Note a — PREFACE.
Reading edition
According to Bicknell (Bul. Torr. Bot. Club, 23: 508–525, 1896), the name Agrimonia eupatoria L., long used in local floras and text-books for the agrimony of the Eastern States, has been doing duty for a group of related species, of which at least five are now clearly recognized. Furthermore, Doctor Britton (Bul. Torr. Bot. Club, 18: 366, 1891) states that the true Agrimonia eupatoria is not known at all as an American plant. The native plant to which the name Agrimonia eupatoria has been most frequently applied by American authors is Agrimonia hirsuta (Muhl.) Bicknell.