Gardner’s Yampah | Perideridia gairdneri - Benton Soil And Water Conservation District

Gardner’s Yampah | Perideridia gairdneri

A close-up of delicate white flowers growing among dry grasses. The flowers have small, clustered blooms on slender stems.

A FALL BULB AND SEED SALE ITEM

This member of the carrot family has umbels of small white flowers, leafy stems, and edible roots. Grows from a bulb underground.

Plant Details

Habitats	Mixed Conifer Forests Upland Prairie and Savanna, Wet Prairie
Habitat Notes	Woodlands, dry and wet meadows
Phenology	Perennial; flowering June-September
Mature Height	1-3 ft
Shade Preference	Full sun, part shade
Soil Tolerance	Moist soils
Ethnobotany	Yampah's edible roots continue to be a culturally significant food source for Indigenous tribes across the Pacific Northwest

A close-up of a bee collecting nectar from delicate pink flowers, showcasing nature's pollination process.

Native Plant Database

We have a large searchable database of plants that are native to the Willamette Valley and other parts of Benton County. View images and filter the list by plant characteristics

A cluster of unique, dark-colored flowers among vibrant green foliage and other colorful wildflowers.

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A lush forest scene with tall oak trees, green leaves, moss, and undergrowth, under a clear blue sky.

Oak Woodland

Oregon White Oaks dominate these woodlands and may support an open to moderately shrubby understory. Over thirty percent of the canopy shades the ground, but still filter light allowing oak seedling…

A scenic view of a vibrant field of purple flowers, a rustic barn, green hills, and a blue sky with fluffy clouds.

Upland Prairie and Savanna

Upland prairies or open grasslands are among the most threatened ecosystems in Oregon. Historically, they occurred across the Willamette Valley and are vegetated by perennial grasses and annual or…

A dense forest with tall trees and lush green undergrowth.

Mixed Hardwood-Conifer Forest or Woodland

Mixed hardwoods and conifers characterize this habitat which is widespread in western Oregon in the medium elevations of the hills of the Coast Range. Precipitation is higher in this habitat than in…

Wet Prairie

Wet prairies were once a common habitat in the floodplain of the Willamette River. These habitats occur on poorly drained clay soils or shallow soils above bedrock. Seasonal flooding creates anaerobic…