In plant identification, individuals are assigned to descending series of related plants, based on their known common characteristics. For example, a marigold plant is first placed in a more distant group with plants that have seed, then among seed plants with flowers, and eventually in the most closely associated groups of varieties of marigold. In terms of botanical nomenclature (naming plants), Carolus Linnaeus is credited with developing the current Latin-based system called the binomial nomenclature (because an individual is given two names, as opposed to the polynomial system, which was more descriptive). The international body that sets the rules for naming plants by this system publishes the International Code of Botanical Nomenclature (ICBN)to provide guidelines for standardizing the naming of plants. These rules are revised as new scientific evidence becomes available.
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