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Potentilla reptans
''Potentilla reptans'', known as the creeping cinquefoil, European cinquefoil or creeping tormentil, is a plant in the Rosaceae family.
It is a creeping perennial plant native to Eurasia and Northern Africa and naturalized elsewhere.〔(USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network (GRIN). National Germplasm Resources Laboratory, Beltsville, Maryland. (29 May 2013) )〕 Its trailing stems root at the nodes. Leaves are borne on long stalks. It blooms in June - August with yellow flowers (about 2 cm in diameter) that have 5 heart-shaped petals. It is quite common. Could be easily confused with silverweed. The butterfly known as the Grizzled Skipper is known to favour this plant which is often found growing in crushed masonry in the South of England.
Alcoholic extracts from roots of Potentilla reptans showed a moderate antimicrobial activity against common wound pathogens.〔(Watkins F, Pendry B et al. 2012. Antimicrobial assays of three native British plants used in Anglo-Saxon medicine for wound healing formulations in 10th century England. )〕
Potentilla reptans can be an invasive weed in lawns and flowerbeds and difficult to eradicate, particularly when it competes with and infests established groundcovers. All of the taproots must be dug up, or the plant will reappear.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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