[2][3] Eurybia kingii is a small perennial herb rarely more than 12 centimeters (2.8 inches) tall from a woody underground caudex.

[1] Due to the taxonomic complexity a later reclassification to Tonestus kingii was argued for by the Asteraceae specialist Guy L. Nesom in a 1991 paper.

[6] Returning to the subject in 2009, Guy L. Nesom proposed its inclusion in Eurybia.

[5][9] Eurybia kingii is limited to just seven counties in Utah in the western half of the state, Box Elder, Cache, Webber, Salt Lake, Utah, Juab, and Millard.

[5] Eurybia kingii was evaluated by NatureServe as "Vulnerable" (G3) in 1999, with the same rank at the state level because it endemic to Utah.