Geum japonicum, known as Asian herb bennet,[1] is a yellow-flowering perennial plant native to North America and East Asia, especially Japan.

It may be synonymous with Geum macrophyllum, the North American flower.

[2] However, in recent years, the Thunberg variant has received attention for other possible medical uses.

With regard to muscular recovery, an extract has been found to help muscles recover following "severe injury",[3] to reduce myocardial infarct size by 35–45% when administered following a heart attack.

[4] It also has possible anti-viral properties,[5] including action against HIV[6] and HSV.