This is the fourth volume in The Illustrated Flora of Illinois devoted to dicotyledons, or dicot plants. Dicots are the greatest group of flowering plants, exceeding the monocotyle­dons, or monocots. Dicots produce a pair of seed leaves during germination while monocots produce only a single seed leaf.

This volume contains four orders and ten families of dicots. The orders included in this volume are Malvales, Urticales, Rhamnales, and Euphorbiales. Within the Malvales are the families Tiliaceae, Sterculiaceae, and Mal­vaceae. The families Ulmaceae, Moraceae, and Urticaceae comprise the Urticales. Rhamnaceae and Elaeagnaceae make up the Rhamnales. The Euphorbiales include only the Thymelaeceae and the Euphorbiaceae.

The second edition of Flowering Plants: Flowering Rush to Rushes offers new material, including a preface, seventeen new illustrations of the additional species now known from Illinois, a revised list of illustrations, and an appendix of the additions and changes since 1970 in the identification, classification, and location of the plants included in the first edition. This new edition of the first volume in the multi-volume series of The Illustrated Flora of Illinois—which provides a working reference for the identification and classification of these plant forms in the state—includes flowering rushes, arrowheads, pondweeds, naiads, duckweeds, cattails, bur reeds, spiderworts, and rushes.

In his introduction, Robert H. Mohlenbrock defines terms and procedures used in the identification and classification of this group of flowering plants referred to as monocotyledons—plants that produce upon germination a single cotyledon or seed-leaf and are often identified by their tall, slender, grass-like leaves. He outlines the life histories and morphologies of the representative monocots and illustrates the plants’ habits and frequencies in Illinois.

Geared to the amateur as well as the professional botanist, the volume includes a glossary of definitions and identification keys to classify the plants according to order, family, genus, and species. The identifying characteristics of each descending class are also given in detail. The morphology of each species is outlined along with data on frequency of occurrence, related soil and climate conditions, and history of past collections. Among the 125 illustrations are detailed sketches of the important features of each species and maps indicating the geographical locations of each species in Illinois.

This volume, the eighth devoted to flowering plants in the Illus­trated Flora of Illinois series, is the third of several devoted to dicotyledons, which include such well-known plants as roses, peas, mustards, mints, nightshades, milkweeds, and asters. Mohlenbrock here represents four orders (Annonales, Berberidales, Nymphaeales, and Sarraceniales) and fifteen families of plants. As in previous volumes in this series, the common names are those used locally in Illinois. An illustration of each species depicts the distinguishing features and the habitat in Illinois.

This sixth volume of dicots contains three orders and eight families. The orders included are Solanales, Campanulales, and Santalales. Within the Solanales are the families Solanaceae, Convolvulaceae, Cuscutaceae, and Polemoniaceae. The Campanulales contain only the family Campanulaceae. The Santalales include the families Celastraceae, Santalaceae, and Viscaceae. As with each volume in this series Mohlenbrock includes a complete plant description, illustrations showing diagnostic features, distribution maps, and ecological notes.

Since the publication of the first edition of Smartweeds to Hazelnuts in 1987, thirteen additional species and one hybrid have been discovered in Illinois.  In addition, numerous nomenclatural changes have occurred for plants already known.

This second edition updates the status of the Polygonaceae, Hamamelidaceae, Platanaceae, Fagaceae, Betulaceae, and Corylaceae in Illinois. Each of the newly discovered species has been added and is fully illustrated. Updated nomenclature as well as Illinois distributional data are included for each species. In addition to the fourteen new plant illustrations, the appendix contains new information on the descriptions and the geographical locations of plants in the first edition, and revised identification keys.

Robert H. Mohlenbrock and Paul M. Thomson Jr. have included a complete description, illustrations showing diagnostic features, distribution maps, and ecological notes for each plant included in this volume.

This new edition will be invaluable to scholars of botany as well as laypersons interested in observing plants in their natural habitat.

This eighth volume in the comprehen­sive Illustrated Flora of Illinois series is the seventh volume devoted to flowering plants (the eighth volume is devoted to ferns) and the second treating dicotyledons, which include such well-known plants as roses, peas, mustards, mints, nightshades, milkweeds, and asters. The previous volume on dicots, Flower­ing Plants: Hollies to Loasas, was pub­lished in 1978.

In the present volume, Mohlenbrock includes three orders of vascular plants encompassing five families. The orders are Salicales and Tamaricales, of the Salicaceae and Tamaricaceae families, and Capparidales, of the Capparidaceae, Re­sedaceae, and Brassicaceae families. In all, 44 genera and 117species are treat­ed in this volume, each species illustrat­ed in detail.