Schemes including Ilex aquifolium

• NatureServe Explorer: An online encyclopedia of life. Version 7.1 (ELEMENT_GLOBAL.2.131239) Ilex aquifolium
• Calflora (4317) Ilex aquifolium
• New England Wild Flower Society's Flora Novae Angliae Ilex aquifolium
• NatureWatch NZ Ilex aquifolium
• GBIF (5414222) Ilex aquifolium
• NPSpecies (284423) Ilex aquifolium