Plants
- Ugli fruitCitrus reticulata × Citrus paradisi
- Ulm de TurkestanUlmus pumila
- ulmusulmus
- Ulmus hollandica 'Wredei'Ulmus hollandica 'Wredei'
- Umbrella BambooFargesia murielae
- Umbrella TreeSchefflera actinophylla
- Unbranched Bur-reedSparganium emersum
- Uvularia grandifloraUvularia grandiflora