North America Native Plant

Oregon Woollyheads

Botanical name: Psilocarphus oregonus

USDA symbol: PSOR

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Oregon Woollyheads: A Tiny Wetland Wonder for Specialized Gardens If you’re looking for a showstopping centerpiece for your garden, Oregon woollyheads probably isn’t your plant. But if you’re passionate about wetland restoration, native plant gardening, or creating habitat for specialized ecosystems, this unassuming little annual might just be the perfect ...

Oregon Woollyheads: A Tiny Wetland Wonder for Specialized Gardens

If you’re looking for a showstopping centerpiece for your garden, Oregon woollyheads probably isn’t your plant. But if you’re passionate about wetland restoration, native plant gardening, or creating habitat for specialized ecosystems, this unassuming little annual might just be the perfect addition to your wet garden spaces.

What Exactly Are Oregon Woollyheads?

Oregon woollyheads (Psilocarphus oregonus) are small annual forbs native to the western United States. As a forb, this plant lacks woody tissue and grows fresh from seed each year. Don’t expect a towering presence – these are modest plants that play an important ecological role rather than stealing the visual spotlight.

The name woollyheads gives you a pretty good idea of what to expect: small, white, fuzzy flower heads that have a distinctly woolly appearance. While they may not win any beauty contests, they have their own understated charm.

Where Do They Come From?

Oregon woollyheads are native to five western states: California, Idaho, Nevada, Oregon, and Washington. They’re truly western natives, adapted to the unique conditions of the Pacific Northwest and adjacent regions.

The Wetland Specialist

Here’s where things get interesting – and challenging. Oregon woollyheads are classified as obligate wetland plants in both the Arid West and Western Mountains, Valleys, and Coast regions. This means they almost always occur in wetlands and require consistently moist to wet conditions to thrive.

This wetland requirement is both their greatest strength and their biggest limitation for home gardeners. If you have naturally wet areas, seasonal flooding, or are creating a rain garden or constructed wetland, Oregon woollyheads could be an excellent native choice.

Should You Grow Oregon Woollyheads?

You might want to grow them if:

  • You have consistently wet or boggy areas in your landscape
  • You’re working on wetland restoration or habitat creation
  • You’re passionate about growing native plants, even the less glamorous ones
  • You want to support biodiversity with specialized native species
  • You live in USDA zones 7-10 within their native range

You probably shouldn’t grow them if:

  • You don’t have wet areas or reliable irrigation for wet conditions
  • You’re looking for showy ornamental plants
  • You want low-maintenance, drought-tolerant natives
  • You live outside their native range

Growing Oregon Woollyheads Successfully

The key to success with Oregon woollyheads is understanding their specialized needs:

Location: Choose the wettest spot in your garden – areas that stay moist year-round or experience seasonal flooding work best.

Soil: They tolerate various soil types as long as moisture levels remain high. Clay soils that hold water work particularly well.

Planting: As annuals, they grow from seed each year. Direct seeding in late fall or early spring in wet areas tends to work best, mimicking natural germination patterns.

Maintenance: Once established in suitable wet conditions, they require minimal care. The biggest challenge is maintaining adequate moisture levels.

Setting Realistic Expectations

Let’s be honest – Oregon woollyheads aren’t going to transform your garden into a magazine-worthy landscape. They’re small, subtle plants that serve specialized ecological functions. Think of them as the wetland equivalent of a supporting actor rather than the leading star.

Their greatest value lies in their authenticity as native plants and their role in supporting complete ecosystem function in wetland environments. If you’re creating habitat, restoring degraded wetlands, or simply want to grow something truly local and specialized, Oregon woollyheads can be a rewarding choice.

The Bottom Line

Oregon woollyheads represent native gardening at its most specialized. They’re not for everyone, and they’re certainly not for every garden. But for the right situation – wet, restoration-focused, within their native range – they offer gardeners a chance to grow something truly authentic to western wetland ecosystems.

If you have the right conditions and the right expectations, Oregon woollyheads can be a meaningful addition to your native plant collection. Just don’t expect them to steal the show – they’re more about quiet ecological contribution than dramatic garden impact.

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

Arid West

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Western Mountains, Valleys, and Coast

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Oregon Woollyheads

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

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Psilocarphus Nutt. - woollyheads

Species

Psilocarphus oregonus Nutt. - Oregon woollyheads

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