The word flora has two meanings in biology. One definition means all of the vegetation of a region, such as the flora of North America; the other means a book or other work that accounts for all of the plants of a region, such as The Flora of the Great Plains or The Illustrated Flora of North Central Texas. These books and others like them catalog the plants of a region and include information on distributions and habitat requirements, taxonomic keys for plant identification, and current nomenclature for the plants. The more sumptuous floras also include plant illustrations, distribution maps, and other sources of information. The flora of a region is a dynamic thing, and through time new plants are introduced, old plants change their distributions, some plants go extinct, botanical inaccuracies must be corrected, and new nomenclature must be accounted for. A flora is never truly completed...