Which taxonomical aid serves as a quick referral system in taxonomic studies?

… is a book (taxonomic aid) which contain information about habitat, distribution, climate description and index of plant found in a particular area

Which taxonomical aid provide all information about a particular taxon like order or family

… is a book (taxonomic aid) which contain information about habitat, distribution, climate description and index of plant found in a particular area

… is a book (taxonomic aid) which contain information about habitate, distribution, climate description and index of plant found in a particular area

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

A preserved specimen lacks a label indicating its origin. Which taxonomical aid would be LEAST useful in determining its geographical distribution?