Calflora		Genus Index   U
	Older names are written in gray. Use Name Status for synonym relationships. Ulex Ulex europaeus Ulmus Ulmus alata Ulmus americana Ulmus glabra Ulmus minor Ulmus parvifolia Ulmus pumila Ulmus thomasii Ulota Ulota megalospora Ulota obtusiuscula Ulota phyllantha Ulva Ulva clathratioides Ulva pertusa Umbellularia Umbellularia californica Undaria Undaria pinnatifida Urochloa Urochloa arizonica Urochloa maxima Urochloa mosambicensis Urochloa ramosa Urochloa texana Uropappus Uropappus lindleyi Urospermum Urospermum picroides Urtica Urtica dioica Urtica dioica ssp. dioica Urtica dioica ssp. gracilis Urtica dioica ssp. holosericea Urtica urens Usnea Usnea longissima Utricularia Utricularia gibba Utricularia inflata Utricularia intermedia Utricularia macrorhiza Utricularia minor Utricularia ochroleuca Utricularia subulata