Post on 15-Jan-2016
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Botanical NomenclatureBotanical Nomenclature
Plants may have many common Plants may have many common namesnames
Plants have only one scientific namePlants have only one scientific name Scientific names are universally Scientific names are universally
acceptedaccepted
Binomial System of Binomial System of ClassificationClassification
Invented by the Swedish naturalist Linnaeus in the year 1753
The genus comes first and is always capitalized and italicized
The specific epithet comes after the genus and is always lower case and italicized
The SpeciesThe Species The genus and specific epithet
together form the “binomial” that identifies a species
Example: Cercis canadensis Eastern Redbud
A group of individual plants that have a common set of identifiable characteristics that are inheritable
Species come “true-to-type” from seed
The VarietyThe Variety A group of plants subordinate to the
species; differing from the species in one or more inheritable characteristics
Varieties come “true-to-type” from seed Written in lower case and italicized Two acceptable formats:
Cercis canadensis var. alba or Cercis canadensis alba
The VarietyThe Variety
Cercis canadensis Cercis canadensis var. alba
The CultivarThe Cultivar In ornamental horticulture cultivar
characteristics are, generally speaking, not inheritable
Cultivars, generally speaking, do not come “true-to-type” from seed
Cultivar names are always capitalized and written in single quotations
Example: Cercis canadensis ‘Forest Pansy’has maroon leaves that fade to green
The CultivarThe Cultivar
A single species may have many cultivarsJuniperus horizontalis ‘Blue Chip’Juniperus horizontalis ‘Plumosa’Juniperus horizontalis ‘Hughes’ etc.
It is possible to have a cultivar of a varietyGleditsia triacanthos inermis ‘Skyline’ orCornus florida rubra ‘Cherokee Chief’
Gleditsia triacanthosGleditsia triacanthos
Gleditsia triacanthos Gleditsia triacanthos varvar. inermis. inermis
Gleditsia triacanthos Gleditsia triacanthos varvar. inermis . inermis ‘Skyline’‘Skyline’
The EndThe End