North America Native Plant

Smallflower Lousewort

Botanical name: Pedicularis parviflora

USDA symbol: PEPA4

Life cycle: biennial

Habit: forb

Native status: Native to Alaska  

Smallflower Lousewort: Alaska’s Delicate Native Wildflower If you’re gardening in Alaska or other extremely cold climates, you might want to get acquainted with smallflower lousewort (Pedicularis parviflora). This hardy little native has some unique characteristics that make it both fascinating and challenging for home gardeners. What Is Smallflower Lousewort? Smallflower ...

Smallflower Lousewort: Alaska’s Delicate Native Wildflower

If you’re gardening in Alaska or other extremely cold climates, you might want to get acquainted with smallflower lousewort (Pedicularis parviflora). This hardy little native has some unique characteristics that make it both fascinating and challenging for home gardeners.

What Is Smallflower Lousewort?

Smallflower lousewort is a native Alaskan wildflower that belongs to the figwort family. Despite its rather unfortunate common name (which has nothing to do with actual lice!), this plant is a charming addition to the right garden setting. As a forb, it’s an herbaceous plant without woody stems, and it can behave as an annual, biennial, or perennial depending on conditions.

Where Does It Grow Naturally?

This cold-loving plant is native to Alaska and parts of northern Canada. In the wild, you’ll find it thriving in the state’s unique climate and terrain, making it perfectly adapted to extreme cold and short growing seasons.

What Does It Look Like?

Smallflower lousewort produces small, tubular flowers that are typically purple or pink in color. These delicate blooms are arranged in terminal spikes at the top of the plant, creating a modest but appealing display. The plant maintains a compact growth form that fits well into naturalized settings.

Should You Plant Smallflower Lousewort?

This plant is definitely not for everyone! Here’s what you need to consider:

Reasons You Might Want to Grow It:

  • Perfect for extreme cold climates (USDA zones 1-4)
  • Supports native pollinators like bees
  • Excellent for wild gardens and naturalized landscapes
  • Ideal for wetland restoration projects
  • Low maintenance once established in the right conditions

Reasons You Might Want to Skip It:

  • Only suitable for very cold climates
  • Requires consistently moist to wet soil
  • May be semi-parasitic on other plants
  • Not readily available in most nurseries
  • Can be challenging to establish

Growing Conditions and Care

If you’re determined to grow smallflower lousewort, here’s what it needs to thrive:

Light Requirements:

This plant does well in full sun to partial shade, making it fairly flexible in terms of lighting conditions.

Soil and Water Needs:

As a facultative wetland plant, smallflower lousewort usually occurs in wetlands but can adapt to non-wetland conditions. However, it definitely prefers moist to wet soils and won’t tolerate drought conditions.

Climate Requirements:

This is where things get specific – smallflower lousewort is extremely cold hardy but won’t survive in warmer climates. It’s perfectly suited for USDA hardiness zones 1-4, which covers Alaska and the coldest parts of northern Canada.

Best Garden Settings

Smallflower lousewort works best in:

  • Native plant gardens focusing on Alaskan flora
  • Bog gardens and wetland areas
  • Naturalized landscapes and meadows
  • Restoration projects in cold, wet areas
  • Wild gardens that mimic natural ecosystems

Wildlife and Pollinator Benefits

The small tubular flowers of smallflower lousewort attract native bees and other small pollinators. While it may not be a major pollinator magnet, every native plant contributes to the local ecosystem, and this one is no exception.

The Bottom Line

Smallflower lousewort is definitely a specialist plant for specialist conditions. If you’re gardening in Alaska or similarly extreme climates and want to create authentic native plant communities, this little wildflower could be a worthwhile addition. However, if you live in more temperate areas, you’ll want to focus on native plants better suited to your local conditions.

For most gardeners, smallflower lousewort will remain an interesting plant to learn about rather than one to grow. But for those lucky enough to garden in its native range, it offers a unique opportunity to support local ecosystems while enjoying a truly regional native plant.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Alaska

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Smallflower 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