"There was silence in the tepee. Sitting Bull laid his
tomahawk and knife on the ground, and began to
fill his long pipe with tobacco and killikinick, the
dried scrapings of willow bark. No one spoke. The
chief looked at the fire, and took no notice of us until
he had puffed at his pipe for a few moments

When I was a small boy, I was shown a small flowering plant, and was told that it was "killikinick'.
Indian tobacco. Wish I knew how to reconcile the apparent conflict.

From a dictionary:
Kinnikinic
(Kin`ni*ki*nic") n. [Indian, literally, a mixture.] Prepared leaves or bark of certain plants; — used
by the Indians of the Northwest for smoking, either mixed with tobacco or as a substitute for it.
Also, a plant so used, as the osier cornel and the bearberry [Spelled also kinnickinnick and killikinick.]

Mama and her brothers used to smoke rabbit tobacco when they were kids. I have no idea what rabbit tobacco really is.

killikinick

Regarding the apparent disconnect between killikinick and kinnikinick, the AHD traces the word to the Unami [Delaware language] kelekkeníikkan where those e letters are actually upside down and therefore a schwa.