| Wiss. Name | Deutscher Name | HE | NW | NO | SW | SO |
| Ulex europaeus | Stechginster | T | T | T | T | T |
| Ulmus glabra | Berg-Ulme | * | * | * | * | * |
| Ulmus laevis | Flatter-Ulme | * | V | * | * | * |
| Ulmus minor | Feld-Ulme | * | * | T | * | 3 |
| Urtica dioica | Große Brennessel | * | * | * | * | * |
| Urtica membranacea | Geschwänzte Brennessel | u | - | - | u | - |
| Urtica pilulifera | Pillen-Brennessel | u | - | u | u | - |
| Urtica subinermis | Auen-Brennnessel | * | * | * | * | * |
| Urtica urens | Kleine Brennessel | * | * | * | * | * |
| Utricularia australis | Südlicher Wasserschlauch | * | * | * | * | R |
| Utricularia bremii | Bremis Wasserschlauch | 1 | - | 1 | 0 | - |
| Utricularia intermedia | Mittlerer Wasserschlauch | 0 | - | - | 0 | - |
| Utricularia minor | Kleiner Wasserschlauch | 0 | - | 0 | 0 | - |
| Utricularia stygia | Dunkler Wasserschlauch | 0 | - | - | 0 | - |
| Utricularia vulgaris | Echter Wasserschlauch | 2 | - | - | 2 | - |