Botanical name — the scientific naming of plants

Structure and components

Most botanical names take a few standard forms. At species level the name is binomial: a capitalized genus name followed by a lowercase specific epithet, usually printed in italics (for example, Bellis perennis), and may be followed by an author citation. Names below the species level use a rank marker such as subsp., var. or f. to indicate subspecies, variety or form. Cultivated selections and hybrids follow additional conventions and may be governed by a separate cultivated-plant code. For practical guidance on cultivated and horticultural names see cultigen naming rules and the cultivars code at ICNCP resources.

Rules, types and priority

The nomenclatural codes set principles intended to promote stability and universality: names are tied to type specimens (physical reference specimens or illustrations), priority of publication determines which name is accepted when synonyms exist, and specific rules control formation, spelling and authorship. The main regulatory text is discussed in many manuals and databases; authoritative code texts explain scope and application to groups such as algae, fungi and other traditionally plant-treated organisms. See the formal code outline at international code overview and coverage notes for fossils and non-vascular groups at fossil plant considerations and cyanobacteria.

History and scope

Modern botanical nomenclature developed from systems of descriptive naming; the consistent use of binomials was popularized by Carl Linnaeus in the 18th century and refined by later botanists and congresses to address growing taxonomic knowledge. Over time the codes have expanded scope to include fungi and photosynthetic protists as well as conventionally recognized plants. Specialized groups (for example, fungi, oomycetes and slime molds) are treated in the code and in associated literature; see explanatory entries for fungi, chytrids, oomycetes and slime moulds.

Uses and practical importance

Botanical names are essential in biodiversity conservation, legislation, trade, agriculture and scientific communication. They avoid ambiguity caused by local common names and allow precise linkage to type specimens in herbaria, genetic sequence records, and conservation status assessments. Databases, floras and field guides frequently cross-reference common names in several languages; examples include French and Spanish common names and national floras. For cross-disciplinary lists and vernacular translations consult resources such as regional plant lists and multilingual glossaries at language resources.

Examples and distinctions

Consider the widespread lawn daisy: the scientific name Bellis perennis identifies the species irrespective of vernacular terms such as "daisy" or local names. Cultivars are named differently to indicate human-selected forms: the golden-variegated horticultural form is written as Bellis perennis 'Aucubifolia', following cultivar-naming conventions; see cultivated-plant registration pages at example registry and naming guidance at cultivar rules summary. Hybrids and intergeneric crosses use the multiplication sign and sometimes special notations; hybrid notation and orthography are described in technical sections of the codes and reference works at hybrid naming and orthography guidance.

Key points and further reading

• Botanical names strive for international stability and are governed by formal codes; introductory guides are available from botanical gardens and taxonomic societies (society guidance).
• Names are linked to types and governed by priority, but exceptions and conserved names exist to promote stability (conservation of names).
• Different notations exist for cultivated plants, hybrids and infraspecific taxa; official registries and code documentation provide the detailed rules (registries, detailed code text).

Understanding botanical names supports reliable identification, communication and record-keeping across languages, disciplines and legal frameworks. Specialist manuals, online floras and national checklists are recommended for those applying names in research, horticulture or conservation.