(N/A) The process of preparing a herbarium involves the following steps:
$(a)$ Collection: This step involves the collection of a healthy specimen of a particular plant species.
$(b)$ Pressing: The specimen is spread out and pressed between two sheets of paper to preserve its structure.
$(c)$ Drying: The pressed specimen is dried,usually under the sun or in a plant press,to remove moisture.
$(d)$ Poisoning: To prevent fungal or insect attacks,the specimen is treated with chemicals like mercuric chloride.
$(e)$ Mounting: The dried specimen is carefully mounted on a standard herbarium sheet of size $29 \times 41 \text{ cm}$.
$(f)$ Labelling: $A$ label is affixed to the sheet containing essential details.
$\rightarrow$ Tools required for collection include: Digger,pruning knife,sickle,vasculum (a metal box for carrying specimens),polythene bags,old newspapers,blotting paper,plant press,and field notebooks.
$\rightarrow$ The label on the herbarium sheet must provide the following information for taxonomical studies: Date and place of collection,English,local and botanical names,family,and the name of the collector.