List of Orchidaceae genera

The most up to date list of accepted genera, natural nothogenera, species and natural nothospecies with their synonyms can be found on the World Checklist of Selected Plants Families Search Page and Plants of the World Online published by the Royal Botanic Gardens, Kew.

Orchids were traditionally defined by morphological similarity (structure of their flowers and other parts).

However, recent changes to nomenclature have been driven primarily by DNA studies and also by re-examination of herbarium specimens.

This has led to a reduction of genera and species as well as re-circumscription of subfamilies, tribes and subtribes.

There are five recognized subfamilies:[1] As of July 2024, Plants of the World Online accepts 703 genera.