| Ammophila arenaria (L.) Link | | a | | Ammophila arenaria (L.) Link | | 2911 | |
| Ammophila breviligulata Fernald | | a | | Ammophila breviligulata Fernald | | 100492 | |
| Ammophila baltica (Flüggé ex Schrad.) Link | ×Ammocalamagrostis baltica (Flüggé ex Schrad.) P. Fourn. | | | Ammophila baltica (Flüggé ex Schrad.) Link | Ammocalamagrostis baltica (Flüggé ex Schrad.) P. Fourn. | 315924 | 315923 |
| Ammophila arenaria (L.) Link subsp. arenaria | | a | i | Ammophila arenaria (L.) Link subsp. arenaria | | 408172 | |
| Ammophila arenaria (L.) Link subsp. arundinacea H. Lindb. | | a | i | Ammophila arenaria (L.) Link subsp. arundinacea H. Lindb. | | 408173 | |