why most gardeners will ...

Rare plant alert!

Region: Conservation status by state

Status: S4T3T4: 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. ⚘ 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 ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘

Pennell’s Lousewort: A Rare Arctic Wildflower for Alaska’s Wild Spaces

If you’ve stumbled across the name Pennell’s lousewort while exploring Alaska’s native flora, you’ve discovered one of the far north’s more elusive botanical treasures. This isn’t your typical garden center find, and there’s a good reason why most gardeners will never encounter Pedicularis parviflora pennellii in cultivation.

What Exactly Is Pennell’s Lousewort?

Pennell’s lousewort is a specialized native wildflower that calls Alaska home. As a subspecies of the small-flowered lousewort, this plant represents nature’s ability to create highly adapted variants for specific environments. Don’t let the common name fool you – despite containing lousewort, this plant has nothing to do with actual lice. The peculiar name comes from an old folk belief that livestock grazing on these plants would become infested with lice.

Botanically speaking, this is a forb – essentially a non-woody flowering plant that lacks the thick, woody stems of shrubs and trees. It can live as an annual, biennial, or perennial, adapting its life cycle to the harsh conditions of its native environment.

Where Does It Grow?

Pennell’s lousewort is exclusively native to Alaska, making it one of the state’s botanical specialists. You won’t find this plant growing wild anywhere else in North America, which immediately tells us something important about its growing requirements – they’re likely very specific and challenging to replicate outside its natural range.

Why Most Gardeners Should Skip This One

Here’s the reality check: Pennell’s lousewort carries a conservation status of S4T3T4, indicating it has some level of rarity concern. While it’s not critically endangered, it’s not exactly common either. This rarity status, combined with its extremely limited native range, makes it an impractical choice for most gardeners.

Even if you could source this plant responsibly, attempting to grow it outside of Alaska would likely be an exercise in frustration. Plants that evolve in such specific geographic locations typically have very particular requirements for soil, climate, seasonal timing, and even relationships with other plants or soil organisms that are nearly impossible to replicate in a home garden setting.

The Responsible Approach

If you’re an Alaskan gardener with a passion for native plants and you’re determined to work with this species, here are the ethical considerations:

  • Only source plants or seeds from reputable native plant societies or conservation organizations
  • Never collect from wild populations
  • Ensure any cultivation attempts are part of conservation efforts rather than purely ornamental
  • Consider whether your garden can truly provide appropriate conditions for a specialized arctic plant

Better Alternatives for Native Plant Enthusiasts

Instead of struggling with this rare and specialized species, consider these approaches:

For Alaska gardeners: Focus on more readily available native Alaskan wildflowers that are better suited to cultivation and don’t carry rarity concerns. Many beautiful natives can provide similar ecological benefits without the ethical complications.

For gardeners elsewhere: Choose native plants from your own region. Every area has its own special wildflowers that will be far more successful in your local conditions and provide better benefits for local wildlife.

The Bigger Picture

Pennell’s lousewort serves as a reminder that not every beautiful native plant is destined for our gardens – and that’s perfectly okay. Some plants are meant to remain in their wild spaces, contributing to ecosystem diversity and serving specialized ecological roles that we’re only beginning to understand.

Rather than trying to bring every rare wildflower into cultivation, we can appreciate these plants by supporting habitat conservation, participating in citizen science projects, or simply enjoying them during wilderness adventures in their natural settings.

The most responsible way to grow Pennell’s lousewort might just be to ensure its wild habitats remain protected for future generations to discover and appreciate.

Pennell’s 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 parviflora Sm. ex Rees - smallflower lousewort

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