| arum italicum | | USA: District of Columbia; 3501 New York Avenue NE; U. S. National Arboretum, Stop 4, Azalea collection hilltop footpaths | | 1243025955 |
| arum italicum | | USA: District of Columbia; 3501 New York Avenue NE; U. S. National Arboretum, Stop 4, Azalea collection hilltop footpaths | | 1243024963 |
| arum italicum | | USA: District of Columbia; 3501 New York Avenue NE; U. S. National Arboretum, Stop 4, Azalea collection hilltop footpaths | | 1243024130 |
| arum italicum | | USA: District of Columbia; 3501 New York Avenue NE; U. S. National Arboretum, Stop 4, Azalea collection hilltop footpaths | | 1243023516 |