Mollugo verticillata

About

Mollugo verticillata, the green carpetweed, is a rapidly spreading annual plant from tropical America. In eastern North America, it is a common weed growing in disturbed areas. It forms a prostrate circular mat that can quickly climb over nearby plants and obstacles. The species has been reported from every state in the United States except Alaska, Hawaii, and Utah, as well as from British Columbia, Manitoba. Ontario, Quebec, New Brunswick and Nova Scotia. Although considered an invasive weed, M. verticillata is also known to be edible. Archaeological evidence has shown that M. verticillata has been in North America for about 3000 years. Sometimes also referred to as "Indian chickweed", in China this plant is referred to as zhong leng su mi cao.

Summary from Wikipedia