[a] 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.
[b] The name “true unicorn-root” has long been applied to _Aletris
farinosa_, but as “unicorn-root” was the common name first given to
_Chamaelirium luteum_ (_Helonias dioica_), this should more properly
be called the true unicorn-root and _Aletris farinosa_ the false
unicorn-root.
[c] The name “unicorn-root” was first applied to _Chamaelirium luteum_,
and the designation “true unicorn-root” would seem to belong more
properly to that species than to _Aletris farinosa_, to which the name
unicorn-root was given later, and which may thus be called “false
unicorn-root.”
[d] Some authors hold that this plant belongs to the genus _Leptilon_
and that its name should be _Leptilon canadense_ (L.) Britton. The
Pharmacopœia is here followed.
[e] _Phytolacca americana_ L. by right of priority should be accepted,
but _P. decandra_ L. is used in conformity with the Pharmacopœia.
[f] _Rhus radicans_ L. was formerly believed to be a variety of _Rhus
toxicodendron_ L., but the two are now regarded as distinct species,
and the leaves from both have been used under the pharmacopœial name
(U. S. P. 1890) Rhus toxicodendron.
[g] Although the combination _Sassafras sassafras_ (L.) Karst. should
be accepted by strict right of priority, the usage of the Pharmacopœia
is followed.
[h] Although the combination _Taraxacum taraxacum_ (L.) Karst. should
be accepted by right of priority, the usage of the Pharmacopœia is
followed.
[i] Some authors hold that this plant belongs to the genus Leptandra
and that its name should be _Leptandra virginica_ (L.) Nutt. The
Pharmacopœia is here followed.