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Herbarium methodology-collection and preservation of plant specimens, World and Indian herbaria

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Herbarium methodology-collection and preservation of plant specimens, World and Indian herbaria:- Herbarium:-  A Herbarium is defined as a collection of plants that usually have been dried, pressed, preserved on sheets and arranged according to any accepted system of classification for future reference and study. Methods of preparation of herbarium specimens:-  The preparation of a herbarium involves:  1. Field visits and collection of specimens  2. Pressing and drying 3. Mounting on a herbarium sheet 4. Preservation 5. Labeling 6. Storage 1. Field visits and specimen collection:-  A complete specimen should possesses all parts including root system, flowers and fruits. Therefore, regular field visits are necessary to obtain information at every stage of growth and reproduction of a plant species. In the fields, the tools required are mainly trowel (digger) for digging roots, scissors and knife for cutting twigs, a stick with a hook for collection of parts of tall trees, a field note b