SafePlants

Pacific Silverweed: A Coastal Herb

Pacific silverweed, a low-growing perennial, is a fascinating plant with a rich history and ecological presence along the Pacific Coast. Its connection to indigenous cultures and unique characteristics make it a compelling subject for plant enthusiasts.

Common and Scientific Names

• Common Names: Pacific silverweed, silverweed cinquefoil, silverweed, Egede's cinquefoil, Beach Cinquefoil
• Scientific Names: Argentina pacifica, Potentilla anserina ssp. pacifica, Potentilla egedii

Taxonomy and Nomenclature

• Family: Rosaceae (Rose family)
• Synonyms and Alternative Classifications:
  • Potentilla pacifica
  • Argentina anserina ssp. pacifica
  • Potentilla egedii var. grandis
  • Argentina egedii (Wormsk.) Rydb. subsp. egedii
  • Potentilla anserina L. ssp. pacifica (T.J. Howell) Rousi
  • Argentina egedii (Wormsk.)

Distribution and Habitat

This plant thrives along the Pacific Coast, ranging from Alaska to southern California. It is commonly found in saline wetlands, marshes, tidal flats, beach dunes, and sandy beaches near the ocean.

Morphological Characteristics

• Pacific silverweed is a low-growing perennial, typically reaching about 6 inches in height, but may grow up to 0.5m (1ft 8in)
• It spreads by runners.
• The leaves are pinnately compound and can grow up to 15 inches long.
• Leaves are green with silvery undersides, a key identifying feature.
• Petioles are nearly hairless.
• The flowers are hermaphrodite (have both male and female organs).

Ethnobotanical Uses

Pacific silverweed has a long history of use as a food source by Northwest Coast Indian peoples. The roots were a staple food, consumed raw, boiled, or roasted. The extract of the roots, along with rhizomes of springbank clover, were important foods for Native groups of British Columbia.