What plant did the native Americans use in the peace pipe?

According to this article, it was usually tobacco with some herbs thrown in. The article says that the smoke was not inhaled. This article says that marijuana did not cross the Mexican border until the early 1900’s.

Wild ”...tobacco and various aromatic herbs – called kinnikinnick…”
“Although some of the tobacco smoked by Indians grew wild, various tribes cultivated it in order to have a predictable supply available and to be able to trade it to other tribes.”
-from Time-Life Books, “THE OLD WEST” series, The Indians.

this is an excellent article. The pipe is a prominent part of the Choctaw National Seal

Off topic, but not completely, Native social distancing.