Which one of the taxonomic aids can give comprehensive account of complete compiled information of any one genus or family at a particular time?

Taxonomic keys are aids for rapid identification of unknown plants. Flora is an inventory of the plants of a defined geographical region. Herbarium is a safe place for storing specimens as well as provide suitable atmosphere for research. Monograph is a comprehensive taxonomy treatment of a taxonomic group, generally a genus or a family, providing all taxnomic data relating to the group.