About this tool

Search feature

Citrus nomenclature is rather complex due to the large number of synonyms and competing classifications (see Swingle & Reece 1967, Barrett & Rhodes 1976, Bayer et al. 2009). The numerous contributors to Cottin (2002) attempted to synthesize the large number of names, building on the "fine scale" system proposed by Tanaka (1954, 1969) and providing Swingle equivalents. We have relied heavily on this important work in our tool, adding additional synonyms based on more recent work (e.g., Mabberley 2004) where possible. Because users may be familiar with different names for the same cultivar, we've provided a search feature for the fact sheets at the top and bottom of each page. You may enter all or part of a cultivar name (e.g., "Hamlin" or "haml"), a group name (e.g., "sweet orange", or "sweet o"), or a scientific name (e.g., Citrus x aurantium or "citrus x"). However, the search usually works best when you use whole terms. Results will indicate in which section of the fact sheet the search term was found so that users may easily key in on the fact sheet that represents a synonym for their particular search term.

Names used as titles for fact sheets primarily follow those used by industry, breeders, and arboreta in the U.S. For cultivars, scientific names appear in the "Cultivar/taxon" category. To account for competing classifications, citations are provided to refer users to the source of competing names. For example, Imperial Grapefruit may be recognized as Citrus x aurantium L. [grapefruit group] 'Imperial' under the taxon concept of Mabberley (1997) and Bayer et al. (2009), or Citrus paradisi Macfad. 'Imperial' under the concept of Swingle and Reece (1967). Because not all cultivars are specifically treated in these references, some nomenclatural inferences were necessary, taking into account the scientific names and concepts generally accepted by the different authors. A distinction is made between names provided "in the sense of" (sensu) a particular treatment or "according to" (sec.) a particular treatment. The former suggests that inference at some level may have been necessary, while the latter indicates that a name was specifically mentioned in the cited text.