Practical Botany: Structural and Systematic, the Latter Portion Being an Analytical Key to the Wild Flowering Plants, Trees, Shrubs, Ordinary Herbs, Sedges and Grasses of the Northern and Middle United States East of the Mississippi

Practical Botany: Structural and Systematic, the Latter Portion Being an Analytical Key to the Wild Flowering Plants, Trees, Shrubs, Ordinary Herbs, Sedges and Grasses of the Northern and Middle United States East of the Mississippi