How can species that exhibit distinct differences from the general species be categorized?

Species that exhibit distinct differences from the general species can be categorized using the terms "varieties" and "cultivars." A variety refers to a naturally occurring subgroup within a species that displays specific, inheritable characteristics, such as size, flower color, or leaf shape. Cultivars, on the other hand, are cultivated varieties that have been selectively bred by horticulturists for particular traits, often to enhance aesthetic appeal or improve growth characteristics.

This classification system allows arborists and horticulturists to communicate clearly about plants with specific traits and to manage them effectively based on their unique needs or characteristics. Such categorization is essential for tasks including breeding, conservation, and landscape design, as it enables the identification and selection of plants that meet specific criteria.

The other options, while related to plant classification, do not specifically focus on the distinct differences at the level of individual species as effectively as varieties and cultivars do. Classes and families refer to broader taxonomic categories, genera and species identify higher-level groupings and individual species, and orders and divisions cover even larger classifications that may include many different species. Thus, the emphasis on the nuances of varieties and cultivars makes them the most suitable choice for categorizing species with distinct differences.