Julian Steyermark’s Flora of Missouri has been a standard reference for the plants of Missouri and the greater mid-western United States since its first publication in 1963. It has been generally accepted as one of the best North American floras since that time. Dr. George Yatskievych and his colleagues have undertaken a revision upon that original work and their progress has been eagerly followed by many. Great anticipation preceded the publication of this magnificent volume that made its appearance rather quietly earlier this year. The result is a masterpiece!