- Taxa of the lowest rank are always included. Higher taxa are included only if endemic.
- This category follows the World Geographical Scheme for Recording Plant Distributions, in which the Leeward Islands are defined as comprising Antigua and Barbuda, Anguilla, Aves Island, the British Virgin Islands, Guadeloupe, Montserrat, the Netherlands Leeward Islands, Saint Kitts and Nevis, Saint Martin and Saint Barthélemy (these two treated together), and the United States Virgin Islands.