Oregon Avens | Geum macrophyllum - Benton Soil And Water Conservation District

Oregon Avens | Geum macrophyllum

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Oregon avens flower and leaves.

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A close up of Oregon avens flower and flower head.

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Oregon avens leaves.

Herbaceous perennial with large, toothed, 3-lobed basal leaves. Flowers are terminal with five delicate, yellow petals. Tolerates seasonal flooding.

Plant Details

Habitats	Upland Prairie and Savanna, Riparian Forests, Bottomland Forests, Mixed Hardwood-Conifer Forest or Woodland, Wet Prairie
Habitat Notes	Found in moist woods and meadows, and near streams. This ground cover species spreads easily once established
Phenology	Perennial; flowering May-June
Mature Height	Up to 3 feet
Shade Preference	Full sun, part shade
Soil Tolerance	Moist, well-drained soil
Special Uses	Attracts insects

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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

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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 lush green riparian forest with tall red alder trees and a rocky stream running through it.

Riparian Forests

Riparian areas are defined by NRCS as ecosystems that occur along waterways and water bodies. They serve as the transition between aquatic and terrestrial zones.

Bottomland Forests

Bottomland forests are generally used to describe forests which are comprised of both hardwood and softwood tree species that occur on low-elevation, alluvial floodplains or lower terraces of rivers…

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…