Mohlenbrock's landmark Guide, so heralded at its initial appearance in 1975, has now been revised to include nearly a five percent increase in the number of taxa occurring uncultivated in the state of Illinois. Here are 3,204 taxa of ferns, gymnosperms, and flowering plants. Along with the addition of many new taxa, Mohlenbrock notes where the status of several taxa has been changed and where nomenclatural revisions have been...