Azolla as a Green Manure: Use and Management in Crop Production

This book was written primarily for nonbotanists, and so has attractive line drawings rather than keys for identification of 79 species, varieties, and forms in 28 genera found in Missouri.Introductory material includes fern morphology, collecting, preservation, and habitats.A pictorial guide using small illustrations and based mostly on frond morphology and habitat leads readers to genera.Within the genus, each taxon is illustrated with an attractive habit sketch and detailed drawings of diagnostic characters.The illustrations, plus a brief description, permit identification of the material.