North America Native Plant

Smallflower Lousewort

Botanical name: Pedicularis parviflora parviflora

USDA symbol: PEPAP6

Life cycle: biennial

Habit: forb

Native status: Native to Alaska  

Synonyms: Pedicularis pennellii Hultén var. insularis (Calder & Roy L. Taylor) B. Boivin (PEPEI)   

Smallflower Lousewort: Alaska’s Challenging Arctic Beauty If you’re looking for a garden plant that will test your horticultural skills while connecting you to the wild beauty of Alaska’s tundra, smallflower lousewort (Pedicularis parviflora parviflora) might just be your next adventure. This diminutive arctic native is not your typical garden center ...

Smallflower Lousewort: Alaska’s Challenging Arctic Beauty

If you’re looking for a garden plant that will test your horticultural skills while connecting you to the wild beauty of Alaska’s tundra, smallflower lousewort (Pedicularis parviflora parviflora) might just be your next adventure. This diminutive arctic native is not your typical garden center find, and frankly, that’s probably for the best—unless you’re prepared for a serious gardening challenge.

What Makes Smallflower Lousewort Special

Smallflower lousewort is a native Alaskan forb that belongs to the fascinating world of semi-parasitic plants. As a herbaceous perennial (though it can sometimes behave as an annual or biennial), this plant has evolved to thrive in some of the harshest conditions on Earth. Its small, tubular flowers—typically ranging from purple to pink—cluster together in dense spikes that rise above finely divided foliage, creating a delicate appearance that belies its tough nature.

Where You’ll Find It Growing Wild

This arctic specialist calls Alaska home, where it flourishes in the state’s tundra regions and alpine meadows. In the wild, you’ll spot smallflower lousewort growing alongside grasses and sedges in cool, moist areas where the growing season is brief but intense.

The Reality Check: Why This Plant Isn’t for Everyone

Let’s be honest—smallflower lousewort is not a beginner’s plant, and it’s certainly not for gardeners seeking instant gratification. Here’s why this plant might challenge even experienced gardeners:

  • It’s semi-parasitic, meaning it partially depends on host plants (typically grasses) for nutrients
  • Requires extremely cold conditions and won’t tolerate heat well
  • Seeds need cold stratification and can be difficult to germinate
  • Very specific growing requirements that are hard to replicate outside its native range
  • Slow to establish and may not bloom for several years

Growing Conditions and Care

If you’re determined to try growing smallflower lousewort, you’ll need to recreate arctic conditions as closely as possible. This plant thrives in USDA hardiness zones 1-4, making it suitable only for the coldest regions of North America.

Ideal growing conditions include:

  • Cool, moist, well-draining soil
  • Full sun to partial shade
  • Consistently cool temperatures, even in summer
  • Presence of host grasses or sedges
  • Protection from hot, dry winds

Planting and Propagation Tips

Growing smallflower lousewort from seed requires patience and specific techniques. Seeds need a long cold stratification period—think months, not weeks. Even then, germination can be sporadic and unpredictable. The semi-parasitic nature means you’ll also need to establish appropriate host plants first, typically native grasses that can support the lousewort’s nutritional needs.

Wildlife and Pollinator Benefits

In its native habitat, smallflower lousewort provides valuable nectar for cold-adapted pollinators, particularly bumblebees and other hardy insects that can function in cool temperatures. The plant’s flowers are specifically adapted to these robust pollinators, making it an important part of arctic and subarctic ecosystems.

Garden Design Ideas

If you’re in the right climate zone and up for the challenge, smallflower lousewort works best in:

  • Specialized alpine or arctic plant collections
  • Rock gardens designed to mimic tundra conditions
  • Native plant gardens focused on extreme cold-climate species
  • Educational gardens showcasing arctic plant adaptations

The Bottom Line

Smallflower lousewort is undeniably fascinating from both botanical and ecological perspectives, but it’s definitely not a plant for most gardens or gardeners. Its extremely specific requirements and challenging cultivation make it more of a specialist’s pursuit than a practical landscape choice. If you’re not in zones 1-4 or don’t have experience with difficult native plants, you might want to admire this arctic beauty in its natural habitat instead.

For those determined to try, approach this plant as you would a challenging hobby—with patience, realistic expectations, and a willingness to learn from failure. Sometimes the most rewarding gardening experiences come from the plants that push us furthest outside our comfort zones.

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