Definition of "agrimony"

I grant, my Pils are bitter, I, and costly; / But their effects are rare, Diuine, and holsome, […] / I grant, theres bitter Egrimony in vm, / And Antimony, I put mony in all still: / And it works preciously […]

1620, Thomas Middleton, William Rowley, The World Tossed at Tennis‎, London

So he put the four shoes in a graceful group on the turf and looked at them. And seeing them there among the grass and springing agrimony, it suddenly occurred to him that both pairs were exceedingly ugly to see.

1897, H. G. Wells, chapter 9, in The Invisible Man‎, New York: Pocket Books, published 1957, page 41