The scheme also aims to follow botanical tradition, in terms of the distribution categories used in works like the Flora Europaea, Flora Malesiana, or Med-Checklist. This approach occasionally leads to departures from political boundaries. Thus the scheme follows Flora Europaea in placing the eastern Aegean islands (such as Lesbos, Samos and Rhodes) in the West Asia region, rather than in Europe where they belong politically as part of Greece.
The scheme aims to align with botanical classifications found in works such as Flora Europaea, Flora Malesiana, or Med-Checklist. This approach sometimes conflicts with political divisions. Consequently, the scheme places eastern Aegean islands (such as Lesbos, Samos, and Rhodes) under West Asia rather than Europe, despite their political affiliation to Greece.