Hemp-agrimony is a perennial herb (3) that flowers in late summer and early autumn (6). The flowers are pollinated mainly by butterflies and moths, and to a lesser extent by bees and flies. Cross-pollination with flowers in the same flower head can also occur, however (2).  In The compleat herbal of 1694, hemp-agrimony was listed as a cure for, amongst other things, catarrh and coughs, obstructions of the urine and jaundice (6).