Glossary: Combination

Combination: The combination of a generic name and one or two epithets.

Rebutia heliosa is the combination of a generic name and a specific epithet (called a binary combination or binomial).

Rebutia neocumingii subsp. pulquinensis is the combination of a generic name, a specific epithet and an infraspecific epithet.

Astrophytum subgen. Stigmatodactylus is the combination of a generic name and a subdivisional epithet.

Epiphyllum phyllanthus subsp. plattsii and Epiphyllum phyllanthus var. plattsii are instances of the same combination at different ranks (subspecies and variety).