Comarum palustre

The stem is green to reddish-brown, finely hairy at first, low sprawling and vine-like, with long trailing stems up to 1.5 m (5 ft) long or more, scrambling over other plants and occasionally reaching a height of 45 cm (1 ft) but usually lower.^[1][3] The stems root readily at the base and higher up wherever they are in contact with the ground or water. The leaves are glaucous green with three to seven (mostly five) narrow leaflets 3–6 cm (1–2 in) long with coarsely toothed margins. The flowers are produced in loose clusters at the apex of the stems; they vary from red to purple, and are 20–30 mm (1–1 in) in diameter. They have five (occasionally six) large sepals and five (occasionally six) smaller, darker petals, and a ring of spatula-shaped stamens surrounding the receptacle. Flowering is in late spring to summer, from late May to July.^[1] The fruit is like a small dry strawberry.

Marsh cinquefoil prefers peaty soils but can also grow in moist sandy areas. It flourishes in USDA Zones 3–9.

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  Foliage in spring, Czech Republic
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  Flower after pollen harvest (with honey bee), Finland
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  Dried seed heads with seeds, Shetland, UK
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  Stem showing rooting along its length. Quebec, Canada