Urceolaria cinerea
Urceolaria clausa
Urceolaria cretacea
Urceolaria diacapsis
Urceolaria ferruginea
Urceolaria gypsacea
Urceolaria indurata
Urceolaria minor
Urceolaria scruposa
Urceolaria scruposa f. minor
Urceolaria scruposa f. ochracea
Urceolaria scruposa f. plumbea
Urceolaria scruposa v. albissima
Urceolaria scruposa v. arenaria
Urceolaria scruposa v. cretacea
Urceolaria scruposa v. diacapsis
Urceolaria scruposa v. gypsacea
Urceolaria scruposa v. iridata
Urceolaria scruposa v. minor
Urceolaria scruposula
Urceolaria scruposus f. alba
Urceolaria subsordida
Urceolaria variolarioides
Urceolaria villarsii
Urceolaria violaria
Urceolaria wulfenii
Urceolina peruviana
Ureaplasma
Ureaplasma urealyticum
Uredinales
Urediniomycetes
Urena
Urena lobata
Urena sinuata
Urera
Urera baccifera
Urera caracasana
Urera chlorocarpa
Urera glabra
Urera kaalae
Urera laciniata
Urera obovata
Urera sp.
Uresiphita
Uresiphita cruentalis
Uresiphita gilvata
Uresiphita limbalis
Uresiphita polygonalis
Urginea
Urginea maritima
Latina Nova