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Comarum palustre
Also called Purple Marshlocks, Marsh Five Fingers, Purple Cinquefoil, Purple Marsh Cinquefoil
Comarum palustre (syn. Potentilla palustris), known by the common name marsh cinquefoil, also purple marshlocks and swamp cinquefoil, is a waterside rhizomatous subshrub. It has a circumboreal distribution, occurring throughout cool temperate Asia, Europe, and North America, particularly in northern regions. It is most commonly found on lake shores, marshy riversides and stream margins, often partly submerged with foliage floating. It is a parent of some Fragaria–Comarum hybrids, ornamental plants produced by crossing with strawberries.
Marsh cinquefoil prefers peaty soils but can also grow in moist sandy areas. It flourishes in USDA Zones 3–9.
Text excerpted from the Wikipedia article Comarum palustre by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
