[Cinquefoils: The Genera Comarum, Dasiphora, Drymocallis and Potentilla East of the Cascade Mountains of Oregon and Washington]

Newberry's Cinquefoil

Potentilla newberryi

Synonyms: Ivesia gracilis, Potentilla newberryi var. arenicola

Newberry's cinquefoil observed on the shoreline of Thompson Reservoir at East Bay Campground, south of Silver Lake, OR.......June 19, 2020.

Characteristics:

Newberry's cinquefoil is a low, short-lived perennial, prostrate to ascending in form, leafy throughout, and with many stems. The basal leaves are few and similar to the numerous stem leaves. The leaves are compound pinnate with 7-15 leaflets, with each leaflet dissected into 3-7 linear, elliptic, narrowly oblong, or spatulate, hairy segments. Individual leaves are 2-4 cm long.

The 5 petals are white or cream-colored, obovate in shape, with 20 stamens. The petals are spreading and obovate in shape, ranging from 5-6 mm long. The sepals are spreading and lanceolate in shape, ranging from 4-5 mm long. The flowers are fragrant, and may be hidden by the foliage.

Habitat:

Newberry's cinquefoil is found in dry water courses, roadside ditches in dry areas, vernal pools and along dry lake shores.

Range:

Newberry's cinquefoil is found from south-central Washington south through northeastern California.

Newberry's cinquefoil observed on the shoreline of Thompson Reservoir at East Bay Campground, south of Silver Lake, OR.......June 19, 2020.

Newberry's cinquefoil from roadside 12 miles NW of Silver Lake, OR.......late June, 1995.

Paul Slichter