| Ugni Turcz. |
5:308 |
 AMERICAN PUBLIC GARDENS ASSOCIATION |
| Uldinia J. M. Black |
- |
AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA) |
| Ulearum Engl. |
- |
INTERNATIONAL AROID SOCIETY (I.A.S.) |
| Ulex L. |
4:550 |
AMERICAN PUBLIC GARDENS ASSOCIATION |
| Ulmus L. |
3:80 |
THE MORTON ARBORETUM |
| Umbellularia (Nees) Nutt. |
3:322 |
AMERICAN PUBLIC GARDENS ASSOCIATION |
| Ungnadia Endl. |
5:155 |
AMERICAN PUBLIC GARDENS ASSOCIATION |
| Uranthoecium Stapf |
- |
AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA) |
| Urceolina Roxb. |
1:322 |
ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.) |
| Urera Gaudich. |
3:102 |
AMERICAN PUBLIC GARDENS ASSOCIATION |
| Urginea Steinh. |
1:220 |
ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.) |
| Urocarpus J. Drumm. ex Harv. |
- |
AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA) |
| Urospatha Schott |
- |
INTERNATIONAL AROID SOCIETY (I.A.S.) |
| Urospathella Bunting |
- |
INTERNATIONAL AROID SOCIETY (I.A.S.) |
| Urostemon B. Nord. |
6:640 |
AMERICAN PUBLIC GARDENS ASSOCIATION |
| Ursulaea Read & H. U. Baensch |
- |
BROMELIAD SOCIETY INTERNATIONAL (B.S.I) |
| Utricularia L. |
6:409 |
INTERNATIONAL CARNIVOROUS PLANT SOCIETY (I.C.P.S.) |
