This plant appears to be a flowering ground covering geranium, possibly a variety of Geranium macrorrhizum species.
It is an herbaceous perennial plant, considered to be hardy, drought tolerant and has gorgeous foliage which changes colour in the fall. As well, it is fragrant and produces attractive flowers in white and all shades of pink virtually. It can choke out weeds, due to it’s spreading rhizomes and yet is relatively pest free and maintenance free.
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Additionally, this below excerpt from the City of Ottawas site may be helpful:
|Bigfoot Geranium (Geranium macrorrhizum)The plant has deeply lobed leaves forming a mounding plant 20-30 cm (8-12″) tall with flower stalks in early summer bearing white, pink or magenta flowers (cultivar dependant). Due to the intense heat in summer in Ottawa, it should be grown in partial shade. Plant in moist organic/humus rich well drained soil. They tolerate alkaline soils.||
|Bloodred Geranium (Geranium sanguineum)The pubescent lobed leaves are less than 5 cm (2″) across and turn maroon after the first frost. Flower stalks rise out of the mounding plant, which is 30 cm (12″) tall by 60 cm (24″) wide, bearing magenta, rose or white flowers depending on the cultivar. It tolerates hot sunny spots in Ottawa. Plant it in rich, well-drained, moist soil.Note: There are many more species and cultivars of Geraniums that make superb ground covers.||