Appearance
Silverweed is a low-growing herbaceous plant with creeping red stolons that can be up to 80 cm long. The leaves are 10–20 cm long, evenly pinnate into in crenate leaflets 2–5 cm long and 1–2 cm broad, covered with silky white hairs, particularly on the underside. These hairs are also present on the stem and the stolons. These give the leaves the silvery appearance from which the plant gets its name.The flowers are produced singly on 5–15 cm long stems, 1.5-2.5 cm diameter with five yellow petals. The fruit is a cluster of dry achenes.
Naming
It is known by the common names "silverweed", common silverweed or silverweed cinquefoil.
Habitat
Silverweed is most often found in sandy or gravelly soils, where it may spread rapidly by its prolific rooting stolons. It typically occurs in inland habitats, unlike "A. egedii", which is a salt-tolerant coastal salt marsh plant.
Evolution
"Argentina anserina" achenes are rather rare in Pliocene fossil floras of the East Europe but common in the Pleistocene.References:
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