C.H. Jones’ (1943) publication on the rare plants of Ohio (Castanea 8:81-108) is believed to be the first comprehensive list of rare plants for any state (R.L. Stuckey. 1982. Ohio Biol. Surv. Biol. Notes No. 16:5-9). The book under review is the second recent publication on the endangered (E) and threatened (T) plants of Ohio.