Families (As per APG IV)

 
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

U

Ulmaceae - 8 ( Holoptelea integrifolia, Ulmus × androssowii var. virgata, Ulmus × brandisiana, Ulmus bergmanniana, Ulmus lanceifolia, Ulmus parvifolia, Ulmus villosa, Ulmus wallichiana)

Urticaceae - 20 ( Boehmeria glomerulifera, Boehmeria hamiltoniana, Boehmeria listeri, Boehmeria penduliflora, Boehmeria rugulosa, Boehmeria tenuistachys, Boehmeria zollingeriana, Debregeasia ceylanica, Debregeasia longifolia, Debregeasia saeneb, Debregeasia wallichiana, Dendrocnide meyeniana, Dendrocnide sinuata, Oreocnide integrifolia var. sylvatica, Oreocnide sylvatica, Pipturus arborescens, Pipturus velutinus, Pouzolzia sanguinea var. fulgens, Sarcochlamys pulcherrima, Villebrunea integrifolia)