Agrimonia eupatoria is a species of agrimony that is often referred to as common agrimony, church steeples or sticklewort.
The whole plant is dark green with numerous soft hairs. The soft hairs aid in the plant's seed pods sticking to any animal or person coming in contact with the plant. The flower spikes have a spicy odor like apricots.
Inhibition of HBsAg release against hepatitis B virus (HBV) was investigated in an aqueous extract prepared from the aerial parts (stems and leaves) of Agrimonia eupatoria. The inhibitory effect on HBsAg secretion was footed using aqueous extracts of Agrimonia eupatoria at four different temperatures (37 degrees C 45 degrees C, 55 degrees C and 60 degrees C), and the extract prepared at 60 degrees C was found to have the greatest effect. The inhibitory activity of Agrimonia eupatoria extracts on HBsAg secretion varied over the growing season and was the highest at mid-July.