North America Native Plant

Pacific Lousewort

Botanical name: Pedicularis sudetica pacifica

USDA symbol: PESUP2

Life cycle: perennial

Habit: forb

Native status: Native to Alaska  

Synonyms: Pedicularis pacifica (Hultén) Kozh. (PEPA33)  âš˜  Pedicularis sudetica Willd. var. pacifica (Hultén) S.L. Welsh (PESUP)   

Pacific Lousewort: Alaska’s Hardy Native Wildflower Looking for a truly unique addition to your northern garden? Meet Pacific lousewort (Pedicularis sudetica pacifica), a charming native wildflower that calls Alaska home. This perennial beauty might not be the easiest plant to grow, but for adventurous gardeners in the coldest climates, it ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3T4: 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. ⚘ 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 ⚘ 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. ⚘

Pacific Lousewort: Alaska’s Hardy Native Wildflower

Looking for a truly unique addition to your northern garden? Meet Pacific lousewort (Pedicularis sudetica pacifica), a charming native wildflower that calls Alaska home. This perennial beauty might not be the easiest plant to grow, but for adventurous gardeners in the coldest climates, it offers something truly special.

What Is Pacific Lousewort?

Pacific lousewort is a native Alaskan perennial that belongs to the fascinating lousewort family. Don’t let the common name fool you – these plants have nothing to do with actual lice! The name comes from an old belief that livestock grazing on these plants would get lice, though this isn’t true.

This hardy forb produces delicate, tubular flowers in shades of purple and pink, rising above deeply divided, fern-like foliage. As a perennial plant, it returns year after year once established, making it a worthwhile investment for patient gardeners.

Where Does It Grow Naturally?

Pacific lousewort is exclusively native to Alaska, where it thrives in the state’s unique climate and growing conditions. You’ll find it growing naturally throughout various regions of Alaska, from coastal areas to interior locations.

Why Consider Growing Pacific Lousewort?

There are several compelling reasons to consider this native Alaskan wildflower:

  • True Native Appeal: If you’re gardening in Alaska, this plant supports local ecosystems and provides authentic regional character
  • Pollinator Friendly: The tubular flowers attract native bees and other small pollinators
  • Unique Beauty: The delicate flowers and ferny foliage create an distinctive garden focal point
  • Cold Hardy: Thrives in extremely cold conditions where many other plants struggle
  • Wetland Adaptable: Works well in moist garden areas that challenge other plants

Important Conservation Note

Before rushing to plant Pacific lousewort, there’s something important to know. This plant has a conservation status that suggests it may have limited populations in some areas. If you decide to grow it, please only use responsibly sourced seeds or plants from reputable native plant suppliers. Never collect from wild populations.

Growing Conditions and Care

Pacific lousewort isn’t the easiest native plant to grow, but with the right conditions, it can thrive:

Climate Requirements

  • Hardiness Zones: 1-4 (perfect for Alaska’s harsh winters)
  • Temperature: Requires cool growing conditions year-round

Site Conditions

  • Moisture: Prefers consistently moist to wet soil conditions
  • Light: Grows well in partial shade to full sun
  • Soil: Adaptable to various soil types as long as moisture needs are met

Best Garden Settings

Pacific lousewort works beautifully in several specialized garden types:

  • Alpine Gardens: Perfect for rock gardens and alpine plant collections
  • Native Plant Gardens: Essential for authentic Alaskan native plant displays
  • Wetland Margins: Excellent choice for the edges of ponds, streams, or bog gardens
  • Naturalistic Plantings: Adds wild character to informal garden areas

Planting and Propagation Tips

Growing Pacific lousewort from seed requires patience and specific techniques:

  • Seeds typically need cold stratification to germinate properly
  • Start seeds in late fall or winter to mimic natural conditions
  • Keep soil consistently moist but not waterlogged
  • Be patient – germination can be slow and irregular
  • Young plants may take several years to reach flowering size

Is Pacific Lousewort Right for Your Garden?

This native wildflower is definitely not for every gardener or every garden. Consider Pacific lousewort if you:

  • Live in Alaska or similar extremely cold climates
  • Have consistently moist growing conditions
  • Enjoy growing challenging or unusual native plants
  • Want to support local pollinators with native flowers
  • Have patience for slow-growing perennials

However, you might want to skip this plant if you’re looking for quick results, live in warm climates, or don’t have reliably moist growing conditions.

Supporting Alaska’s Native Flora

By choosing to grow Pacific lousewort responsibly, you’re supporting the conservation of Alaska’s unique native plant heritage. This special wildflower represents the incredible adaptability of plants to extreme climates and adds authentic regional character to northern gardens.

Remember to source your plants or seeds responsibly, and enjoy watching this hardy native bring a touch of wild Alaska beauty to your garden space.

Pacific 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 sudetica Willd. - sudetic lousewort

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